JP2021118574A - Energy management system, energy management device, energy management method, and control program - Google Patents

Abstract

To provide an energy management system, energy management device, energy management method, and program that can introduce renewable energy into a local grid (distribution line).SOLUTION: An energy management system 100, which includes a photovoltaic power generation system and a water electrolysis device connected to a power distribution line includes: a monitoring unit 120, which monitors distribution power, which is power supplied between a connection point of the photovoltaic power generation system in the power distribution line and a connection point of a water electrolysis device 300; a calculation unit 130, which calculates the power consumption of the water electrolysis device based on the distribution power and a threshold value of the power supplied to the power distribution line; and a creation unit 140, which derives a power consumption command value based on the power consumption calculated by the calculation unit, and creates control information for controlling the water electrolysis device including the derived power consumption command value.SELECTED DRAWING: Figure 2

Description

Embodiments of the present invention relate to energy management systems, energy management devices, energy management methods, and control programs.

A P2G (Power to Gas) system is known. The P2G system produces hydrogen and methane by electrolyzing water with electricity procured from renewable energy, and stores and uses the produced hydrogen and methane. The P2G system is expected as one of the technologies that contributes to the stabilization of the amount of power generated by renewable energy, which fluctuates due to changes in seasons and weather, by taking advantage of the characteristics of hydrogen that can be stored and transported for a long period of time.
Regarding the technology for producing hydrogen from power procured from a power plant using renewable energy, a technology that enables highly efficient power supply by effectively utilizing photovoltaic energy is known (for example, patent documents). 1). This technology is a photovoltaic power generation device, a power conversion controller having an output control function for converting DC power from the photovoltaic power generation device into AC power and obtaining maximum power, and DC power from the photovoltaic power generation device. It is provided with a hydrogen production means for producing hydrogen using the above, a switching means for switching the electrical connection configuration of the photovoltaic power generation device, the power conversion controller, and the hydrogen production means, and a control unit for transmitting a control signal to the switching means. .. The rated output power of the photovoltaic power generation device is larger than the rated output power of the power conversion controller, and the control unit compares the predicted power generation that can be generated by the photovoltaic power generation device with the output power or output power, and power conversion. The switching means is controlled according to the conversion efficiency characteristics of the controller.

Japanese Unexamined Patent Publication No. 2014-203274

Consider expanding the introduction of renewable energy.
As mentioned above, the power generation of renewable energy is affected by natural conditions such as the weather and changes erratically, so the conditions under which the rated power of the power generation equipment can be generated are limited. If the electric power generated by renewable energy is newly introduced into the local grid (distribution line), it is necessary to enhance the electric power network that matches the rated electric power generated by renewable energy.
In addition, although it is possible to eliminate greenhouse gas emissions by using hydrogen as fuel, business establishments that use hydrogen as fuel are dispersed, making economical transportation difficult. In order to efficiently distribute hydrogen to dispersed energy consumers, the above-mentioned hydrogen production system in the local grid is required.
The present invention has been made in view of the above points, and an object of the present invention is to provide a management system, an energy management device, an energy management method, and a control program capable of introducing renewable energy into a local grid (distribution line). There is.

One aspect of the present invention is an energy management system including a photovoltaic power generation system connected to a distribution line and a water electrolyzer, wherein the connection point of the photovoltaic power generation system in the distribution line and the water electrolyzer. The power consumption of the water electrolyzer is calculated based on the monitoring unit that monitors the distribution power, which is the power supplied between the connection points, the threshold of the power supplied to the distribution line, and the distribution power. Based on the calculation unit and the power consumption calculated by the calculation unit, a power consumption command value is derived, and control information for controlling the water electrolysis device including the derived power consumption command value is created. It is an energy management system equipped with a department.
In the energy management system of one aspect of the present invention, the calculation unit calculates the power consumption of the water electrolyzer by subtracting the threshold value of the power from the distribution power.
In the energy management system of one aspect of the present invention, the monitoring unit is the identification information of the photovoltaic power generation system acquired from the storage unit that stores the identification information of the photovoltaic power generation system and the identification information of the water electrolysis device in association with each other. Based on the pairing of the water electrolyzer with the identification information of the water electrolyzer, the connection point of the photovoltaic power generation system corresponding to the identification information of the photovoltaic power generation system and the connection of the water electrolysis device corresponding to the identification information of the water electrolysis device. The distribution power supplied to and from the location is monitored, and the creation unit obtains the water electrolyzer corresponding to the identification information of the water electrolyzer included in the pairing, including the derived power consumption command value. Create control information as the destination.
In the energy management system of one aspect of the present invention, the estimation unit for estimating the distributed power is further provided, and the monitoring unit monitors the distributed power estimated by the estimation unit.
In the energy management system of one aspect of the present invention, the energy management system further includes a determination unit for determining whether or not the power consumption calculated by the calculation unit exceeds the power consumption that can be consumed by the water electrolyzer. Based on the result of the determination by the determination unit, a limit command value for limiting the output of the photovoltaic power generation system is derived, and the power supplied by the photovoltaic power generation system including the derived limit command value is limited. Create control information for.
One aspect of the present invention is the electric power supplied between the connection point of the photovoltaic power generation system and the connection point of the water electrolysis device in the distribution line to which the photovoltaic power generation system and the water electrolyzer are connected. A monitoring unit that monitors the distribution power, a calculation unit that calculates the power consumption of the water electrolyzer based on the threshold value of the power supplied to the distribution line, and the distribution power, and the calculation unit that the calculation unit calculates. It is an energy management device including a creation unit that derives a power consumption command value based on the power consumption and creates control information for controlling the water electrolysis device including the derived power consumption command value.
One aspect of the present invention is an energy management method executed by a management system including a photovoltaic power generation system connected to a distribution line and a water electrolyzer, and a connection point of the photovoltaic power generation system in the distribution line. Based on the step of monitoring the distribution power, which is the power supplied between the connection points of the water electrolyzer, the threshold of the power supplied to the distribution line, and the distribution power, the water electrolyzer To control the step of calculating the power consumption, the step of deriving the power consumption command value based on the power consumption calculated in the calculation step, and the water electrolyzer including the derived power consumption command value. It is an energy management method executed by an energy management system having a step of creating control information.
One aspect of the present invention is to connect a computer of an energy management system including a photovoltaic power generation system connected to a distribution line and a water electrolyzer to a connection point of the photovoltaic power generation system on the distribution line and the water electrolyzer. The power consumption of the water electrolyzer is calculated based on the step of monitoring the distribution power, which is the power supplied between the connection points, the threshold of the power supplied to the distribution line, and the distribution power. Create control information for controlling the water electrolyzer including the step, the step of deriving the power consumption command value based on the power consumption calculated in the calculation step, and the derived power consumption command value. It is a control program that executes steps.

According to an embodiment of the present invention, it is possible to provide an energy management system, an energy management device, an energy management method, and a control program capable of introducing renewable energy into a local grid (distribution line).

It is a figure which shows the example 1 of the outline of the energy management system which concerns on embodiment. It is a figure which shows the example 2 of the outline of the energy management system which concerns on embodiment. It is a block diagram which shows an example of the energy management apparatus included in the energy management system which concerns on embodiment. It is a figure which shows an example of correspondence information. It is a figure which shows an example of the water electrolyzer information. It is a figure for demonstrating an example of the operation of the energy management apparatus included in the energy management system which concerns on embodiment. It is a sequence chart which shows an example of the operation of the energy management system which concerns on embodiment. It is a block diagram which shows an example of the energy management apparatus included in the energy management system which concerns on the 1st modification of embodiment. It is a figure which shows an example of the water electrolyzer information. It is a figure which shows an example of the photovoltaic power generation system information. It is a sequence chart which shows an example of the operation of the energy management system which concerns on the 1st modification of embodiment. It is a figure which shows the outline of the energy management system which concerns on the 2nd modification of embodiment. It is a block diagram which shows an example of the energy management apparatus included in the energy management system which concerns on the 2nd modification of embodiment. It is a figure which shows an example of correspondence information. It is a sequence chart which shows an example of the operation of the energy management system which concerns on the 2nd modification of embodiment.

Next, the energy management system, the energy management device, the energy management method, and the control program of the present embodiment will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.
In all the drawings for explaining the embodiment, the same reference numerals are used for those having the same function, and the repeated description will be omitted.
Further, "based on XX" in the present application means "based on at least XX", and includes a case where it is based on another element in addition to XX. Further, "based on XX" is not limited to the case where XX is directly used, but also includes the case where it is based on the case where calculation or processing is performed on XX. "XX" is an arbitrary element (for example, arbitrary information).

(Embodiment)
(Energy management system)
FIG. 1A is a diagram showing an example 1 of an outline of an energy management system according to an embodiment.
The energy management system 1 of the embodiment includes a power sensor 50-1, a power sensor 50-2, a power sensor 50-3, a smart meter 60-1, a smart meter 60-2, and a smart meter 60-3. , Energy management device 100, photovoltaic power generation system 200-1, photovoltaic power generation system 200-2, photovoltaic power generation system 200-3, water electrolysis device 300-1, water electrolysis device 300-2, It includes a water electrolyzer 300-3, an energy consumer CE-1, an energy consumer CE-2, and an energy consumer CE-3.

Power sensor 50-1, power sensor 50-2, power sensor 50-3, photovoltaic system 200-1, photovoltaic system 200-2, photovoltaic system 200-3, and water electrolysis The device 300-1, the water electrolyzer 300-2, the water electrolyzer 300-3, the consumer CE-1, the consumer CE-2, and the consumer CE-3 are locals such as a distribution line DL. Connected to the grid.
The power sensor 50-1, the power sensor 50-2, the power sensor 50-3, the energy management device 100, the water electrolyzer 300-1, the water electrolyzer 300-2, and the water electrolyzer 300-3. Are connected via the network NW and can communicate with each other. The network NW includes the Internet, WAN (Wide Area Network), LAN (Local Area Network), public line, provider device, dedicated line, wireless base station and the like.

Each of the power sensor 50-1, the power sensor 50-2, and the power sensor 50-3 detects the power supplied to the distribution line DL. Specifically, the power sensor 50-1 is the power supplied between the connection point of the photovoltaic power generation system 200-1 and the connection point of the water electrolysis device 300-1 in the distribution line DL (hereinafter, "No. 1"). 1) "Distribution power") is detected. The first distribution power is mainly supplied by the photovoltaic power generation system 200-1 between the connection portion of the photovoltaic power generation system 200-1 and the connection portion of the water electrolyzer 300-1. The power sensor 50-1 outputs the detection result of the first distributed power including the identification information of the power sensor 50-1 to the energy management device 100.
The power sensor 50-2 is the power supplied between the connection point of the photovoltaic power generation system 200-2 and the connection point of the water electrolysis device 300-2 in the distribution line DL (hereinafter referred to as "second distribution power"). ) Is detected. The second distribution power is mainly supplied by the photovoltaic power generation system 200-2 between the connection portion of the photovoltaic power generation system 200-2 and the connection portion of the water electrolyzer 300-2. The power sensor 50-2 outputs the detection result of the second distributed power including the identification information of the power sensor 50-2 to the energy management device 100.
The power sensor 50-3 is the power applied between the connection point of the photovoltaic power generation system 200-3 and the connection point of the water electrolysis device 300-3 in the distribution line DL (hereinafter referred to as "third distribution power"). ) Is detected. The second distribution power is mainly supplied by the photovoltaic power generation system 200-3 between the connection portion of the photovoltaic power generation system 200-3 and the connection portion of the water electrolysis device 300-3. The power sensor 50-3 outputs the detection result of the third distributed power including the identification information of the power sensor 50-3 to the energy management device 100.

Each of the photovoltaic power generation system 200-1, the photovoltaic power generation system 200-2, and the photovoltaic power generation system 200-3 uses a solar cell to generate electricity by a power generation method that directly converts sunlight into electric power. It is a system to do. An example of each of the photovoltaic power generation system 200-1 and the photovoltaic power generation system 200-2 and the photovoltaic power generation system 200-3 is a mega solar. Mega solar refers to a large-scale solar power plant. Each of the photovoltaic power generation system 200-1 and the photovoltaic power generation system 200-2 and the photovoltaic power generation system 200-3 is included in the power system, and the DC power generated by the solar cell is used as a power conditioner (PCS:). Power Conditioning System) converts it into AC power, connects it to the grid, and supplies the power to loads such as consumers CE1 to 3.

Each of the energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3 uses the electric power supplied from the distribution line DL. Specifically, the energy consumer CE-1 mainly uses the electric power generated by the photovoltaic power generation system 200-1 and supplied from the distribution line DL. The energy consumer CE-2 mainly uses the electric power generated by the photovoltaic power generation system 200-2 and supplied from the distribution line DL. The energy consumer CE-3 mainly uses the electric power generated by the photovoltaic power generation system 200-3 and supplied from the distribution line DL.
An example of each of the energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3 is a factory. A factory is a facility in the manufacturing industry that produces and manufactures actual products and performs maintenance such as machine-related inspections, maintenance, and maintenance of ready-made products. Boilers are installed in the factory. The boiler is provided with a combustion chamber (fire chamber) for burning fuel and a heat exchange device for transferring the heat obtained from the combustion to water and converting it into steam or hot water (= hot water). A boiler is a device that generates heat in the form of steam, hot water, and the like. An example of a boiler is hydrogen fueled.
Hereinafter, as an example, the case where each of the energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3 is a factory will be described. A water electrolyzer 300-1 and a water electrolyzer 300-2 and water electrolysis are located in the vicinity of the energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3, which are factories. Each of the devices 300-3 is installed. The energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3 are provided with a smart meter 60-1, a smart meter 60-2, and a smart meter 60-3, respectively. ing.

In the present embodiment, the photovoltaic power generation system 200-1 and the water electrolyzer 300-1 are associated as a pairing (coupling), and this pairing is further associated with the power sensor 50-1. Further, in the present embodiment, the photovoltaic power generation system 200-2 and the water electrolyzer 300-2 are associated as a pairing, and further, this pairing is associated with the power sensor 50-2. Further, in the present embodiment, the photovoltaic power generation system 200-3 and the water electrolyzer 300-3 are associated as a pairing, and further, this pairing is associated with the power sensor 50-3.
Each of the energy consumer CE-1 to the energy consumer CE-3 may be composed of a plurality of consumers. Further, each of the photovoltaic power generation systems 200-1 to the photovoltaic power generation system 200-3 may be composed of a plurality of photovoltaic power generation systems. Further, each of the water electrolyzers 300-1 to 300-3 may be composed of a plurality of water electrolyzers.
FIG. 1B is a diagram showing Example 2 of the outline of the energy management system according to the embodiment. In the energy management system 1'shown in FIG. 1B, the power sensor 50-1 is located between the connection point of the water electrolyzer 300-1 and the connection point of the photovoltaic power generation system 200-2 in the distribution line DL (hereinafter,). The power supplied to (referred to as "section A") is detected. The power sensor 50-2 supplies the electric power supplied between the connection point of the water electrolyzer 300-2 and the connection point of the photovoltaic power generation system 200-3 (hereinafter referred to as “section B”) in the distribution line DL. To detect. The power sensor 50-2 detects the power supplied between the connection point of the water electrolyzer 300-3 and the distribution substation SS (hereinafter referred to as “section C”) in the distribution line DL. In this case, for sections A to C that are operated with power below the limited threshold, the photovoltaic power generation system 200-1 to the photovoltaic power generation system 200-3 and the water electrolyzer, which are upstream of each assumed power flow. 300-1 to the water electrolyzer 300-3 are associated by being paired with 1: N (N is an integer of N> 0) or M: N (M is an integer of m> 0). ..
By constructing the pairing, it becomes possible to associate the electric power supplied to the water electrolyzer 300-1 which is not a water electrolyzer that receives power directly from the renewable energy source with the electric power supplied to the energy consumer EC-1. It will be possible to supply electricity and gas including environmental value, and it can be embodied as an energy service provider (ESP). The explanation will be continued by returning to FIG. 1A.

The water electrolyzer 300-1, the water electrolyzer 300-2, and the water electrolyzer 300-3 are each a photovoltaic power generation system 200-1, a photovoltaic power generation system 200-2, and a photovoltaic power generation system, respectively. Hydrogen is produced by electrolyzing water using the electricity supplied by each of 200-3.
An example of each of the water electrolyzer 300-1 and the water electrolyzer 300-2 and the water electrolyzer 300-3 is a PEM (Polymer Electrolyte Membrane) type water electrolyzer. The PEM type water electrolyzer produces hydrogen by electrolyzing water by a method called a solid polymer type. Each of the water electrolyzer 300-1 and the water electrolyzer 300-2 and the water electrolyzer 300-3 receives the water electrolyzer control information transmitted by the energy management device 100, and the received water electrolyzer control information. Acquires the power consumption command value included in. Each of the water electrolyzer 300-1 and the water electrolyzer 300-2 and the water electrolyzer 300-3 consumes the power supplied to the distribution line DL based on the acquired power consumption command value. Produces hydrogen. Since the allowable power demands of the energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3 are finite, the smart meter 60-1 and the smart meter 60-2, respectively. The command values for the water electrolyzer 300-1 and the water electrolyzer 300-2 and the water electrolyzer 300-3 based on the measured values from the smart meter 60-3 are limited by the energy management device 100. , Will be sent.

The energy management device 100 acquires the detection result of the electric power supplied to the distribution line DL by each of the electric power sensor 50-1, the electric power sensor 50-2, and the electric power sensor 50-3. Here, in the example shown in FIG. 1B, the energy management device 100 includes a section A of the distribution line DL measured by each of the power sensor 50-1, the power sensor 50-2, and the power sensor 50-3. , The detection result of the electric power supplied to the section B of the distribution line DL and the section C of the distribution line DL is acquired. The energy management device 100 monitors whether or not the electric power detection result exceeds the electric power threshold value based on the acquired electric power detection result. In the present embodiment, as an example of the power threshold value, the case where the upper limit value of the distribution power that can be supplied to the distribution line DL is applied will be continued. The upper limit of the distribution power that can be supplied to the distribution line DL is set in advance when the power system is introduced.
Specifically, the energy management device 100 acquires the detection result of the first distribution power output by the power sensor 50-1, and the first distribution power is distributed based on the detection result of the acquired first distribution power. Monitor whether or not the upper limit of the power that can be supplied to the electric wire DL is exceeded. The energy management device 100 acquires the detection result of the second distribution power output by the power sensor 50-2, and can supply the second distribution power to the distribution line DL based on the detection result of the acquired second distribution power. Monitor whether the upper limit of electric power is exceeded. The energy management device 100 acquires the detection result of the third distribution power output by the power sensor 50-3, and based on the acquired detection result of the third distribution power, the third distribution power can be supplied to the distribution line DL. Monitor whether the upper limit of electric power is exceeded.

The energy management device 100 calculates the power consumption of each of the water electrolyzer device 300-1, the water electrolyzer device 300-2, and the water electrolyzer device 300-3 based on the result of monitoring the detection result of the distribution power. ..
Specifically, when the energy management device 100 determines that the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied from the first distribution power to the distribution line DL By subtracting the upper limit value, the power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 (hereinafter referred to as "first power consumption") is calculated. Here, in the example shown in FIG. 1B, when the energy management device 100 determines that the first distribution power exceeds the upper limit of the power that can be supplied to the section A of the distribution line DL, the energy management device 100 starts from the first distribution power. By subtracting the upper limit of the power that can be supplied to the section A of the distribution line DL, the first power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 is calculated. When the energy management device 100 determines that the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100 subtracts the upper limit of the power that can be supplied to the distribution line DL from the second distribution power. Thereby, the power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 (hereinafter referred to as "second power consumption") is calculated. Here, in the example shown in FIG. 1B, when the energy management device 100 determines that the second distribution power exceeds the upper limit of the power that can be supplied to the section B of the distribution line DL, the energy management device 100 starts from the second distribution power. By subtracting the upper limit of the power that can be supplied to the section B of the distribution line DL, the second power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 is calculated. When the energy management device 100 determines that the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100 subtracts the upper limit of the power that can be supplied to the distribution line DL from the third distribution power. Thereby, the power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 (hereinafter referred to as "third power consumption") is calculated. Here, in the example shown in FIG. 1B, when the energy management device 100 determines that the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL section C, the energy management device 100 distributes the power from the third distribution power. By subtracting the upper limit value of the electric power that can be supplied to the electric power line DL section C, the third electric power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 is calculated.

The energy management device 100 derives a power consumption command value (hereinafter referred to as "first power consumption command value") for setting the power consumption of the water electrolysis device 300-1 based on the calculated first power consumption. The energy management device 100 acquires the address of the water electrolyzer device 300-1 associated with the identification information of the water electrolyzer device 300-1 from the water electrolyzer device information. The energy management device 100 uses the acquired address of the water electrolyzer device 300-1 as a destination to create water electrolyzer device control information including the first power consumption command value. The energy management device 100 transmits the created water electrolyzer device control information (hereinafter referred to as “first water electrolyzer device control information”) to the water electrolyzer device 300-1.
The energy management device 100 derives a power consumption command value (hereinafter referred to as "second power consumption command value") for setting the power consumption of the water electrolysis device 300-2 based on the calculated second power consumption. The energy management device 100 acquires the address of the water electrolyzer device 300-2 associated with the identification information of the water electrolyzer device 300-2 from the water electrolyzer device information. The energy management device 100 uses the acquired address of the water electrolyzer device 300-2 as a destination to create water electrolyzer device control information including the second power consumption command value. The energy management device 100 transmits the created water electrolyzer device control information (hereinafter referred to as “second water electrolyzer device control information”) to the water electrolyzer device 300-2.
The energy management device 100 derives a power consumption command value (hereinafter referred to as "third power consumption command value") for setting the power consumption of the water electrolysis device 300-3 based on the calculated third power consumption. The energy management device 100 acquires the address of the water electrolyzer device 300-3 associated with the identification information of the water electrolyzer device 300-3 from the water electrolyzer device information. The energy management device 100 uses the acquired address of the water electrolyzer device 300-3 as a destination to create water electrolyzer device control information including the third power consumption command value. The energy management device 100 transmits the created water electrolyzer device control information (hereinafter referred to as “third water electrolyzer device control information”) to the water electrolyzer device 300-3.

The water electrolyzer 300-1 receives the first water electrolyzer control information transmitted by the energy management device 100. The water electrolyzer 300-1 acquires the first power consumption command value included in the received first water electrolyzer control information. The water electrolyzer 300-1 controls the power consumption of the self-water electrolyzer 300-1 based on the acquired first power consumption command value.
The water electrolyzer 300-2 receives the second water electrolyzer control information transmitted by the energy management device 100. The water electrolyzer 300-2 acquires the second power consumption command value included in the received second water electrolyzer control information. The water electrolyzer 300-2 controls the power consumption of the self-water electrolyzer 300-2 based on the acquired second power consumption command value.
The water electrolyzer 300-3 receives the third water electrolyzer control information transmitted by the energy management device 100. The water electrolyzer 300-3 acquires the third power consumption command value included in the received third water electrolyzer control information. The water electrolyzer 300-3 controls the power consumption of the self-water electrolyzer 300-3 based on the acquired third power consumption command value.
As described above, in the example shown in FIG. 1B, the sections A to C of the distribution line DL are operated at the upper limit values set for each, and in particular, the threshold value of the section C is dynamically set. As a result, it is possible to limit the bank reverse power flow of the distribution substation SS, so that the renewable energy utilization rate of the local grid can also be controlled.
In addition, in a conventional storage battery system, it is necessary to discharge the stored power, so it cannot be discharged when the distribution line is highly used, and it is necessary to perform control that takes into account the time axis, such as sliding at night. Become. Further, in the conventional system using a storage battery, the utilization rate of the threshold setting section remains high due to the electric power discharged by the power storage system itself, and the effect of promoting the spread of power generation by renewable energy is limited. On the other hand, according to the present embodiment in which the energy consumer CE, the photovoltaic power generation system 200, and the water electrolysis device 300 are associated with each other, it is possible to arbitrarily set the distribution amount of electric power in the threshold setting section, and therefore, it is within the pairing area. Since the system takes into account not only the heat demand but also the electric power demand, it is possible to flexibly respond to the demand for the type and amount of energy. Therefore, in the present embodiment, it is possible to dramatically improve the amount of renewable energy introduced in the distribution network.
Next, the operation mainly at night will be specifically described with reference to FIG. 1B.
At night, there is no power generated by a large number of photovoltaic power plants connected to the power grid, that is, power generated by the photovoltaic power generation system 200. On the other hand, if a wind power plant is connected to an upper system, the connected wind power plant does not stop power generation even at night, and the power demand generally decreases, so it is renewable. In some cases, the power supply by energy increases with respect to the power demand. Therefore, at night, the market price of electricity in circulation tends to fall. Therefore, at night, it is clear that the electric power contains a large amount of renewable energy, and it is possible to procure the electric power at low cost. In such a case, since the electric power measured by the electric power sensor 50-1 is the electric power flowing through the section A of the distribution line DL whose threshold is limited, the electric power is absorbed by the water electrolyzer 300-1. It will be possible to supply CO2-free fuel to energy consumers while increasing the utilization rate of the distribution network DL. The explanation will be continued by returning to FIG. 1A.

Hereinafter, any power sensor among the power sensor 50-1, the power sensor 50-2, and the power sensor 50-3 will be referred to as the power sensor 50. Of the first distribution power, the second distribution power, and the third distribution power, the distribution power detected by the power sensor 50 is described as the distribution power.
Hereinafter, any of the photovoltaic power generation system 200-1, the photovoltaic power generation system 200-2, and the photovoltaic power generation system 200-3 will be referred to as a photovoltaic power generation system 200. Hereinafter, any of the water electrolyzer 300-1, the water electrolyzer 300-2, and the water electrolyzer 300-3 will be referred to as the water electrolyzer 300. Hereinafter, among the first water electrolyzer control information, the second water electrolyzer control information, and the third water electrolyzer control information, the water electrolyzer control information transmitted by the water electrolyzer 300 is referred to as water electrolyzer control information. It is described as. Hereinafter, any consumer among the energy consumer CE-1, the energy consumer CE-2, and the energy consumer CE-3 will be referred to as an energy consumer CE.
Hereinafter, the energy management system 1 shown in FIG. 1A will be described, but it can also be applied to the energy management system shown in FIG. 1B.

Hereinafter, the energy management device 100 included in the energy management system 1 will be described in detail.
FIG. 2 is a block diagram showing an example of an energy management device included in the energy management system according to the embodiment. FIG. 2 shows a power sensor 50 and a water electrolyzer 300 in addition to the energy management device 100.
[Energy management device 100]
The energy management device 100 is realized by a device such as a personal computer, a server, or an industrial computer. The energy management device 100 includes, for example, a communication unit 110, a monitoring unit 120, a calculation unit 130, a creation unit 140, and a storage unit 150.
The communication unit 110 is realized by a communication module. Specifically, the communication unit 110 is composed of a device that performs wired communication. Further, the communication unit 110 may be configured by a wireless device that performs wireless communication by wireless communication technology such as LTE or wireless LAN.
The communication unit 110 communicates between the power sensor 50 and the water electrolyzer 300 via the network NW. Specifically, the communication unit 110 receives the detection result of the distribution power output by the power sensor 50. Here, the distributed power is supplied by the photovoltaic power generation system 200. The communication unit 110 acquires the water electrolyzer control information output by the creation unit 140, and transfers the acquired water electrolyzer control information to the water electrolyzer 300 associated with the photovoltaic power generation system 200 that supplies the distribution power to the distribution line. Send.

The storage unit 150 is realized by an HDD (Hard Disk Drive), a flash memory, a RAM (Random Access Memory), a ROM (Read Only Memory), or the like. The storage unit 150 stores the correspondence information 152 and the water electrolyzer information 154. Correspondence information 152 and water electrolyzer information 154 may be stored in the cloud.
(Correspondence information 152)
Correspondence information 152 includes identification information of a photovoltaic power generation system (photovoltaic power generation system identification information), identification information of a power sensor (power sensor identification information), and identification information of a water electrolysis device (water electrolysis device identification information). It is the information in the associated table format. Here, in the correspondence information 152, the pairing of the photovoltaic power generation system 200 and the water electrolysis device 300 installed in the vicinity of the energy consumer CE that mainly uses the electric power supplied by the photovoltaic power generation system 200 is described. In the distribution line DL, the power sensor 50 that detects the power applied between the connection point of the photovoltaic power generation system 200 included in the pairing and the connection point of the water electrolysis device 300 is associated with each other.
FIG. 3 is a diagram showing an example of correspondence information. The correspondence information 152 shown in FIG. 3 is associated with the photovoltaic power generation system identification information “PV0001”, the power sensor identification information “VS0001”, and the water electrolysis device identification information “WE0001”, and is associated with the photovoltaic power generation system identification information. "PV0002", the power sensor identification information "VS0002", and the water electrolysis device identification information "WE0002" are associated with each other, and the photovoltaic power generation system identification information "PV0003", the power sensor identification information "VS0003", and the water electrolysis device. It is stored in association with the identification information "WE0003". This information is stored when the operation of the energy management system 1 is started.

(Water electrolyzer information 154)
The water electrolyzer information 154 is table-type information in which the water electrolyzer identification information and the water electrolyzer address are associated with each other. An example of a water electrolyzer address is an IP address.
FIG. 4 is a diagram showing an example of water electrolyzer information. In the water electrolyzer information 154 shown in FIG. 4, the water electrolyzer information 154 is associated with the water electrolyzer identification information "WE0001" and the water electrolyzer address "AAAAA", and the water electrolyzer identification information "WE0002". Is associated with the water electrolyzer address "BBBBBB", and the water electrolyzer identification information "WE0003" and the water electrolyzer address "CCCCC" are associated and stored. This information is stored when the operation of the energy management system 1 is started. The explanation will be continued by returning to FIG.

The monitoring unit 120, the calculation unit 130, and the creating unit 140 are realized by, for example, a hardware processor such as a CPU (Central Processing Unit) executing a program (software) stored in the storage unit 150. In addition, some or all of these functional parts are LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), GPU (Graphics) hardware such as GPU (Graphics). It may be realized by a part (including a circuit), or it may be realized by the cooperation of software and hardware. The program may be stored in advance in a storage device (a storage device including a non-transient storage medium) such as an HDD (Hard Disk Drive) or a flash memory, or a removable storage such as a DVD or a CD-ROM. It is stored in a medium (non-transient storage medium), and may be installed by attaching the storage medium to a drive device.

The monitoring unit 120, the calculation unit 130, and the creation unit 140 will be described.
The monitoring unit 120 acquires the detection result of the distribution power received by the communication unit 110. The monitoring unit 120 monitors the detection result of the acquired distribution power.
Specifically, the monitoring unit 120 monitors whether or not the detection result of the distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL based on the detection result of the distribution power. When the monitoring unit 120 determines that the detection result of the distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the monitoring unit 120 associates the detection result of the distribution power with the power sensor identification information of the power sensor 50 that outputs the detection result. The water electrolyzer identification information stored in the above is specified from the corresponding information 152. By specifying the water electrolyzer identification information, the water electrolyzer 300 to be controlled can be specified. The monitoring unit 120 creates instruction information for calculating the power consumption of the water electrolyzer 300 corresponding to the specified water electrolyzer identification information. The monitoring unit 120 outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130.

The calculation unit 130 acquires the detection result of the distribution power received by the communication unit 110 when the water electrolyzer identification information output by the monitoring unit 120 and the instruction information are acquired. The calculation unit 130 calculates the power consumption of the water electrolyzer 300 corresponding to the acquired water electrolyzer identification information based on the upper limit of the power that can be supplied to the distribution line DL and the detection result of the acquired distribution power. .. For example, the calculation unit 130 calculates the power consumption of the water electrolyzer 300 by subtracting the upper limit value of the power that can be supplied to the distribution line DL from the detection result of the distribution power. The calculation unit 130 outputs the water electrolyzer identification information and the calculation result of the power consumption of the water electrolyzer 300 to the creation unit 140.
FIG. 5 is a diagram showing an example of the operation of the energy management device included in the energy management system according to the embodiment. FIG. 5 shows an example in which the electric power supplied to the energy consumer CE is suppressed from the electric power supplied to the distribution line DL. In FIG. 5, the vertical axis is the output power and the horizontal axis is the time. FIG. 5 shows the electric power generated by the photovoltaic power generation system 200, the electric power supplied to the distribution line DL, and the electric power supplied to the water electrolyzer 300. In the example shown in FIG. 5, the upper limit of the electric power that can be supplied to the distribution line DL is 2.0 [MW]. That is, of the electric power generated by the photovoltaic power generation system 200, the electric power of 2.0 [MW] or less is supplied to the energy consumer CE, but the electric power exceeding 2.0 [MW] is the water electrolyzer 300. Is supplied to. The electric power supplied to the water electrolyzer 300 is consumed by the water electrolyzer 300. That is, the electric power supplied to the energy consumer CE from the electric power supplied by the photovoltaic power generation system 200 to the distribution line DL is suppressed. Returning to FIG. 2, the explanation will be continued.

The creation unit 140 acquires the water electrolyzer identification information output by the calculation unit 130 and the calculation result of the power consumption of the water electrolyzer 300. The creation unit 140 derives a power consumption command value for instructing the power consumption of the water electrolyzer 300 based on the acquired calculation result of the power consumption of the water electrolyzer 300. For example, an arithmetic expression for deriving the power consumption command value is set from the calculation result of the power consumption of the water electrolysis device 300, and the creating unit 140 derives the power consumption command value based on the arithmetic expression. The creation unit 140 acquires the address of the water electrolyzer 300 stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154. The creation unit 140 creates the water electrolyzer control information destined for the acquired address of the water electrolyzer 300, including the derived power consumption command value. The creation unit 140 outputs the created water electrolyzer control information to the communication unit 110.

Next, the operation of the energy management system will be described.
(Operation of energy management system)
FIG. 6 is a sequence chart showing an example of the operation of the energy management system according to the embodiment.
(Step S1-1)
The power sensor 50 detects the distributed power.
(Step S2-1)
The power sensor 50 transmits the detection result of the distributed power to the energy management device 100.
(Step S3-1)
In the energy management device 100, the communication unit 110 receives the detection result of the distributed power transmitted by the power sensor 50.
(Step S4-1)
In the energy management device 100, the monitoring unit 120 acquires the detection result of the distribution power received by the communication unit 110. The monitoring unit 120 monitors whether or not the distributed power exceeds the upper limit of the power that can be supplied to the distribution line DL based on the acquired detection result of the distribution power. When the monitoring unit 120 determines that the distribution power does not exceed the upper limit of the power that can be supplied to the distribution line DL, the process proceeds to step S1-1. In this case, the power consumption of the water electrolyzer 300 is not controlled.
(Step S5-1)
In the energy management device 100, when the monitoring unit 120 determines that the distributed power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power sensor identification of the power sensor 50 that outputs the detection result of the distributed power. The water electrolyzer identification information stored in association with the information is specified from the corresponding information 152. Here, the detection result of the distributed power includes the identification information of the power sensor 50 that has detected the distributed power. The monitoring unit 120 creates instruction information for calculating the power consumption of the water electrolyzer 300 corresponding to the specified water electrolyzer identification information. The monitoring unit 120 outputs the specified water electrolyzer identification information and the created instruction information to the calculation unit 130.

(Step S6-1)
In the energy management device 100, the calculation unit 130 acquires the water electrolysis device identification information output by the monitoring unit 120 and the instruction information. The calculation unit 130 acquires the detection result of the power distribution power received by the communication unit 110. The calculation unit 130 can supply the distribution line DL from the detection result of the distribution power based on the upper limit value of the power that can be supplied to the distribution line DL based on the instruction information and the detection result of the acquired distribution power. The power consumption of the water electrolyzer 300 is calculated by subtracting the upper limit value of the electric power. The calculation unit 130 outputs the water electrolyzer identification information and the calculation result of the power consumption of the water electrolyzer 300 to the creation unit 140.
(Step S7-1)
In the energy management device 100, the creating unit 140 acquires the water electrolyzer identification information output by the calculation unit 130 and the calculation result of the power consumption of the water electrolyzer 300. The creation unit 140 derives a power consumption command value for instructing the power consumption of the water electrolyzer 300 based on the acquired calculation result of the power consumption of the water electrolyzer 300. The creation unit 140 acquires the address of the water electrolyzer 300 stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154. The creation unit 140 creates the water electrolyzer control information destined for the acquired address of the water electrolyzer 300, including the derived power consumption command value. The creation unit 140 outputs the created water electrolyzer control information to the communication unit 110.

(Step S8-1)
In the energy management device 100, the communication unit 110 acquires the water electrolysis device control information output by the creation unit 140. The communication unit 110 transmits the acquired water electrolyzer control information to the water electrolyzer 300.
(Step S9-1)
The water electrolyzer 300 receives the water electrolyzer control information transmitted by the energy management device 100.
(Step S10-1)
The water electrolyzer 300 acquires the power consumption command value included in the received water electrolyzer control information. The water electrolyzer 300 controls the power consumption based on the acquired power consumption command value. For example, the water electrolyzer 300 consumes electric power based on the power consumption command value from the electric power supplied to the distribution line DL by the photovoltaic power generation system 200. Specifically, the electric power generated by the photovoltaic power generation system 200 is supplied to the hydrogen generator of the water electrolyzer 300 from the DC / DC converter of the power source for the water electrolyzer 300. The hydrogen generator produces hydrogen according to the power consumption.
The hydrogen produced by the hydrogen generator is supplied to the gas tanks and boilers installed in the energy consumer CE. Gas tanks and boilers acquire hydrogen produced by hydrogen generators. The boiler consumes the acquired hydrogen. Hydrogen consumed by boilers reduces the consumption of fossil fuels consumed by other boilers. The gas tank stores the hydrogen acquired when the boiler does not consume hydrogen. The hydrogen stored in the gas tank supplies hydrogen to the boiler when the hydrogen generator is not operating or when the amount of hydrogen produced is insufficient.

In the above-described embodiment, the energy management system 1 pairs the photovoltaic power generation system 200-1 and the water electrolyzer 300-1 and the photovoltaic power generation system 200-2 and the water electrolyzer 300-2. And the case where the pairing of the photovoltaic power generation system 200-3 and the water electrolysis device 300-3 is provided has been described, but the present invention is not limited to this example. For example, the energy management system 1 may include 1 to 2 pairings of the photovoltaic power generation system 200 and the water electrolyzer 300, or may include 4 or more pairings.
In the above-described embodiment, the case where the hydrogen produced by the water electrolyzer 300 is consumed by the boiler installed in the energy consumer CE has been described. That is, the case where hydrogen is supplied to the energy consumer CE by the electric power supplied to the distribution line DL has been described. By consuming hydrogen in the energy consumer CE, it is possible to prevent the price of hydrogen from intervening in the energy distribution. However, the present invention is not limited to this example, and for example, the hydrogen produced by the water electrolyzer 300 may be shipped to the city gas supply area or may be shipped to the LP (liquefied petroleum) gas supply area. Further, for example, a curdle may be used to supply the product to the supply destination. Further, for example, the hydrogen produced by the water electrolyzer 300 may be supplied to the supply destination using a gas cylinder, curdle, or semi-trailer loader. That is, hydrogen produced by the electric power supplied to the distribution line DL may be supplied to the supply destination in the gas state. The hydrogen supplied to the supply destination may be mixed in the gas pipe.
In the above-described embodiment, as an example of the renewable energy, the case where the electric power generated by the photovoltaic power generation system is supplied to the distribution line DL has been described, but the present invention is not limited to this example. For example, electric power generated from energy resources that are constantly or repeatedly replenished by natural forces such as wind power, wave power / tidal power, running water / tidal power, geothermal power, and biomass may be supplied to the distribution line DL.
In the above-described embodiment, the case where the energy management device 100 acquires the detection result of the electric power supplied to the distribution line DL for each of the photovoltaic power generation systems 200 has been described, but the present invention is not limited to this example. For example, the energy management device 100 may acquire the tidal current of the distribution line DL.
In the above-described embodiment, the case where the energy management device 100 acquires the distribution power supplied between the connection point of the photovoltaic power generation system 200 and the connection point of the water electrolysis device 300 in the distribution line DL has been described. However, it is not limited to this example. For example, the energy management device 100 may acquire the tidal current between the energy consumer CE and the photovoltaic power generation system 200. For example, in the distribution line DL, the distribution power supplied between the connection point of the energy consumer CE-1 and the connection point of the photovoltaic power generation system 200-2, the connection point of the energy consumer CE-2, and the connection point. The distribution power supplied to and from the connection point of the photovoltaic power generation system 200-3 may be acquired.

According to the energy management system of the present embodiment, the energy management system is an energy management system including a solar power generation system connected to a distribution line and a water electrolyzer, and is a solar power generation system 200 in the distribution line DL. Based on the monitoring unit 120 that monitors the distribution power, which is the power supplied between the connection point of the water electrolyzer and the connection point of the water electrolyzer 300, the threshold of the power supplied to the distribution line DL, and the distribution power. , A calculation unit 130 that calculates the power consumption of the water electrolysis device 300, and a power consumption command value derived based on the power consumption calculated by the calculation unit 130, and the water electrolysis device 300 including the derived power consumption command value is controlled. It is provided with a creation unit for creating control information of the water electrolysis device for the purpose.
With this configuration, the power consumption of the water electrolyzer 300 can be controlled based on the distribution power and the threshold value of the power supplied to the distribution line DL, so that the photovoltaic power generation system 200 supplies the distribution line DL. Of the electric power generated, the electric power supplied to the energy consumer CE can be controlled. In the distribution line DL, renewable energy can be introduced into the local grid (distribution line) by strengthening the space between the connection point of the photovoltaic power generation system 200 and the connection point of the water electrolysis device 300. When introducing renewable energy into the local grid (distribution line), it is possible to limit the points where the distribution line DL is reinforced. Renewable energy that does not generate carbon dioxide can be introduced into the local grid (distribution line). As a result, the utilization rate of the power grid and the load factor of the energy consumer CE can be improved.

Further, the calculation unit 130 calculates the power consumption of the water electrolyzer 300 by subtracting the power threshold value from the distribution power. With this configuration, of the electric power generated by the photovoltaic power generation system 200, when the electric power threshold of the electric power supplied to the distribution line DL is exceeded, the portion exceeding the electric power threshold can be supplied to the water electrolyzer 300. .. In the distribution line DL, renewable energy can be introduced into the local grid (distribution line) by strengthening the space between the connection point of the photovoltaic power generation system 200 and the connection point of the water electrolysis device 300. When introducing renewable energy into the local grid (distribution line), it is possible to limit the points where the distribution line DL is reinforced.
Further, the monitoring unit 120 includes the identification information of the photovoltaic power generation system and the identification information of the water electrolysis device, which are acquired from the storage unit 150 that stores the identification information of the photovoltaic power generation system and the identification information of the water electrolysis device in association with each other. Distribution power supplied between the connection point of the photovoltaic power generation system corresponding to the identification information of the photovoltaic power generation system and the connection point of the water electrolysis device corresponding to the identification information of the water electrolysis device based on the pairing of The water electrolyzer control unit creates water electrolyzer control information destined for the water electrolyzer corresponding to the identification information of the water electrolyzer included in the pairing, including the derived power consumption command value.
In the distribution line DL, based on the pairing of the identification information of the photovoltaic power generation system and the identification information of the water electrolysis device, between the connection point of the corresponding photovoltaic power generation system 200 and the connection point of the water electrolysis device 300. By strengthening, renewable energy can be introduced into the local grid (distribution line). That is, since it is not necessary to reinforce the distribution line DL corresponding to the pairing and the pairing, when the renewable energy is introduced into the local grid (distribution line), the reinforcement points of the distribution line DL can be limited. ..

(First modification)
FIG. 1A can be applied to the energy management system 1a of the first modification of the embodiment. However, the energy management device 100a is provided instead of the energy management device 100. Further, the photovoltaic power generation system 200-1, the photovoltaic power generation system 200-2, and the photovoltaic power generation system 200-3 are connected to the energy management device 100a via the network NW.
The energy management device 100a acquires the detection result of the electric power supplied to the distribution line DL by each of the electric power sensor 50-1 and the electric power sensor 50-2 and the electric power sensor 50-3. The energy management device 100a monitors whether or not the electric power detection result exceeds the electric power threshold value based on the acquired electric power detection result. In the first modification of the present embodiment, the case where the upper limit value of the distribution power that can be supplied to the distribution line DL is applied as an example of the power threshold value will be continued. The upper limit of the distribution power that can be supplied to the distribution line DL is set in advance when the power system is introduced.
Specifically, the energy management device 100a acquires the detection result of the first distribution power output by the power sensor 50-1, and the first distribution power is distributed based on the detection result of the acquired first distribution power. Monitor whether or not the upper limit of the power that can be supplied to the electric wire DL is exceeded. The energy management device 100a acquires the detection result of the second distribution power output by the power sensor 50-2, and the second distribution power can be supplied to the distribution line DL based on the detection result of the acquired second distribution power. Monitor whether the upper limit of electric power is exceeded. The energy management device 100a acquires the detection result of the third distribution power output by the power sensor 50-3, and based on the acquired detection result of the third distribution power, the third distribution power can be supplied to the distribution line DL. Monitor whether the upper limit of electric power is exceeded.

The energy management device 100a calculates the power consumption of each of the water electrolyzer device 300-1, the water electrolyzer device 300-2, and the water electrolyzer device 300-3 based on the result of monitoring the detection result of the distribution power. ..
Specifically, when the energy management device 100a determines that the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied from the first distribution power to the distribution line DL By subtracting the upper limit value, the first power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 is calculated.
When the energy management device 100a determines that the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100a subtracts the upper limit of the power that can be supplied to the distribution line DL from the second distribution power. Thereby, the second power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 is calculated.
When the energy management device 100a determines that the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100a subtracts the upper limit of the power that can be supplied to the distribution line DL from the third distribution power. Thereby, the third power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 is calculated.

The energy management device 100a can consume all of the power consumption by the water electrolyzer 300 based on the calculated power consumption and the power that can be consumed by the water electrolyzer 300 (hereinafter referred to as "consumable power"). Judge whether or not. Hereinafter, the result of determining whether or not all the power consumption can be consumed by the water electrolyzer 300 is referred to as a power consumption determination result.
Specifically, the energy management device 100a consumes the first power based on the calculated first power consumption and the power that can be consumed by the water electrolyzer 300-1 (hereinafter referred to as "first usable power"). It is determined whether or not all of the above can be consumed by the water electrolyzer 300-1. The energy management device 100a uses water as the second power consumption based on the calculated second power consumption and the power that can be consumed by the water electrolyzer 300-2 (hereinafter referred to as "second usable power"). It is determined whether or not the electrolytic device 300-2 can be consumed. The energy management device 100a uses water as the third power consumption based on the calculated third power consumption and the power that can be consumed by the water electrolyzer 300-3 (hereinafter referred to as "third consumable power"). It is determined whether or not the electrolytic device 300-3 can be consumed.
Specifically, the energy management device 100a determines whether or not the first power consumption exceeds the first usable power. The energy management device 100a determines whether or not the second power consumption exceeds the second usable power. The energy management device 100a determines whether or not the third power consumption exceeds the third consumable power.

The energy management device 100a calculates the power consumption of the water electrolysis device 300 based on the result of monitoring the detection result of the distribution power and the power consumption determination result.
Specifically, when the energy management device 100a determines that the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied from the first distribution power to the distribution line DL By subtracting the upper limit value, the first power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 is calculated.
The energy management device 100a determines whether or not the calculated first power consumption exceeds the first usable power. When the energy management device 100a determines that the first power consumption is equal to or less than the first usable power, the energy management device 100a sets the first power consumption as the power consumption of the water electrolysis device 300-1. On the other hand, when the energy management device 100a determines that the first power consumption exceeds the first usable power, the first usable power is set as the power consumption of the water electrolyzer 300-1. When the energy management device 100a determines that the first power consumption exceeds the first usable power, the power generated by the photovoltaic power generation system 200-1 that limits the supply to the distribution line DL ( Hereinafter referred to as "first power limit") is calculated.

When the energy management device 100a determines that the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100a subtracts the upper limit of the power that can be supplied to the distribution line DL from the second distribution power. Thereby, the second power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 is calculated.
The energy management device 100a determines whether or not the calculated second power consumption exceeds the second usable power. When the energy management device 100a determines that the second power consumption is equal to or less than the second usable power consumption, the energy management device 100a uses the second power consumption as the power consumption of the water electrolysis device 300-2. On the other hand, when the energy management device 100a determines that the second power consumption exceeds the second usable power, the second usable power is set as the power consumption of the water electrolyzer 300-2. When the energy management device 100a determines that the second power consumption exceeds the second usable power, the power generated by the photovoltaic power generation system 200-2 that limits the supply to the distribution line DL ( Hereinafter referred to as "second power limit") is calculated.

When the energy management device 100a determines that the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100a subtracts the upper limit of the power that can be supplied to the distribution line DL from the third distribution power. Thereby, the third power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 is calculated.
The energy management device 100a determines whether or not the calculated third power consumption exceeds the third usable power. When the energy management device 100a determines that the third power consumption is equal to or less than the third usable power, the energy management device 100a uses the third power consumption as the power consumption of the water electrolysis device 300-3. On the other hand, when the energy management device 100a determines that the third power consumption exceeds the third usable power, the third usable power is set as the power consumption of the water electrolyzer 300-3. When the energy management device 100a determines that the third power consumption exceeds the third usable power, the power generated by the photovoltaic power generation system 200-3 that limits the supply to the distribution line DL (the power that limits the supply to the distribution line DL ( Hereinafter referred to as "third power limit") is calculated.

The energy management device 100a derives the first power consumption command value based on the calculated first power consumption. The energy management device 100a acquires the address of the water electrolyzer device 300-1 associated with the identification information of the water electrolyzer device 300-1 from the water electrolyzer device information. The energy management device 100a uses the acquired address of the water electrolyzer device 300-1 as a destination to create water electrolysis device control information including the first power consumption command value. The energy management device 100a transmits the created first water electrolyzer device control information to the water electrolyzer device 300-1.
When the first limit power is calculated, the energy management device 100a derives the first limit command value based on the calculated first limit power. The energy management device 100a acquires the address of the photovoltaic power generation system 200-1 associated with the identification information of the photovoltaic power generation system 200-1 from the photovoltaic power generation system information. The energy management device 100a uses the acquired address of the photovoltaic power generation system 200-1 as a destination to create control information including the first limit command value (hereinafter referred to as “first photovoltaic power generation system control information”). The energy management device 100a transmits the created first photovoltaic power generation system control information to the photovoltaic power generation system 200-1.

The energy management device 100a derives a power consumption command value (hereinafter referred to as "second power consumption command value") for setting the power consumption of the water electrolysis device 300-2 based on the calculated second power consumption. The energy management device 100a acquires the address of the water electrolyzer device 300-2 associated with the identification information of the water electrolyzer device 300-2 from the water electrolyzer device information. The energy management device 100a uses the acquired address of the water electrolyzer device 300-2 as a destination to create control information including the second power consumption command value (hereinafter referred to as "second water electrolyzer device control information"). The energy management device 100a transmits the created second water electrolyzer device control information to the water electrolyzer device 300-2.
When the second limit power is calculated, the energy management device 100a derives the second limit command value based on the calculated second limit power. The energy management device 100a acquires the address of the photovoltaic power generation system 200-2 associated with the identification information of the photovoltaic power generation system 200-2 from the photovoltaic power generation system information. The energy management device 100a uses the acquired address of the photovoltaic power generation system 200-2 as a destination to create control information including the second limit command value (hereinafter referred to as “second photovoltaic power generation system control information”). The energy management device 100a transmits the created second photovoltaic power generation system control information to the photovoltaic power generation system 200-2.

The energy management device 100a derives a power consumption command value (hereinafter referred to as "third power consumption command value") for setting the power consumption of the water electrolysis device 300-3 based on the calculated third power consumption. The energy management device 100a acquires the address of the water electrolyzer device 300-3 associated with the identification information of the water electrolyzer device 300-3 from the water electrolyzer device information. The energy management device 100a uses the acquired address of the water electrolyzer device 300-3 as a destination to create control information including the third power consumption command value (hereinafter referred to as “third water electrolyzer device control information”). The energy management device 100a transmits the created third water electrolyzer device control information to the water electrolyzer device 300-3.
When the energy management device 100a calculates the third limit power, the energy management device 100a derives the third limit command value based on the calculated third limit power. The energy management device 100a acquires the address of the photovoltaic power generation system 200-3 associated with the identification information of the photovoltaic power generation system 200-3 from the photovoltaic power generation system information. The energy management device 100a uses the acquired address of the photovoltaic power generation system 200-3 as a destination to create control information including the third limit command value (hereinafter referred to as “third photovoltaic power generation system control information”). The energy management device 100a transmits the created third photovoltaic power generation system control information to the photovoltaic power generation system 200-3.

The photovoltaic power generation system 200-1 receives the first photovoltaic power generation system control information transmitted by the energy management device 100a. The photovoltaic power generation system 200-1 acquires the first limit command value included in the received first photovoltaic power generation system control information. The photovoltaic power generation system 200-1 limits the electric power supplied to the distribution line DL by the photovoltaic power generation system 200-1 based on the acquired first limit command value.
The photovoltaic power generation system 200-2 receives the second photovoltaic power generation system control information transmitted by the energy management device 100a. The photovoltaic power generation system 200-2 acquires the second limit command value included in the received second photovoltaic power generation system control information. The photovoltaic power generation system 200-2 limits the electric power supplied to the distribution line DL by the photovoltaic power generation system 200-2 based on the acquired second limit command value.
The photovoltaic power generation system 200-3 receives the third photovoltaic power generation system control information transmitted by the energy management device 100a. The photovoltaic power generation system 200-3 acquires the third limit command value included in the received third photovoltaic power generation system control information. The photovoltaic power generation system 200-3 limits the electric power supplied to the distribution line DL by the photovoltaic power generation system 200-3 based on the acquired third limit command value.

Hereinafter, the energy management device 100a included in the energy management system 1a will be described in detail.
FIG. 7 is a block diagram showing an example of an energy management device included in the energy management system according to the first modification of the embodiment. In FIG. 7, in addition to the energy management device 100a, the power sensor 50, the photovoltaic power generation system 200, and the water electrolyzer 300 are shown.
[Energy management device 100a]
The energy management device 100a is realized by a device such as a personal computer, a server, or an industrial computer. The energy management device 100a includes, for example, a communication unit 110, a monitoring unit 120, a calculation unit 130a, a determination unit 135, a creation unit 140a, and a storage unit 150.
In addition to the functions described in the embodiment, the communication unit 110 acquires the photovoltaic power generation system control information output by the creating unit 140a, and transmits the acquired photovoltaic power generation system control information to the photovoltaic power generation system 200.
The storage unit 150 stores the correspondence information 152, the water electrolyzer information 154a, and the photovoltaic power generation system information 156. Correspondence information 152, water electrolyzer information 154a, and photovoltaic power generation system information 156 may be stored in the cloud.

(Water electrolyzer information 154a)
The water electrolyzer information 154a is table-type information in which the water electrolyzer identification information, the available power consumption of the water electrolyzer, and the address of the water electrolyzer are associated with each other. The power that can be consumed by the water electrolyzer is the power that can be consumed by the water electrolyzer. An example of a water electrolyzer address is an IP address.
FIG. 8 is a diagram showing an example of water electrolyzer information. In the water electrolyzer information 154a shown in FIG. 8, the water electrolyzer information 154a includes the water electrolyzer identification information "WE0001", the available power consumption of the water electrolyzer "***", and the water electrolyzer address "AAAAA". Is associated with the water electrolyzer identification information "WE0002", the available power consumption of the water electrolysis device "+++", and the water electrolysis device address "BBBBBB", and the water electrolysis device identification information "WE0003" and water electrolysis. The device's usable power "*++" and the water electrolyzer address "CCCCC" are stored in association with each other. This information is stored when the operation of the energy management system 1a is started.

(Solar power generation system information 156)
The photovoltaic power generation system information 156 is tabular information in which the photovoltaic power generation system identification information and the photovoltaic power generation system address are associated with each other. An example of a photovoltaic system address is an IP address.
FIG. 9 is a diagram showing an example of photovoltaic power generation system information. In the photovoltaic power generation system information 156 shown in FIG. 9, the photovoltaic power generation system information 156 is associated with the photovoltaic power generation system identification information “SPS0001” and the photovoltaic power generation system address “XXXXXX”, and the photovoltaic power generation system The identification information "SPS0002" and the photovoltaic power generation system address "YYYYYY" are associated with each other, and the photovoltaic power generation system identification information "SPS0003" and the photovoltaic power generation system address "ZZZZZZ" are associated and stored. This information is stored when the operation of the energy management system 1a is started. Returning to FIG. 7, the explanation will be continued.

The monitoring unit 120, the calculation unit 130a, the determination unit 135, and the creation unit 140a are realized by, for example, a hardware processor such as a CPU executing a program stored in the storage unit 150. Further, a part or all of these functional parts may be realized by hardware such as LSI, ASIC, FPGA, GPU (circuit part; including circuit unity), or realized by cooperation of software and hardware. May be done. The program may be stored in advance in a storage device (a storage device including a non-transient storage medium) such as an HDD (Hard Disk Drive) or a flash memory, or a removable storage such as a DVD or a CD-ROM. It is stored in a medium (non-transient storage medium), and may be installed by attaching the storage medium to a drive device.

Of the monitoring unit 120, the calculation unit 130a, the determination unit 135, and the creation unit 140a, the calculation unit 130a, the determination unit 135, and the creation unit 140a, which are different from the embodiments, will be mainly described.
The monitoring unit 120 outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130a.
The calculation unit 130a acquires the detection result of the distribution power received by the communication unit 110 when the water electrolyzer identification information output by the monitoring unit 120 and the instruction information are acquired. The calculation unit 130a calculates the power consumption of the water electrolyzer 300 corresponding to the water electrolyzer identification information based on the instruction information. For example, the calculation unit 130a calculates the power consumption of the water electrolyzer 300 by subtracting the upper limit value of the power that can be supplied to the distribution line DL from the detection result of the distribution power. The calculation unit 130a outputs the water electrolyzer identification information and the calculation result of the power consumption of the water electrolyzer 300 to the determination unit 135.

The determination unit 135 acquires the water electrolyzer identification information output by the calculation unit 130a and the calculation result of the power consumption of the water electrolyzer 300. The determination unit 135 acquires the available power consumption of the water electrolyzer stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154a. The determination unit 135 determines whether the power consumption of the water electrolyzer 300 exceeds the power consumption of the water electrolyzer 300 based on the acquired power consumption of the water electrolyzer and the calculation result of the power consumption of the water electrolyzer 300. Judge whether or not. The determination unit 135 determines whether or not the power consumption of the water electrolyzer 300 exceeds the usable power of the water electrolyzer 300, the water electrolyzer identification information, and the calculation result of the power consumption of the water electrolyzer 300. Is output to the calculation unit 130a.

The calculation unit 130a acquires the determination result output by the determination unit 135, the water electrolyzer identification information, and the calculation result of the power consumption of the water electrolyzer 300.
When the acquired determination result indicates that the calculation result of the power consumption of the water electrolysis device 300 is equal to or less than the usable power of the water electrolysis device 300, the calculation unit 130a calculates the power consumption of the water electrolysis device 300. The power consumption of the water electrolyzer 300 is determined. The calculation unit 130a outputs the water electrolyzer identification information and the information indicating the power consumption of the water electrolyzer 300 to the creation unit 140.
When the calculated determination result determines that the power consumption of the water electrolyzer 300 exceeds the power that can be consumed by the water electrolyzer 300, the calculation unit 130a consumes the power that can be consumed by the water electrolyzer 300. Decide on power. The calculation unit 130a outputs the water electrolyzer identification information and the information indicating the power consumption of the water electrolyzer 300 to the creation unit 140a.
The calculation unit 130a acquires the water electrolyzer device consumable power and the water electrolyzer device address stored in association with the water electrolyzer device identification information from the water electrolyzer device information 154a. The calculation unit 130a limits the supply of the power generated by the photovoltaic power generation system 200 to the distribution line DL by subtracting the power consumption of the water electrolyzer from the calculation result of the power consumption of the water electrolyzer 300. Calculate the power limit, which is the power to be used. The calculation unit 130a identifies the photovoltaic power generation system identification information stored in association with the water electrolysis device identification information from the corresponding information 152. The calculation unit 130a outputs the specified photovoltaic power generation system identification information and the information indicating the power limit to the creation unit 140.

Specifically, the calculation unit 130a determines whether or not the power consumption of the water electrolyzer 300-1 output by the determination unit 135 exceeds the usable power of the water electrolyzer 300-1, and the water electrolyzer. The water electrolyzer identification information of 300-1 and the calculation result of the power consumption of the water electrolyzer 300-1 are acquired.
When the acquired determination result indicates that the calculation result of the power consumption of the water electrolysis device 300-1 is equal to or less than the usable power of the water electrolysis device 300-1, the calculation unit 130a of the water electrolysis device 300-1. The calculation result of the power consumption is determined to be the power consumption of the water electrolyzer 300-1. The calculation unit 130a outputs the water electrolysis device identification information of the water electrolysis device 300-1 and the information indicating the power consumption of the water electrolysis device 300-1 to the creation unit 140.
When the calculated determination result determines that the power consumption of the water electrolyzer 300-1 exceeds the power consumption of the water electrolyzer 300-1, the calculation unit 130a determines the power consumption of the water electrolyzer 300-1. The power consumption of the water electrolyzer 300-1 is determined. The calculation unit 130a outputs the water electrolysis device identification information of the water electrolysis device 300-1 and the information indicating the power consumption of the water electrolysis device 300-1 to the creation unit 140a.
The calculation unit 130a includes the available power consumption of the water electrolyzer 300-1 stored in association with the water electrolyzer identification information of the water electrolyzer 300-1 and the address of the water electrolyzer 300-1. Is obtained from the water electrolyzer information 154a. The calculation unit 130a calculates the first power limit by subtracting the power consumption of the water electrolyzer 300-1 from the calculation result of the power consumption of the water electrolyzer 300-1. The calculation unit 130a specifies the photovoltaic power generation system identification information of the photovoltaic power generation system 200-1 stored in association with the water electrolyzer device identification information of the water electrolyzer device 300-1 from the corresponding information 152. The calculation unit 130a outputs the photovoltaic power generation system identification information of the specified photovoltaic power generation system 200-1 and the information indicating the first power limit to the creation unit 140.

The calculation unit 130a determines whether or not the power consumption of the water electrolyzer 300-2 output by the determination unit 135 exceeds the usable power of the water electrolyzer 300-2, and the water electrolyzer 300-2. The electrolyzer identification information and the calculation result of the power consumption of the water electrolyzer 300-2 are acquired.
When the acquired determination result indicates that the calculation result of the power consumption of the water electrolysis device 300-2 is equal to or less than the usable power of the water electrolysis device 300-2, the calculation unit 130a of the water electrolysis device 300-2. The calculation result of the power consumption is determined to be the power consumption of the water electrolyzer 300-2. The calculation unit 130a outputs the water electrolysis device identification information of the water electrolysis device 300-2 and the information indicating the power consumption of the water electrolysis device 300-2 to the creation unit 140.

When the calculated determination result determines that the power consumption of the water electrolyzer 300-2 exceeds the power consumption of the water electrolyzer 300-2, the calculation unit 130a determines the power consumption of the water electrolyzer 300-2. The power consumption of the water electrolyzer 300-2 is determined. The calculation unit 130a outputs the water electrolysis device identification information of the water electrolysis device 300-2 and the information indicating the power consumption of the water electrolysis device 300-2 to the creation unit 140a.
The calculation unit 130a includes the available power consumption of the water electrolyzer 300-2 stored in association with the water electrolyzer identification information of the water electrolyzer 300-2 and the address of the water electrolyzer 300-2. Is obtained from the water electrolyzer information 154a. The calculation unit 130a calculates the second power limit by subtracting the power consumption of the water electrolyzer 300-2 from the calculation result of the power consumption of the water electrolyzer 300-1. The calculation unit 130a identifies the photovoltaic power generation system identification information of the photovoltaic power generation system 200-2 stored in association with the water electrolyzer device identification information of the water electrolyzer device 300-2 from the corresponding information 152. The calculation unit 130a outputs the photovoltaic power generation system identification information of the specified photovoltaic power generation system 200-2 and the information indicating the second limited power to the creating unit 140.

The calculation unit 130a determines whether or not the power consumption of the water electrolyzer 300-3 output by the determination unit 135 exceeds the usable power of the water electrolyzer 300-3, and the water electrolyzer 300-3. The electrolyzer identification information and the calculation result of the power consumption of the water electrolyzer 300-3 are acquired.
When the acquired determination result indicates that the calculation result of the power consumption of the water electrolysis device 300-3 is equal to or less than the usable power of the water electrolysis device 300-3, the calculation unit 130a of the water electrolysis device 300-3. The calculation result of the power consumption is determined to be the power consumption of the water electrolyzer 300-3. The calculation unit 130a outputs the water electrolysis device identification information of the water electrolysis device 300-3 and the information indicating the power consumption of the water electrolysis device 300-3 to the creation unit 140.

When the calculated determination result determines that the power consumption of the water electrolyzer 300-3 exceeds the power consumption of the water electrolyzer 300-3, the calculation unit 130a determines the power consumption of the water electrolyzer 300-3. The power consumption of the water electrolyzer 300-3 is determined. The calculation unit 130a outputs the water electrolysis device identification information of the water electrolysis device 300-3 and the information indicating the power consumption of the water electrolysis device 300-3 to the creation unit 140a.
The calculation unit 130a includes the available power consumption of the water electrolyzer of the water electrolyzer 300-3 and the address of the water electrolyzer of the water electrolyzer 300-3, which are stored in association with the water electrolyzer identification information of the water electrolyzer 300-3. Is obtained from the water electrolyzer information 154a. The calculation unit 130a calculates the third power limit by subtracting the power consumption of the water electrolyzer 300-3 from the calculation result of the power consumption of the water electrolyzer 300-1. The calculation unit 130a specifies the photovoltaic power generation system identification information of the photovoltaic power generation system 200-3 stored in association with the water electrolyzer device identification information of the water electrolyzer device 300-3 from the corresponding information 152. The calculation unit 130a outputs the photovoltaic power generation system identification information of the specified photovoltaic power generation system 200-3 and the information indicating the third limited power to the creating unit 140.

The creating unit 140a acquires the water electrolyzer identification information output by the calculation unit 130a and the information indicating the power consumption of the water electrolyzer 300. The creation unit 140a derives a power consumption command value for instructing the power consumption of the water electrolyzer 300 based on the acquired information indicating the power consumption of the water electrolyzer 300. The creating unit 140a acquires the address of the water electrolyzer 300 stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154a. The creation unit 140a creates the water electrolyzer control information destined for the acquired address of the water electrolyzer 300, including the derived power consumption command value. The creation unit 140a outputs the created water electrolyzer control information to the communication unit 110.
The creation unit 140a acquires the photovoltaic power generation system identification information output by the calculation unit 130a and the calculation result of the power limit. The creation unit 140a derives a limit command value for instructing the limit power of the photovoltaic power generation system 200 based on the acquired calculation result of the limit power of the photovoltaic power generation system 200. For example, a calculation formula for deriving the limit command value is set from the calculation result of the power limit of the photovoltaic power generation system 200, and the creation unit 140a derives the sine command value based on the calculation formula. The creation unit 140a acquires the address of the photovoltaic power generation system 200 stored in association with the acquired photovoltaic power generation system identification information from the photovoltaic power generation system information 156. The creation unit 140a creates the photovoltaic power generation system control information destined for the acquired address of the photovoltaic power generation system 200, including the derived limit command value. The creation unit 140a outputs the created photovoltaic power generation system control information to the communication unit 110.

Specifically, the creating unit 140a acquires the water electrolyzer identification device identification information of the water electrolyzer device 300-1 output by the determination unit 135 and the information indicating the power consumption of the water electrolyzer device 300-1. The creating unit 140a derives the first power consumption command value based on the acquired information indicating the power consumption of the water electrolyzer 300-1. The creating unit 140a acquires the address of the water electrolyzer 300-1 stored in association with the acquired water electrolyzer identification information of the water electrolyzer 300-1 from the water electrolyzer information 154a. The creation unit 140a creates the first water electrolyzer control information destined for the acquired address of the water electrolyzer 300-1 including the derived first power consumption command value. The creation unit 140a outputs the created first water electrolyzer control information to the communication unit 110.
The creation unit 140a acquires the photovoltaic power generation system identification information of the photovoltaic power generation system 200-1 output by the calculation unit 130a and the calculation result of the first limit power. The creation unit 140a derives the first limit command value based on the acquired calculation result of the first limit power. The creation unit 140a acquires the address of the photovoltaic power generation system 200-1 stored in association with the acquired photovoltaic power generation system identification information of the photovoltaic power generation system 200-1 from the photovoltaic power generation system information 156. The creation unit 140a creates the first photovoltaic power generation system control information destined for the acquired address of the photovoltaic power generation system 200-1 including the derived first restriction command value. The creation unit 140a outputs the created first photovoltaic power generation system control information to the communication unit 110.

The creating unit 140a acquires the water electrolyzer identification device identification information of the water electrolyzer device 300-2 output by the determination unit 135 and the information indicating the power consumption of the water electrolyzer device 300-2. The creating unit 140a derives the second power consumption command value based on the acquired information indicating the power consumption of the water electrolyzer 300-2. The creating unit 140a acquires the address of the water electrolyzer 300-2 stored in association with the acquired water electrolyzer identification information of the water electrolyzer 300-2 from the water electrolyzer information 154a. The creation unit 140a creates the second water electrolyzer control information destined for the acquired address of the water electrolyzer 300-2, including the derived second power consumption command value. The creation unit 140a outputs the created second water electrolyzer control information to the communication unit 110.
The creation unit 140a acquires the photovoltaic power generation system identification information of the photovoltaic power generation system 200-2 output by the calculation unit 130a and the calculation result of the second limit power. The creation unit 140a derives the second limit command value based on the acquired calculation result of the second limit power. The creation unit 140a acquires the address of the photovoltaic power generation system 200-2 stored in association with the acquired photovoltaic power generation system identification information of the photovoltaic power generation system 200-2 from the photovoltaic power generation system information 156. The creation unit 140a creates the second photovoltaic power generation system control information destined for the acquired address of the photovoltaic power generation system 200-2, including the derived second restriction command value. The creation unit 140a outputs the created second photovoltaic power generation system control information to the communication unit 110.

The creating unit 140a acquires the water electrolyzer identification device identification information of the water electrolyzer device 300-3 output by the determination unit 135 and the information indicating the power consumption of the water electrolyzer device 300-3. The creating unit 140a derives a third power consumption command value based on the acquired information indicating the power consumption of the water electrolyzer 300-3. The creating unit 140a acquires the address of the water electrolyzer 300-3 stored in association with the acquired water electrolyzer identification information of the water electrolyzer 300-3 from the water electrolyzer information 154a. The creation unit 140a creates the third water electrolyzer control information destined for the acquired address of the water electrolyzer 300-3, including the derived third power consumption command value. The creation unit 140a outputs the created third water electrolyzer control information to the communication unit 110.
The creation unit 140a acquires the photovoltaic power generation system identification information of the photovoltaic power generation system 200-3 output by the calculation unit 130a and the calculation result of the third limit power. The creation unit 140a derives the third limit command value based on the acquired calculation result of the third limit power. The creation unit 140a acquires the address of the photovoltaic power generation system 200-3 stored in association with the acquired photovoltaic power generation system identification information of the photovoltaic power generation system 200-3 from the photovoltaic power generation system information 156. The creation unit 140a creates the third photovoltaic power generation system control information destined for the acquired address of the photovoltaic power generation system 200-3, including the derived third restriction command value. The creation unit 140a outputs the created third photovoltaic power generation system control information to the communication unit 110.

(Operation of energy management system)
FIG. 10 is a sequence chart showing an example of the operation of the energy management system according to the first modification of the embodiment.
From step S1-2 to step S4-2, steps S1-1 to S4-1 of FIG. 6 can be applied.
(Step S5-2)
In the energy management device 100a, the monitoring unit 120 calculates the water electrolyzer identification information and the created instruction information when it is determined that the distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL. Output to 130a.
The calculation unit 130a acquires the detection result of the distribution power received by the communication unit 110 when the water electrolyzer identification information output by the monitoring unit 120 and the instruction information are acquired. The calculation unit 130a calculates the power consumption of the water electrolyzer 300 corresponding to the acquired water electrolyzer identification information based on the upper limit of the power that can be supplied to the distribution line DL and the detection result of the acquired distribution power. .. The calculation unit 130a outputs the water electrolyzer identification information and the calculation result of the power consumption of the water electrolyzer 300 to the determination unit 135.
The determination unit 135 acquires the water electrolyzer identification information output by the calculation unit 130a and the calculation result of the power consumption of the water electrolyzer 300. The determination unit 135 acquires the available power consumption of the water electrolyzer stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154a. The determination unit 135 determines whether the power consumption of the water electrolyzer 300 exceeds the power consumption of the water electrolyzer 300 based on the acquired power consumption of the water electrolyzer and the calculation result of the power consumption of the water electrolyzer 300. Judge whether or not.
In the energy management device 100a, the determination unit 135 determines whether or not the power consumption of the water electrolysis device 300 exceeds the power consumption of the water electrolysis device 300, the water electrolysis device identification information, and the water electrolysis device 300. The calculation result of the power consumption is output to the calculation unit 130a. The calculation unit 130a acquires the determination result output by the determination unit 135, the water electrolyzer identification information, and the calculation result of the power consumption of the water electrolyzer 300.

(Step S6-2)
In the energy management device 100a, the calculation unit 130a indicates that the acquired determination result indicates that the calculation result of the power consumption of the water electrolysis device 300 is equal to or less than the power consumption of the water electrolysis device 300. The calculation result of the power consumption is determined to be the power consumption of the water electrolyzer 300.
(Step S7-2)
In the energy management device 100a, the calculation unit 130a outputs the water electrolysis device identification information and the information indicating the power consumption of the water electrolysis device 300 to the creation unit 140a. The creating unit 140a acquires the water electrolyzer identification information output by the calculation unit 130a and the information indicating the power consumption of the water electrolyzer 300. The creating unit 140a derives the power consumption command value based on the acquired information indicating the power consumption of the water electrolyzer 300. The creating unit 140a acquires the address of the water electrolyzer 300 stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154a. The creation unit 140a creates the water electrolyzer control information destined for the acquired address of the water electrolyzer 300, including the derived power consumption command value. The creation unit 140a outputs the created water electrolyzer control information to the communication unit 110.

(Step S8-2)
In the energy management device 100a, the calculation unit 130a determines the power consumption of the water electrolyzer 300 when the acquired determination result determines that the power consumption of the water electrolyzer 300 exceeds the power consumption of the water electrolyzer 300. The power consumption of the water electrolyzer 300 is determined.
(Step S9-2)
In the energy management device 100a, the calculation unit 130a outputs the water electrolysis device identification information and the information indicating the power consumption of the water electrolysis device 300 to the creation unit 140a. The creating unit 140a acquires the water electrolyzer identification information output by the calculation unit 130a and the information indicating the power consumption of the water electrolyzer 300. The creating unit 140a derives the power consumption command value based on the acquired information indicating the power consumption of the water electrolyzer 300. The creating unit 140a acquires the address of the water electrolyzer 300 stored in association with the acquired water electrolyzer identification information from the water electrolyzer information 154a. The creation unit 140a creates the water electrolyzer control information destined for the acquired address of the water electrolyzer 300, including the derived power consumption command value. The creation unit 140a outputs the created water electrolyzer control information to the communication unit 110.
(Step S10-2)
In the energy management device 100a, the communication unit 110 acquires the water electrolyzer control information output by the creation unit 140a, and transmits the acquired water electrolyzer control information to the water electrolyzer 300.

(Step S11-2)
The water electrolyzer 300 receives the water electrolyzer control information transmitted by the energy management device 100a.
(Step S12-2)
The water electrolyzer 300 acquires the power consumption command value included in the received water electrolyzer control information. The water electrolyzer 300 controls the power consumption based on the acquired power consumption command value. For example, the water electrolyzer 300 consumes electric power based on the power consumption command value from the electric power supplied to the distribution line DL by the photovoltaic power generation system 200.
(Step S13-2)
In the energy management device 100a, the calculation unit 130a acquires the water electrolyzer device consumable power and the water electrolyzer device address stored in association with the water electrolyzer device identification information from the water electrolyzer device information 154a. The calculation unit 130a calculates the power limit by subtracting the power consumption of the water electrolyzer from the calculation result of the power consumption of the water electrolyzer 300. The calculation unit 130a identifies the photovoltaic power generation system identification information stored in association with the water electrolysis device identification information from the corresponding information 152. The calculation unit 130a outputs the specified photovoltaic power generation system identification information and the information indicating the power limit to the creation unit 140.

(Step S14-2)
In the energy management device 100a, the creation unit 140a acquires the photovoltaic power generation system identification information output by the calculation unit 130a and the calculation result of the power limit. The creation unit 140a derives a limit command value based on the acquired calculation result of the limit power of the photovoltaic power generation system 200. The creation unit 140a acquires the address of the photovoltaic power generation system 200 stored in association with the acquired photovoltaic power generation system identification information from the photovoltaic power generation system information 156. The creation unit 140a creates the photovoltaic power generation system control information destined for the acquired address of the photovoltaic power generation system 200, including the derived limit command value. The creation unit 140a outputs the created photovoltaic power generation system control information to the communication unit 110.

(Step S15-2)
In the energy management device 100a, the communication unit 110 acquires the photovoltaic power generation system control information output by the creating unit 140a, and transmits the acquired photovoltaic power generation system control information to the photovoltaic power generation system 200.
(Step S16-2)
The photovoltaic power generation system 200 receives the photovoltaic power generation system control information transmitted by the energy management device 100a.
(Step S17-2)
The photovoltaic power generation system 200 acquires the limit command value included in the received photovoltaic power generation system control information. The photovoltaic power generation system 200 limits the electric power supplied to the distribution line DL by the photovoltaic power generation system 200 based on the acquired limit command value.
In the sequence chart shown in FIG. 10, the order of steps S6-2 to S12-2 and steps S13-2 to S17-2 may be changed.

The features of the first modification of the above-described embodiment may be applied to the energy management system 1'of the embodiment shown in FIG. 1B.
According to the energy management system 1a of the first modification of the present embodiment, the energy management system 1a is an energy management system including a photovoltaic power generation system 200 connected to the distribution line DL and a water electrolysis device 300. , The monitoring unit 120 that monitors the distribution power, which is the power supplied between the connection point of the photovoltaic power generation system 200 in the distribution line DL and the connection point of the water electrolyzer 300, and the power supplied to the distribution line DL. The power consumption command value is derived and the derived power consumption is derived based on the power consumption calculated by the calculation unit 130a that calculates the power consumption of the water electrolyzer 300 based on the threshold value and the distribution power of. It is provided with a creation unit 140a for creating water electrolysis device control information for controlling the water electrolysis device 300 including a command value.
Further, a determination unit 135 for determining whether or not the power consumption calculated by the calculation unit 130a exceeds the power that can be consumed by the water electrolysis device 300 is further provided, and the creation unit 140a is based on the result of determination by the determination unit 135. Therefore, a limit command value for limiting the output of the photovoltaic power generation system 200 is derived, and control information for limiting the power supplied by the photovoltaic power generation system 200 including the derived limit command value is created.

With this configuration, when the power consumption of the water electrolyzer 300 exceeds the power that can be consumed by the water electrolyzer 300, a limit command value for limiting the output of the photovoltaic power generation system 200 is derived. Since control information for limiting the power supplied by the photovoltaic power generation system 200 including the derived limit command value can be created, among the power supplies supplied to the distribution line DL by the photovoltaic power generation system 200, the energy consumer CE Can control the power supplied to. In the distribution line DL, renewable energy can be introduced into the local grid (distribution line) by strengthening the space between the connection point of the photovoltaic power generation system 200 and the connection point of the water electrolysis device 300. When introducing renewable energy into the local grid (distribution line), it is possible to limit the points where the distribution line DL is reinforced. Renewable energy that does not generate carbon dioxide can be introduced into the local grid (distribution line). As a result, the utilization rate of the power grid and the load factor of the energy consumer CE can be improved.

(Second modification)
FIG. 11 is a diagram showing an outline of an energy management system according to a second modification of the embodiment. In the energy management system 1b of the second modification of the embodiment, the power sensor 50-1, the power sensor 50-2, and the power sensor 50-3 are omitted as compared with the energy management system of the embodiment. The energy management system 1b of the second modification of the embodiment includes an energy management device 100b instead of the energy management device 100 as compared with the energy management system of the embodiment.
The energy management device 100b estimates the distribution power. The energy management device 100b monitors whether or not the estimated result of the distributed power exceeds the threshold value of the power based on the estimated result of the distributed power. In the second modification of the present embodiment, the case where the upper limit value of the distribution power that can be supplied to the distribution line DL is applied as an example of the power threshold value will be continued. The upper limit of the distribution power that can be supplied to the distribution line DL is set in advance when the power system is introduced.
Specifically, the energy management device 100b estimates the first distribution power, and based on the estimation result of the first distribution power, the estimation result of the first distribution power is the upper limit value of the power that can be supplied to the distribution line DL. Monitor whether it exceeds. The energy management device 100b estimates the second distribution power, and based on the estimation result of the second distribution power, whether or not the estimation result of the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL. To monitor. The energy management device 100b estimates the third distribution power, and based on the estimation result of the third distribution power, whether or not the estimated value of the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL. To monitor.

The energy management device 100b calculates the power consumption of each of the water electrolyzer device 300-1, the water electrolyzer device 300-2, and the water electrolyzer device 300-3 based on the estimation result of the distribution power. In particular,
When the energy management device 100b determines that the estimation result of the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied to the distribution line DL from the estimation result of the first distribution power. By subtracting the upper limit value of, the first power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 is calculated.
When the energy management device 100b determines that the estimation result of the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied to the distribution line DL from the estimation result of the second distribution power. By subtracting the upper limit value of, the second power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 is calculated.
When the energy management device 100b determines that the estimation result of the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied to the distribution line DL from the estimation result of the third distribution power. By subtracting the upper limit value of, the third power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 is calculated.

The energy management device 100b derives the first power consumption command value based on the calculated first power consumption. The energy management device 100b acquires the address of the water electrolyzer device 300-1 associated with the identification information of the water electrolyzer device 300-1 from the water electrolyzer device information. The energy management device 100b uses the acquired address of the water electrolyzer device 300-1 as a destination to create water electrolysis device control information including the first power consumption command value. The energy management device 100b transmits the created first water electrolyzer device control information to the water electrolyzer device 300-1.
The energy management device 100b derives the second power consumption command value based on the calculated second power consumption. The energy management device 100b acquires the address of the water electrolyzer device 300-2 associated with the identification information of the water electrolyzer device 300-2 from the water electrolyzer device information. The energy management device 100b uses the acquired address of the water electrolyzer device 300-2 as a destination to create water electrolysis device control information including the second power consumption command value. The energy management device 100b transmits the created second water electrolyzer device control information to the water electrolyzer device 300-2.
The energy management device 100b derives a third power consumption command value based on the calculated third power consumption. The energy management device 100b acquires the address of the water electrolyzer device 300-3 associated with the identification information of the water electrolyzer device 300-3 from the water electrolyzer device information. The energy management device 100b uses the acquired address of the water electrolyzer device 300-3 as a destination to create water electrolysis device control information including the third power consumption command value. The energy management device 100b transmits the created third water electrolyzer device control information to the water electrolyzer device 300-3.

Hereinafter, the energy management device 100b included in the energy management system 1b will be described in detail.
FIG. 12 is a block diagram showing an example of an energy management device included in the energy management system according to the second modification of the embodiment. FIG. 12 shows a water electrolyzer 300 in addition to the energy management device 100b.
[Energy management device 100b]
The energy management device 100b is realized by a device such as a personal computer, a server, or an industrial computer. The energy management device 100b includes, for example, a communication unit 110, an estimation unit 115, a monitoring unit 120, a calculation unit 130, a creation unit 140, and a storage unit 150.
The storage unit 150 stores the correspondence information 152b and the water electrolyzer information 154. Correspondence information 152b and water electrolyzer information 154 may be stored in the cloud.

(Correspondence information 152b)
Correspondence information 152b is table-type information in which the photovoltaic power generation system identification information and the water electrolysis device identification information are associated with each other. Here, in the correspondence information 152b, the photovoltaic power generation system 200 and the water electrolyzer 300 installed in the vicinity of the energy consumer CE that mainly uses the electric power supplied by the photovoltaic power generation system 200 are associated with each other.
FIG. 13 is a diagram showing an example of correspondence information. The correspondence information 152b shown in FIG. 13 is associated with the photovoltaic power generation system identification information “PV0001” and the water electrolysis device identification information “WE0001”, and the photovoltaic power generation system identification information “PV0002” and the water electrolysis device identification information “PV0001” are associated with each other. The information "WE0002" is associated with the photovoltaic power generation system identification information "PV0003", and the water electrolysis device identification information "WE0003" is associated and stored. This information is stored when the operation of the energy management system 1b is started. Returning to FIG. 12, the description will be continued.

The estimation unit 115, the monitoring unit 120, the calculation unit 130, and the creation unit 140 are realized by, for example, a hardware processor such as a CPU executing a program stored in the storage unit 150. Further, a part or all of these functional parts may be realized by hardware such as LSI, ASIC, FPGA, GPU (circuit part; including circuit unity), or realized by cooperation of software and hardware. May be done. The program may be stored in advance in a storage device (a storage device including a non-transient storage medium) such as an HDD (Hard Disk Drive) or a flash memory, or a removable storage such as a DVD or a CD-ROM. It is stored in a medium (non-transient storage medium), and may be installed by attaching the storage medium to a drive device.

Of the estimation unit 115, the monitoring unit 120b, the calculation unit 130, and the call creation unit 140a, the estimation unit 115 and the monitoring unit 120, which are different from the embodiments, will be mainly described.
The estimation unit 115 estimates the distribution power. For example, the estimation unit 115 holds weather-state power generation correspondence information, which is information in which information indicating the weather state and information indicating the power generated by the photovoltaic power generation system 200 are associated with each other. Image information that captures an image of the environment in which the photovoltaic power generation system 200 is installed is input to the estimation unit 115 by an image pickup unit (not shown). The estimation unit 115 estimates the weather condition based on the image information input by the imaging unit. The estimation unit 115 acquires the power generated by the photovoltaic power generation system 200 associated with the estimation result of the weather condition from the weather condition power generation power correspondence information, and obtains the power generated by the photovoltaic power generation system 200 obtained. It is the estimation result of the distributed power. The estimation unit 115 outputs the estimation result of the distribution power to the monitoring unit 120b.

Specifically, the estimation unit 115 holds the first weather state generated power correspondence information, which is information in which the information indicating the weather state and the information indicating the power generated by the photovoltaic power generation system 200-1 are associated with each other. There is. Image information that captures an image of the environment in which the photovoltaic power generation system 200-1 is installed is input to the estimation unit 115 by the image pickup unit. The estimation unit 115 estimates the weather condition based on the image information input by the imaging unit. The estimation unit 115 acquires the power generated by the photovoltaic power generation system 200-1 associated with the estimation result of the weather condition from the first weather condition power generation power correspondence information, and acquires the photovoltaic power generation system 200-1. The power generated by is used as the estimation result of the first distribution power. The estimation unit 115 outputs the estimation result of the first distribution power to the monitoring unit 120b.

The estimation unit 115 holds the second weather state generated power correspondence information, which is information in which the information indicating the weather state and the information indicating the power generated by the photovoltaic power generation system 200-2 are associated with each other. Image information that captures an image of the environment in which the photovoltaic power generation system 200-2 is installed is input to the estimation unit 115 by the image pickup unit. The estimation unit 115 estimates the weather condition based on the image information input by the imaging unit. The estimation unit 115 acquires the power generated by the photovoltaic power generation system 200-2 associated with the estimation result of the weather condition from the second weather condition power generation power correspondence information, and acquires the photovoltaic power generation system 200-2. The power generated by is used as the estimation result of the second distribution power. The estimation unit 115 outputs the estimation result of the second distribution power to the monitoring unit 120b.
The estimation unit 115 holds the third weather state generated power correspondence information, which is information in which the information indicating the weather state and the information indicating the power generated by the photovoltaic power generation system 200-3 are associated with each other. Image information that captures an image of the environment in which the photovoltaic power generation system 200-3 is installed is input to the estimation unit 115 by the image pickup unit. The estimation unit 115 estimates the weather condition based on the image information input by the imaging unit. The estimation unit 115 acquires the power generated by the photovoltaic power generation system 200-3 associated with the estimation result of the weather condition from the third weather condition power generation power correspondence information, and acquires the photovoltaic power generation system 200-3. The power generated by is used as the estimation result of the third distribution power. The estimation unit 115 outputs the estimation result of the third distribution power to the monitoring unit 120b.

The monitoring unit 120b acquires the estimation result of the distribution power output by the estimation unit 115. Based on the acquired distribution power estimation result, the monitoring unit 120b monitors whether or not the distribution power estimation result exceeds the upper limit of the power that can be supplied to the distribution line DL. When the monitoring unit 120b determines that the estimation result of the distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the monitoring unit 120b uses the photovoltaic power generation system identification information of the photovoltaic power generation system 200 that supplies the distribution power. The associated and stored water electrolyzer identification information is specified from the corresponding information 152b. By specifying the water electrolyzer identification information, the water electrolyzer 300 to be controlled can be specified. The monitoring unit 120b creates instruction information for calculating the power consumption of the water electrolyzer 300 corresponding to the specified water electrolyzer identification information. The monitoring unit 120b outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130.
Specifically, the monitoring unit 120b monitors whether or not the estimation result of the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL based on the acquired estimation result of the first distribution power. do. When the monitoring unit 120b determines that the estimation result of the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the solar power generation system 200-1 that supplies the first distribution power is the sun. The water electrolyzer identification information stored in association with the photovoltaic power generation system identification information is specified from the correspondence information 152b. By specifying the water electrolyzer identification information, the water electrolyzer 300-1 to be controlled can be specified. The monitoring unit 120b creates instruction information for calculating the power consumption of the water electrolyzer 300-1 corresponding to the specified water electrolyzer identification information. The monitoring unit 120b outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130.

Based on the acquired estimation result of the second distribution power, the monitoring unit 120b monitors whether or not the estimation result of the second distribution power exceeds the upper limit value of the power that can be supplied to the distribution line DL. When the monitoring unit 120b determines that the estimation result of the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the solar power generation system 200-2 that supplies the second distribution power is the sun. The water electrolyzer identification information stored in association with the photovoltaic power generation system identification information is specified from the correspondence information 152b. By specifying the water electrolyzer identification information, the water electrolyzer 300-2 to be controlled can be specified. The monitoring unit 120b creates instruction information for calculating the power consumption of the water electrolyzer 300-2 corresponding to the specified water electrolyzer identification information. The monitoring unit 120b outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130.
The monitoring unit 120b monitors whether or not the estimated value of the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL based on the acquired estimation result of the third distribution power. When the monitoring unit 120b determines that the estimation result of the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the solar power generation system 200-3 that supplies the third distribution power is the sun. The water electrolyzer identification information stored in association with the photovoltaic power generation system identification information is specified from the correspondence information 152b. By specifying the water electrolyzer identification information, the water electrolyzer 300-3 to be controlled can be specified. The monitoring unit 120b creates instruction information for calculating the power consumption of the water electrolyzer 300-3 corresponding to the specified water electrolyzer identification information. The monitoring unit 120b outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130.

Next, the operation of the energy management system will be described.
(Operation of energy management system)
FIG. 14 is a sequence chart showing an example of the operation of the energy management system according to the second modification of the embodiment.
(Step S1-3)
In the energy management device 100b, the estimation unit 115 estimates the distribution power. The estimation unit 115 outputs the estimation result of the distribution power to the monitoring unit 120b.
(Step S2-3)
In the energy management device 100b, the monitoring unit 120b acquires the estimation result of the distribution power output by the estimation unit 115. Based on the acquired distribution power estimation result, the monitoring unit 120b monitors whether or not the distribution power estimation result exceeds the upper limit of the power that can be supplied to the distribution line DL. When the monitoring unit 120b determines that the estimation result of the distribution power does not exceed the upper limit of the power that can be supplied to the distribution line DL, the process proceeds to step S1-3. In this case, the power consumption of the water electrolyzer 300 is not controlled.
(Step S3-3)
In the energy management device 100b, when the monitoring unit 120b determines that the estimation result of the distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the solar power generation system 200 that supplies the distribution power is the sun. The water electrolyzer identification information stored in association with the photovoltaic system identification information is specified from the correspondence information 152b. By specifying the water electrolyzer identification information, the water electrolyzer 300 to be controlled can be specified. The monitoring unit 120b creates instruction information for calculating the power consumption of the water electrolyzer 300 corresponding to the specified water electrolyzer identification information. The monitoring unit 120b outputs the water electrolyzer identification information and the created instruction information to the calculation unit 130.
From step S4-3 to step S8-3, steps S6-1 to S10-1 described with reference to FIG. 6 can be applied.

In the energy management system 1b of the second modification of the present embodiment, in the energy management device 100b, the estimation unit 115 estimates the weather condition based on the image information input by the imaging unit, and the estimation result of the weather condition. The case where the amount of power generated by the photovoltaic power generation system 200 associated with the above is acquired from the weather condition power generation power correspondence information has been described, but the present invention is not limited to this example. For example, the estimation unit 115 acquires weather information from the outside, and based on the acquired weather information, calculates the amount of power generated by the photovoltaic power generation system 200 associated with the weather condition from the weather condition power generation power correspondence information. You may get it.
The features of the energy management system 1b of the second modification of the present embodiment may be applied to the energy management system 1a of the second modification of the embodiment. That is, the energy management device 100a described with reference to FIG. 7 includes an estimation unit 115, and a monitoring unit 120b instead of the monitoring unit 120. In this case, the energy management device 100a estimates the distributed power. The energy management device 100a monitors whether or not the estimated result of the distributed power exceeds the threshold value of the power based on the estimated result of the distributed power. Specifically, the energy management device 100a estimates the first distribution power, and based on the estimation result of the first distribution power, the estimation result of the first distribution power is the upper limit value of the power that can be supplied to the distribution line DL. Monitor whether it exceeds. The energy management device 100a estimates the second distribution power, and based on the estimation result of the second distribution power, whether or not the estimation result of the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL. To monitor. The energy management device 100a estimates the third distribution power, and based on the estimation result of the third distribution power, whether or not the estimated value of the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL. To monitor.

The energy management device 100a calculates the power consumption of each of the water electrolyzer device 300-1, the water electrolyzer device 300-2, and the water electrolyzer device 300-3 based on the estimation result of the distribution power. Specifically, when the energy management device 100a determines that the estimation result of the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the distribution line DL is determined from the estimation result of the first distribution power. The first power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 is calculated by subtracting the upper limit of the power that can be supplied to the power generation system 200-1. When the energy management device 100a determines that the estimation result of the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied to the distribution line DL from the estimation result of the second distribution power. By subtracting the upper limit value of, the second power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 is calculated. When the energy management device 100a determines that the estimation result of the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied to the distribution line DL from the estimation result of the third distribution power. By subtracting the upper limit value of, the third power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 is calculated.

The energy management device 100a determines whether or not all of the power consumption can be consumed by the water electrolyzer 300 based on the calculated power consumption and the power that can be consumed by the water electrolyzer 300. Specifically, whether or not the energy management device 100a can consume all of the first power consumption by the water electrolyzer 300-1 based on the calculated first power consumption and the first consumable power. Is determined. The energy management device 100a determines whether or not all of the second power consumption can be consumed by the water electrolyzer 300-2 based on the calculated second power consumption and the second usable power. The energy management device 100a determines whether or not all of the third power consumption can be consumed by the water electrolyzer 300-3 based on the calculated third power consumption and the third usable power.
Specifically, the energy management device 100a determines whether or not the first power consumption exceeds the first usable power. The energy management device 100a determines whether or not the second power consumption exceeds the second usable power. The energy management device 100a determines whether or not the third power consumption exceeds the third consumable power.

The energy management device 100a calculates the power consumption of the water electrolysis device 300 based on the result of monitoring the detection result of the distribution power and the power consumption determination result.
Specifically, when the energy management device 100a determines that the first distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the power that can be supplied from the first distribution power to the distribution line DL By subtracting the upper limit value, the first power consumption of the water electrolyzer 300-1 associated with the photovoltaic power generation system 200-1 is calculated.
The energy management device 100a determines whether or not the calculated first power consumption exceeds the first usable power. When the energy management device 100a determines that the first power consumption is equal to or less than the first usable power, the energy management device 100a sets the first power consumption as the power consumption of the water electrolysis device 300-1. On the other hand, when the energy management device 100a determines that the first power consumption exceeds the first usable power, the first usable power is set as the power consumption of the water electrolyzer 300-1. The energy management device 100a calculates the first limited power out of the power generated by the photovoltaic power generation system 200-1 when it is determined that the first power consumption exceeds the first usable power.

When the energy management device 100a determines that the second distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100a subtracts the upper limit of the power that can be supplied to the distribution line DL from the second distribution power. Thereby, the second power consumption of the water electrolyzer 300-2 associated with the photovoltaic power generation system 200-2 is calculated. The energy management device 100a determines whether or not the calculated second power consumption exceeds the second usable power. When the energy management device 100a determines that the second power consumption is equal to or less than the second usable power consumption, the energy management device 100a uses the second power consumption as the power consumption of the water electrolysis device 300-2. On the other hand, when the energy management device 100a determines that the second power consumption exceeds the second usable power, the second usable power is set as the power consumption of the water electrolyzer 300-2. The energy management device 100a calculates the second limited power out of the power generated by the photovoltaic power generation system 200-2 when it is determined that the second power consumption exceeds the second usable power.

When the energy management device 100a determines that the third distribution power exceeds the upper limit of the power that can be supplied to the distribution line DL, the energy management device 100a subtracts the upper limit of the power that can be supplied to the distribution line DL from the third distribution power. Thereby, the third power consumption of the water electrolyzer 300-3 associated with the photovoltaic power generation system 200-3 is calculated. The energy management device 100a determines whether or not the calculated third power consumption exceeds the third usable power. When the energy management device 100a determines that the third power consumption is equal to or less than the third usable power, the energy management device 100a uses the third power consumption as the power consumption of the water electrolysis device 300-3. On the other hand, when the energy management device 100a determines that the third power consumption exceeds the third usable power, the third usable power is set as the power consumption of the water electrolyzer 300-3. The energy management device 100a calculates the third limited power out of the power generated by the photovoltaic power generation system 200-3 when it is determined that the third power consumption exceeds the third usable power.

The energy management device 100a derives the first power consumption command value based on the calculated first power consumption. The energy management device 100a acquires the address of the water electrolyzer device 300-1 associated with the identification information of the water electrolyzer device 300-1 from the water electrolyzer device information. The energy management device 100a uses the acquired address of the water electrolyzer device 300-1 as a destination to create water electrolysis device control information including the first power consumption command value. The energy management device 100a transmits the created first water electrolyzer device control information to the water electrolyzer device 300-1.
When the first limit power is calculated, the energy management device 100a derives the first limit command value based on the calculated first limit power. The energy management device 100a acquires the address of the photovoltaic power generation system 200-1 associated with the identification information of the photovoltaic power generation system 200-1 from the photovoltaic power generation system information. The energy management device 100a uses the acquired address of the photovoltaic power generation system 200-1 as a destination to create the first photovoltaic power generation system control information including the first limit command value. The energy management device 100a transmits the created first photovoltaic power generation system control information to the photovoltaic power generation system 200-1.

The energy management device 100a derives a second power consumption command value for setting the power consumption of the water electrolysis device 300-2 based on the calculated second power consumption. The energy management device 100a acquires the address of the water electrolyzer device 300-2 associated with the identification information of the water electrolyzer device 300-2 from the water electrolyzer device information. The energy management device 100a uses the acquired address of the water electrolyzer device 300-2 as a destination to create the second water electrolyzer device control information including the second power consumption command value. The energy management device 100a transmits the created second water electrolyzer device control information to the water electrolyzer device 300-2.
When the second limit power is calculated, the energy management device 100a derives the second limit command value based on the calculated second limit power. The energy management device 100a acquires the address of the photovoltaic power generation system 200-2 associated with the identification information of the photovoltaic power generation system 200-2 from the photovoltaic power generation system information. The energy management device 100a uses the acquired address of the photovoltaic power generation system 200-2 as a destination to create the second photovoltaic power generation system control information including the second limit command value. The energy management device 100a transmits the created second photovoltaic power generation system control information to the photovoltaic power generation system 200-2.

The energy management device 100a derives a third power consumption command value for setting the power consumption of the water electrolysis device 300-3 based on the calculated third power consumption. The energy management device 100a acquires the address of the water electrolyzer device 300-3 associated with the identification information of the water electrolyzer device 300-3 from the water electrolyzer device information. The energy management device 100a uses the acquired address of the water electrolyzer device 300-3 as a destination to create control information including the third power consumption command value (hereinafter referred to as “third water electrolyzer device control information”). The energy management device 100a transmits the created third water electrolyzer device control information to the water electrolyzer device 300-3.
When the energy management device 100a calculates the third limit power, the energy management device 100a derives the third limit command value based on the calculated third limit power. The energy management device 100a acquires the address of the photovoltaic power generation system 200-3 associated with the identification information of the photovoltaic power generation system 200-3 from the photovoltaic power generation system information. The energy management device 100a uses the acquired address of the photovoltaic power generation system 200-3 as a destination to create the third photovoltaic power generation system control information including the third limit command value. The energy management device 100a transmits the created third photovoltaic power generation system control information to the photovoltaic power generation system 200-3.

According to the energy management system 1b of the second modification of the present embodiment, the energy management system 1b is an energy management system including a photovoltaic power generation system 200 connected to the distribution line DL and a water electrolysis device 300. , The monitoring unit 120b that monitors the distribution power, which is the power supplied between the connection point of the photovoltaic power generation system 200 in the distribution line DL and the connection point of the water electrolyzer 300, and the power supplied to the distribution line DL. The power consumption command value is derived based on the calculation unit 130 that calculates the power consumption of the water electrolyzer 300 based on the threshold value and the power distribution power, and the power consumption calculated by the calculation unit 130, and the derived power consumption. It is provided with a creation unit 140 for creating water electrolysis device control information for controlling the water electrolysis device 300 including a command value.
Further, an estimation unit 115 for estimating the distribution power is further provided, and the monitoring unit 120b monitors the distribution power estimated by the estimation unit 115.

With this configuration, the energy management device 100b can estimate the power distribution. Even if the energy management system 1b is not provided with the power sensor 50, the power consumption of the water electrolyzer 300 can be controlled based on the estimated value of the distribution power and the threshold value of the power supplied to the distribution line DL. The photovoltaic power generation system 200 can control the electric power supplied to the energy consumer CE among the electric power supplied to the distribution line DL. In the distribution line DL, renewable energy can be introduced into the local grid (distribution line) by strengthening the space between the connection point of the photovoltaic power generation system 200 and the connection point of the water electrolysis device 300. When introducing renewable energy into the local grid (distribution line), it is possible to limit the points where the distribution line DL is reinforced. Renewable energy that does not generate carbon dioxide can be introduced into the local grid (distribution line). As a result, the utilization rate of the power grid and the load factor of the energy consumer CE can be improved.

The energy management device 100, the energy management device 100a, and the energy management device 100b described above include a computer system. The energy management device 100, the energy management device 100a, and the energy management device 100b record a program for realizing the above processing on a computer-readable recording medium, and read the program recorded on the recording medium into the computer system. The above-mentioned various processes may be performed by executing the process. The "computer system" referred to here may include hardware such as an OS and peripheral devices. The "computer-readable recording medium" includes a flexible disk, a magneto-optical disk, a ROM, a writable non-volatile memory such as a flash memory, a portable medium such as a CD-ROM, a hard disk built in a computer system, and the like. It refers to the storage device of.

Furthermore, the "computer-readable recording medium" is a volatile memory inside a computer system that serves as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line (for example, DRAM (Dynamic)). It also includes those that hold the program for a certain period of time, such as Random Access Memory)). Further, the program may be transmitted from a computer system in which this program is stored in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the above program may be for realizing a part of the above-mentioned functions. Further, a so-called difference file (difference program) may be used, which can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiments for carrying out the present invention have been described above using the embodiments, the present invention is not limited to these embodiments, and various modifications and substitutions are made without departing from the gist of the present invention. Can be added. For example, the modifications shown in the embodiment can be applied to other embodiments. Further, the first modification of the embodiment and the second modification of the embodiment may be combined.

1, 1a, 1b ... Energy management system, 50, 50-1, 50-2, 50-3 ... Power sensor, 60-1, 60-2, 60-3 ... Smart meter, 100, 100a, 100b ... Energy management Device, 110 ... Communication unit, 120, 120b ... Monitoring unit, 130, 130a ... Calculation unit, 135 ... Judgment unit, 140, 140a ... Creation unit, 150 ... Storage unit, 152, 152b ... Corresponding information, 154, 154a ... Water Electrolyzer information, 156 ... Photovoltaic system information, 200, 200-1, 200-2, 200-3 ... Photovoltaic system, 300, 300-1, 300-2, 300-3 ... Water electrolyzer

Claims (8)

An energy management system that includes a photovoltaic power generation system connected to distribution lines and a water electrolyzer.
A monitoring unit that monitors the distribution power, which is the power supplied between the connection point of the photovoltaic power generation system and the connection point of the water electrolyzer in the distribution line.
A calculation unit that calculates the power consumption of the water electrolyzer based on the threshold value of the power supplied to the distribution line and the distribution power.
Based on the power consumption calculated by the calculation unit, a power consumption command value is derived, and a creation unit for creating control information for controlling the water electrolyzer including the derived power consumption command value is provided. Energy management system. The energy management system according to claim 1, wherein the calculation unit calculates the power consumption of the water electrolyzer by subtracting the threshold value of the electric power from the distributed electric power. The monitoring unit pairs the identification information of the photovoltaic power generation system and the identification information of the water electrolysis device, which is acquired from the storage unit that stores the identification information of the photovoltaic power generation system and the identification information of the water electrolysis device in association with each other. Based on the above, the distribution power supplied between the connection point of the photovoltaic power generation system corresponding to the identification information of the photovoltaic power generation system and the connection point of the water electrolysis device corresponding to the identification information of the water electrolysis device. Monitor and
The creating unit creates control information to the water electrolyzer corresponding to the identification information of the water electrolyzer included in the pairing, including the derived power consumption command value, according to claim 1 or claim. The energy management system according to 2. Further equipped with an estimation unit for estimating the distribution power,
The energy management system according to any one of claims 1 to 3, wherein the monitoring unit monitors the distributed power estimated by the estimation unit. A determination unit for determining whether or not the power consumption calculated by the calculation unit exceeds the power consumption that can be consumed by the water electrolyzer is further provided.
Based on the result determined by the determination unit, the creation unit derives a limit command value for limiting the output of the photovoltaic power generation system, and is supplied by the photovoltaic power generation system including the derived limit command value. The energy management system according to any one of claims 1 to 4, which creates control information for limiting the power generation. A monitoring unit that monitors the distribution power, which is the power supplied between the connection point of the photovoltaic power generation system and the connection point of the water electrolyzer on the distribution line to which the photovoltaic power generation system and the water electrolyzer are connected. When,
A calculation unit that calculates the power consumption of the water electrolyzer based on the threshold value of the power supplied to the distribution line and the distribution power.
Based on the power consumption calculated by the calculation unit, a power consumption command value is derived, and a creation unit for creating control information for controlling the water electrolyzer including the derived power consumption command value is provided. Energy management device. It is an energy management method executed by an energy management system including a photovoltaic power generation system connected to a distribution line and a water electrolysis device.
A step of monitoring the distribution power, which is the power supplied between the connection point of the photovoltaic power generation system and the connection point of the water electrolyzer in the distribution line, and
A step of calculating the power consumption of the water electrolyzer based on the threshold value of the power supplied to the distribution line and the distribution power, and
A step of deriving a power consumption command value based on the power consumption calculated in the calculation step, and a step of deriving the power consumption command value.
An energy management method executed by an energy management system, which comprises a step of creating control information for controlling the water electrolyzer including the derived power consumption command value. For the computer of the energy management system including the photovoltaic power generation system connected to the distribution line and the water electrolyzer.
A step of monitoring the distribution power, which is the power supplied between the connection point of the photovoltaic power generation system and the connection point of the water electrolyzer in the distribution line, and
A step of calculating the power consumption of the water electrolyzer based on the threshold value of the power supplied to the distribution line and the distribution power, and
A step of deriving a power consumption command value based on the power consumption calculated in the calculation step, and a step of deriving the power consumption command value.
A control program that executes a step of creating control information for controlling the water electrolyzer including the derived power consumption command value.

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