JP6924989B2 - Power management system and power management method - Google Patents

Description

The present invention relates to a power management system and a power management method.

The introduction of the feed-in tariff (FIT) for renewable energy in July 2012 has significantly changed the non-residential photovoltaic power generation market (public / industrial sector). According to JPEA PV OUTLOOK 2030, the ratio of non-residential use to the total domestic shipment was 50% in 2012 (relative to 3.8 GW of domestic shipment) and 73% in 2013 (relative to 8.4 GW). In the first half of 2014 (compared to the total domestic shipment of 4.3 GW in the first half), it increased significantly to 77%.

With the large amount of certified equipment for photovoltaic power generation, if all of them are in operation, there is a concern that the amount of power supplied by photovoltaic power generation will exceed the amount of power demand during the light load period when power demand is low. In, it was decided to make a grid connection on the condition of "unlimited and uncompensated output suppression". In the future, with the further increase in the amount of photovoltaic power generation grid connections, the implementation of output curtailment for the purpose of adjusting the supply and demand of electric power is becoming a reality.
Against this social background, both the amount and frequency of surplus electricity generated due to output curtailment are expected to increase, and hydrogen is once produced using the surplus electricity of renewable energy, for example, it is necessary when electricity demand increases. Attention is being paid to a technology for converting hydrogen (hereinafter referred to as CO _2- free hydrogen) stored in accordance with the above into electric power and utilizing it in a district.

On the other hand, in Japan, in addition to public buildings, buildings such as houses, office buildings, and hospitals that significantly reduce annual energy consumption (Net Zero Energy Building, hereinafter referred to as ZEB) We are proceeding with the efforts we are aiming for. The 2014 Energy Basic Plan stipulates that by 2020, new public buildings, etc. will be aimed at achieving ZEB on average for new buildings by 2030.
To realize ZEB, make the best use of building planning methods, control solar radiation with eaves, louvers, etc., and reduce energy demand as much as possible in addition to improving the efficiency of building equipment to save energy. After that, the remaining energy demand will be covered by energy creation by renewable energy on-site (on the premises or in the district). However, in high-rise large-scale buildings in urban areas, the rooftop area where solar power generation can be installed is limited, and there is a limit to on-site energy creation.

In anticipation of the above situation, for example, a wide area with a radius of several tens of kilometers is set as a local production for local consumption area, and at renewable energy power plants such as mega solar located off-site, surplus electricity is efficiently utilized and CO ₂ free. Produces hydrogen and uses it as high-pressure hydrogen gas. After collecting this high-pressure hydrogen gas with a high-pressure hydrogen transport vehicle, it is transported and used in the core block in the area to cover the amount of energy creation required for building ZEB in the block, and the ZEB A system study aiming at realization has been started (for example, Patent Document 1).

As a hydrogen utilization system attached to a building, the transported hydrogen is safely stored in, for example, a tank using a flame-retardant hydrogen storage alloy, converted into electric power and heat by fuel cell cogeneration, and stored in a storage battery, a heat storage system, and the like. By implementing efficient energy management in combination with other building equipment, it can be expected to become an important means for realizing ZEB and improve the Business Continuity Plan (BCP).
For example, _{as an example of a system that produces CO 2-} free hydrogen and aims to realize ZEB, multiple renewable energy power plants such as mega solar are installed, and the power obtained from these is supplied to the existing power system. A system that supplies power from the power system to multiple districts can be considered. In this case, if power is generated at each renewable energy power plant in excess of the power used in each block, surplus power will be generated and this surplus power cannot be utilized.

On the other hand, when surplus electricity is generated at each renewable energy power plant, if hydrogen is produced from this surplus electricity, this hydrogen is transported to each block and converted into electricity or heat for use in those blocks. can do.

Further, Patent Document 2 describes a technique for optimizing integrated energy in a plurality of facilities that share thermal energy between a plurality of thermal plants.

Japanese Unexamined Patent Publication No. 2014-122399 Japanese Unexamined Patent Publication No. 2005-182371

As mentioned above, in order to optimally maintain the amount of energy generated equivalent to ZEB of buildings in the block based on the use of _{CO 2-} free hydrogen, various measures to control the supply-demand balance of _{CO 2-free hydrogen are used.} Predictive control is essential. That is, on the power supply side, it is necessary to predict the amount of surplus power at the renewable energy power plant every moment and the amount of CO _{2-free hydrogen produced.} On the power demand side, it is necessary to forecast the power demand in buildings from moment to moment. Furthermore, it is assumed that the route selection in which _{the hydrogen transport vehicle cyclically collects CO 2-} free hydrogen from a plurality of renewable energy power plants may be a control parameter.
In addition, CO _2- free hydrogen is transported to the block as a high-pressure gas. Currently, a transport container called "curdle", which is a bundle of cylinders, is filled with high-pressure hydrogen gas for transportation, or when transporting a larger amount, a large cylinder that can withstand a high pressure of about 20 MPa is bundled. It is common to pressurize and fill the trailer with hydrogen gas before transporting it.

Hydrogen transported by a hydrogen transport vehicle or the like is transferred from a high-pressure cylinder of the hydrogen transport vehicle to, for example, a hydrogen storage alloy tank installed in a building or a site. Here, when the gas in the high-pressure cylinder is decompressed, if the capacity of the processing equipment is 300 m ³ or more per day, it corresponds to the first-class high-pressure gas production and is subject to regulation. It is expected that the installation of equipment subject to regulations such as the High Pressure Gas Safety Act in buildings and premises will cause various inconveniences as described below.
Obtaining a manufacturing license, completion inspection, security inspection, periodic inspection, etc. are required, and it takes a lot of time in terms of procedure. Regulations such as safety distance and fire distance, and equipment (barriers and safety devices) necessary for ensuring safety will increase construction costs. It is necessary to appoint a security officer, which increases maintenance costs. When a trailer or the like is driven by a fossil fuel engine, CO ₂ emissions related to transportation fuel are generated, which impairs the high environmental value of _{CO 2-free hydrogen.}

In view of the above problems, it is an object of the present invention to provide a power management system and a power management method capable of _{performing various predictive controls for controlling the supply-demand balance of hydrogen and optimizing and utilizing CO 2-free hydrogen due to surplus power.} And.

In view of the above problems, the power management system according to one aspect of the present invention is based on a surplus power prediction unit that predicts surplus power generated by using renewable energy and the predicted surplus power. It has a hydrogen storage plan generation unit that generates a plan for storing hydrogen produced by using the surplus electric power, and a function of filling the stored hydrogen and generating electricity with the filled hydrogen. A hydrogen transport vehicle to be transferred to a facility to be delivered, a vehicle allocation plan generation unit that generates a vehicle allocation plan to allocate the hydrogen transport vehicle to the facility, and the hydrogen vehicle when the hydrogen vehicle is connected to a power conversion device of the facility. A power generation plan using hydrogen for the hydrogen transport vehicle is generated based on the hydrogen load capacity of the facility, the purchased power at the facility, and the required power, and the hydrogen utilization plan is notified to the vehicle allocation plan generation unit and the hydrogen transport vehicle. It has a generator and a generator.
Further, the power management system according to another aspect of the present invention uses a surplus power prediction unit that predicts surplus power without consuming the power generated by using renewable energy, and the surplus power. A hydrogen storage plan generator that generates a plan to store the produced hydrogen based on the predicted surplus electric power, and a hydrogen transport vehicle having a function of generating electricity from the stored hydrogen are delivered to the stored hydrogen. When the vehicle allocation plan generation unit that generates the vehicle allocation plan to be allocated to the facility and the power conversion device of the facility to which the stored hydrogen is delivered are connected, the hydrogen loading of the hydrogen transport vehicle is carried out. Based on the amount, the purchased power at the facility, and the required power, a power generation plan using hydrogen of the hydrogen transport vehicle is generated, and the vehicle allocation plan generation unit and the hydrogen utilization plan generation unit that notifies the hydrogen transport vehicle. Has.

In the power management method according to one aspect of the present invention, the surplus power prediction unit predicts the surplus power generated by the power generated using the renewable energy, and the hydrogen storage plan generation unit predicts the predicted surplus power. Based on the above, a plan for storing hydrogen produced by using the surplus electric power is generated, and the hydrogen transport vehicle has a function of filling the stored hydrogen and generating electricity by the filled hydrogen. The vehicle allocation plan generation unit generates a vehicle allocation plan for allocating the hydrogen transport vehicle to the facility, and the hydrogen utilization plan generation unit connects the hydrogen transport vehicle to the power conversion device of the facility. Then, a power generation plan using the hydrogen of the hydrogen transport vehicle is generated based on the hydrogen load capacity of the hydrogen transport vehicle, the purchased power at the facility, and the required power, and the vehicle allocation plan generation unit and the hydrogen transport are generated. Notify the vehicle.
Further, in the power management method according to another aspect of the present invention, the surplus power prediction unit predicts the surplus power without consuming the power generated by using the renewable energy, and the surplus power is used. A hydrogen storage plan generator generates a plan for storing the produced hydrogen based on the predicted surplus electric power, and a hydrogen transport vehicle having a function of generating electricity from the stored hydrogen is delivered to the stored hydrogen. When the vehicle allocation plan generation unit generates a vehicle allocation plan to allocate the vehicle to the facility, and the hydrogen transport vehicle is connected to the power conversion device of the facility, the hydrogen load capacity of the hydrogen transport vehicle and the purchased power and the required power in the facility are generated. Based on the above, the hydrogen utilization plan generation unit generates a power generation plan using hydrogen of the hydrogen transport vehicle, and notifies the vehicle allocation plan generation unit and the hydrogen transport vehicle.

According to the present invention, various predictive control to control the supply balance of production of CO ₂ free hydrogen by the surplus power it can be utilized to optimize the CO ₂ free hydrogen by excess power.

It is a schematic block diagram of the power management system which concerns on embodiment of this invention. It is a block diagram which shows the structure of DEMS. It is a flowchart which shows the operation of the power management system which concerns on embodiment of this invention. It is a flowchart which shows the operation of the power management system which concerns on embodiment of this invention. It is a flowchart which shows the operation of the power management system which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a power management system 1 according to an embodiment of the present invention.
In FIG. 1, the renewable energy power plant 10 is provided with a renewable energy power generation facility 11 such as a mega solar. Further, the renewable energy power plant 10 includes a hydrogen production facility 12 and a hydrogen storage facility 13. Further, the renewable energy power plant 10 is provided with a plant management unit 15. _{The hydrogen production facility 12 produces CO 2-} free hydrogen using the surplus electric power generated at the renewable energy power plant 10. The hydrogen storage facility 13 stores CO _2- free hydrogen produced by the hydrogen production facility 12. Further, this CO _2- free hydrogen can be mounted on the hydrogen transport vehicle 31 and transported. The plant management unit 15 manages various types of information of the renewable energy power plant 10. The plant management unit 15 is connected to the network 70.
Although only one renewable energy power plant 10 is shown here, there are a plurality of renewable energy power plants 10. Further, in the above example, the renewable energy power generation facility 11 is solar power generation such as mega solar, but the present invention is not limited to this, and other renewable energy power generation, for example, wind power generation may be used.

A building 21 is constructed in the block 20. Power is supplied to the building 21 from the commercial power source 23, which serves as a power consumption destination. The commercial power source 23 is an existing power system that mainly supplies power from the renewable energy power plant 10. Further, the building 21 is provided with a building energy control system (hereinafter referred to as BEMS) 22 (third management unit) that controls the fuel cell mounted on the hydrogen transport vehicle 31 as a subordinate generator. The BEMS 22 predicts the electric power demand of the building 21 and manages to supply hydrogen from the hydrogen transport vehicle 31 to the building 21 as needed.

Although only one block 20 is shown here, there are a plurality of blocks 20. Further, here, only one building 21 is shown in one block 20, but there are a plurality of buildings 21 in one block 20. In addition, this district 20 has at least one facility, and the facility is provided with a load that consumes electric power, and the electric power generated by the purchased electric power and hydrogen so as to satisfy the demand power of this load. (Electricity generated by a hydrogen transport vehicle) is supplied. However, as for the electric power generated by hydrogen, only the purchased electric power may be supplied depending on the required electric power and the remaining amount of hydrogen charged in the hydrogen transport vehicle (hydrogen loading capacity). Further, the facility may be a building, a commercial facility, a public facility, a general household, or the like.

A plurality of hydrogen transport vehicles 31 are resident in the hydrogen transport center 30. As shown in FIG. 2, the hydrogen transport vehicle 31 includes a high-pressure hydrogen tank 33 and a fuel cell 32. The hydrogen transport vehicle 31 can convert the hydrogen filled in the high-pressure hydrogen tank 33 into electric power by the fuel cell 32 and supply it to the outside. Further, the hydrogen transportation center 30 is provided with a vehicle allocation management unit 35 (vehicle allocation plan generation unit). The vehicle allocation management unit 35 has a function of managing the allocation of the hydrogen transport vehicle 31 belonging to the hydrogen transport center 30, and generates a vehicle allocation plan for allocating the hydrogen transport vehicle 31 to the facility. The vehicle allocation management unit 35 generates a vehicle allocation plan based on the power generation plan notified from the BEMS control unit 25 and the hydrogen storage plan. The vehicle allocation management unit 35 is connected to the network 70.

The information providing center 40 provides various information necessary for controlling the power management system 1, such as weather forecast data, actual data, and photovoltaic power generation output suppression information. The information providing center 40 is provided with an information providing server 45. The information providing server 45 is connected to the network 70.
In this example, the information providing server 45 provides weather forecast data, actual data, photovoltaic power generation output suppression information, etc., but a server that provides weather forecast data, a server that provides actual data, and sunlight. Servers that provide power generation output suppression information may be provided separately. Also, for example, the server that provides the weather forecast data is the server of the weather information agency, the server that provides the photovoltaic power generation output suppression information is the server of the electric power company, and so on. It may be.

The power supply management center 50 is provided with a power management unit 55 (surplus power prediction unit, hydrogen storage plan generation unit). The power management unit 55 is connected to the network 70. The electric power management unit 55 manages the surplus electric power of the plurality of renewable energy power plants 10 as well as the production amount and the storage amount of _{CO 2-free hydrogen.} The power management unit 55 has a function of predicting surplus power generated by using renewable energy and a plan to store hydrogen produced by using surplus power based on the predicted surplus power. It has a function to generate.
In this example, the renewable energy power plant 10, the hydrogen transport center 30, the information provision center 40, and the power supply management center 50 are installed at different locations, but the renewable energy power plant 10, the hydrogen transport center, and the hydrogen transport center are installed at different locations. 30, the information provision center 40, the power supply management center 50, or all or a part thereof may be installed in the same place.

Further, the plant management unit 15, the BEMS 22, the vehicle allocation management unit 35, and the power management unit 55 are all connected to each other so as to be able to communicate with each other via the network 70, and can share information with each other.

FIG. 2 is a block diagram showing the configuration of BEMS 22 of the building 21. In FIG. 2, the BEMS control unit 25 controls the entire system of the BEMS 22. Further, the BEMS control unit 25 can be connected to the network 70.

The electric power from the commercial power source 23 is supplied to the load 26 in the building 21. The load 26 is various electric appliances, lighting, air conditioning, and the like. Further, a power meter 27 is provided at each of the intake portion of the commercial power supply 23 and the connection portion with the hydrogen transport vehicle 31. The measured value of the power meter 27 is sent to the BEMS control unit 25.
A cable 36 from the hydrogen transport vehicle 31 is connected to the building 21 via a power conversion device 28 with a synchronization function. The hydrogen transport vehicle 31 includes a high-pressure hydrogen tank 33 and a fuel cell 32. The hydrogen transport vehicle 31 can convert the hydrogen filled in the high-voltage hydrogen tank 33 into electricity by the fuel cell 32 and output it as electric power for the building 21 via the cable 36. Further, the BEMS control unit 25 in the building 21 and the hydrogen transport vehicle 31 can perform building-vehicle communication via the cable 36.

The BEMS control unit 25 (hydrogen utilization plan generation unit) monitors the usage status of the load in the building 21 and the power supply from the commercial power source 23, and outputs a power generation command to the hydrogen transport vehicle 31 as needed. .. When the hydrogen transport vehicle is connected to the power conversion device 28 with a synchronization function of the building 21, the BEMS control unit 25 transports hydrogen based on the hydrogen load capacity of the hydrogen transport vehicle, the purchased power in the building 21, and the required power. A power generation plan using hydrogen of the vehicle 31 is generated, and the vehicle allocation management unit 35 and the hydrogen transport vehicle 31 are notified. Further, the BEMS control unit 25 regenerates the power generation plan using hydrogen according to the change in the demand power of the building 21, and notifies the vehicle allocation management unit 35 and the hydrogen transport vehicle 31 of the regenerated power generation plan. Here, the BEMS control unit 25 calculates the predicted power demand by predicting the power demand of the building 21 according to the history of the power demand in the past, the weather of the day, the day of the day, and the like. Based on the predicted power demand, a plan to receive power purchase power is generated, and when the hydrogen transport vehicle 31 is connected, the hydrogen load capacity of the hydrogen transport vehicle 31 is used as the basis for the predicted power demand. , Generate a plan to receive the supply of purchased power and a power generation plan by the hydrogen transport vehicle 31. Further, the BEMS control unit 25 acquires the remaining amount of hydrogen in the hydrogen transport vehicle 31 from the hydrogen transport vehicle 31 by communicating with the hydrogen transport vehicle 31, and the hydrogen load is a predetermined value. If it becomes less than, the connection with the hydrogen transport vehicle is released (power supply is stopped). This predetermined value may be predetermined. For example, a predetermined value may be determined so as to be the amount of hydrogen required for moving from the block 20 to the hydrogen storage facility 13. In this case, the predetermined value is dynamically determined according to the distance between the block 20 which is the delivery destination and the hydrogen transport vehicle 31 and the like.
When the hydrogen transport vehicle 31 receives the power generation command, the fuel cell 32 converts the hydrogen stored in the high-pressure hydrogen tank 33 into electricity and supplies it to the building 21. The hydrogen transport vehicle 31 may travel using hydrogen filled therein as fuel.

Next, an outline of the power management system 1 to which the present invention is applied will be described. In FIG. 1, the electric power management unit 55 of the electric power supply management center 50 receives weather forecast data, actual data, photovoltaic power generation output suppression information, etc. from the information providing server 45, and the solar power is adjusted by the electric power company. Based on information such as the time zone and power value to suppress the output of power generation, weather forecast, etc., the surplus power generation of photovoltaic power generation that the renewable energy power plant 10 cannot deliver to the existing power system is predicted every moment. do. When surplus power generation is predicted, an operation plan for the hydrogen production facility 12 is drawn up and each device is prepared. Then, the hydrogen production facility 12 _{starts CO 2-} free hydrogen production with the generation of surplus electric power. The produced hydrogen is stored in the hydrogen storage facility 13.

When the amount of hydrogen stored in the hydrogen storage facility 13 reaches the planned value, the power management unit 55 of the power supply management center 50 notifies the vehicle allocation management unit 35 of the hydrogen transportation center 30 of the allocation of the hydrogen transportation vehicle 31. , Share information and embark on a vehicle allocation plan. The assigned hydrogen transport vehicle 31 self-propells from the hydrogen transport center 30 to the renewable energy power plant 10.

At the renewable energy power plant 10, the hydrogen transport vehicle 31 is filled with hydrogen. In addition, based on the vehicle allocation plan, the hydrogen transport vehicle 31 may patrol a plurality of renewable energy power plants 10 and be filled with hydrogen. When the hydrogen transport vehicle 31 is filled with hydrogen, the hydrogen transport vehicle 31 self-propells toward the building 21 in the block 20.

When the hydrogen transport vehicle 31 arrives at the building 21 in the block 20, the DC output plug is fitted with a cable 36 extending from the power conversion device 28 with a synchronization function installed in the building. Then, the BEMS control unit 25 communicates with the power conversion device 28 with a synchronization function to determine the presence or absence of a vehicle and acquire the hydrogen load capacity, and based on the momentary change in power demand of the building, the fuel cell is driven. The necessity of power supply from the hydrogen transport vehicle 31 is determined, and a power generation instruction is issued to the hydrogen transport vehicle 31.

The BEMS control unit 25 notifies the electric power management unit 55 and the vehicle allocation management unit 35 of the hydrogen utilization schedule in the building 21 via the network 70, and shares the vehicle allocation plan of the transportation vehicle. The BEMS control unit 25 commands the power generation output value of the fuel cell 32 mounted on the hydrogen transport vehicle 31 every moment according to the fluctuation of the electric power demand of the building. Depending on the amount of hydrogen loaded in the hydrogen transport vehicle 31, the hydrogen transport vehicle 31 continues to supply electric power to the building 21 side for, for example, one day, one week, or one month. When the planned power generation amount is completed, the hydrogen transport vehicle 31 self-propells to the hydrogen transport center 30 or the renewable energy power plant 10.

As described above, in the present embodiment, various predictive controls for controlling the supply-demand balance of hydrogen can be performed, and CO _2- free hydrogen generated by surplus electric power can be optimized and utilized. Further, hydrogen is transferred by the hydrogen transport vehicle 31, converted into electricity by the fuel cell 32 of the hydrogen transport vehicle 31, and supplied to the building. This facilitates maintenance and reduces costs. Further, hydrogen may be used as driving energy for moving the hydrogen transport vehicle 31 by using the electric power from the fuel cell 32. This eliminates the need to drive the engine with fossil fuels and can reduce _{CO 2 emissions.}

3 to 5 are flowcharts showing the operation of the power management system 1 according to the embodiment of the present invention. The processing in the power management system is roughly divided into a first stage including a hydrogen production and storage process, a second stage including a hydrogen transportation process, and a third stage including a utilization process in a building. First, the hydrogen production and storage process (first stage) will be described.

FIG. 3 is a flowchart showing a hydrogen production and storage process (first stage).
(Step S101) The power management unit 55 of the power supply management center 50 suppresses the output of photovoltaic power generation due to weather forecast data, actual data, and power supply / demand adjustment from the information provision server 45 of the information provision center 40. The information is acquired and the process proceeds to step S102.
(Step S102) The power management unit 55 predicts the photovoltaic power generation output at the renewable energy power plant 10, which changes from moment to moment, from the weather forecast data, the actual data, and the photovoltaic power generation output suppression information, and proceeds to step S103. Proceed with processing.
(Step S103) The electric power management unit 55 predicts the generation of surplus electric power from the photovoltaic power generation output obtained in step S101 and the electric power demand forecast, and proceeds to the process in step S104. In this forecast, for example, on the day before the forecast target, the power demand forecast and the surplus power are obtained at predetermined time intervals (for example, every 30 minutes) on the forecast target day (1 day). The surplus power can be calculated as surplus power, for example, the portion of the generated power that exceeds the power demand forecast (for example, the planned value of reverse power flow to commercial power or supplied to the facility 21).
(Step S104) The power management unit 55 determines whether or not surplus power is generated. If the photovoltaic power generation output is larger than the power demand forecast, it can be determined that surplus power is generated. When the power management unit 55 determines that surplus power is generated (step S104: Yes), the process proceeds to step S105, and when it is determined that surplus power is not generated (step S104: No), the process is performed. Proceed to step S111.

(Step S105) The power management unit 55 determines whether or not hydrogen is being transferred based on the information from the plant management unit 15. When the power management unit 55 determines that hydrogen transfer is in progress (step S105: Yes), the process proceeds to step S106, and when it is determined that hydrogen transfer is not in progress (step S105: No), The process proceeds to step S107.

(Step S106) The electric power management unit 55 stops the transfer of hydrogen to the hydrogen transport vehicle 31, and proceeds to the process in step S107.

(Step S107) The power management unit 55 formulates a plan for optimizing hydrogen production and hydrogen storage, and proceeds to the process in step S108.
(Step S108) The power management unit 55 sets a hydrogen production schedule based on the plan formulated in step S107, and proceeds to the process in step S109.
(Step S109) The electric power management unit 55 sends an instruction to the hydrogen storage facility 13 via the network 70 and the plant management unit 15, and the hydrogen storage facility 13 stores the produced hydrogen according to the instruction from the electric power management unit 55. Prepare.

(Step S110) The hydrogen production facility 12 starts hydrogen production from surplus electric power according to an instruction from the electric power management unit 55. The produced hydrogen is stored in the hydrogen storage facility 13.
When surplus electric power is generated by the processing of steps S101 to S110, hydrogen is produced in the hydrogen production facility 12, and the produced hydrogen is stored in the hydrogen storage facility 13. Here, in a situation where surplus electric power is generated, the transfer to the hydrogen transport vehicle 31 is stopped, and the production and storage of hydrogen are preferentially executed.

(Step S111) The electric power management unit 55 determines whether or not hydrogen production is in progress based on the information from the plant management unit 15. When it is determined that hydrogen is being produced (step S111: Yes), the power management unit 55 proceeds to step S112, and when it is determined that hydrogen is not being produced (step S111: No), The process proceeds to step S113.
(Step S112) The power management unit 55 stops hydrogen production and proceeds to the process in step S113.
(Step S113) The electric power management unit 55 determines whether or not the hydrogen storage amount has reached the planned set value. If the storage amount has not reached the set value (step S113: No), the power management unit 55 proceeds to step S114, and if the storage amount has reached the set value (step S113: Yes), the process is stepped. Proceed to S115.

(Step S114) The power management unit 55 stops the hydrogen transfer and returns the process to step S101.
(Step S115) The electric power management unit 55 formulates a plan for optimizing hydrogen transfer, and shares information with the vehicle allocation management unit 35 of the hydrogen transportation center 30 and the BEMS control unit 25 of the block 20.
(Step S116) The power management unit 55 sets a hydrogen transfer schedule and proceeds to the process in step S117.
(Step S117) The electric power management unit 55 prepares for hydrogen transfer and proceeds to the hydrogen transport process (second stage).
Here, when there is no surplus power generated (for example, when it is cloudy or rainy during the day, or when it is nighttime), hydrogen production is stopped to generate hydrogen. It can be preferentially supplied to the power system rather than manufactured. In addition, since the power demand tends to be low at night, the hydrogen transport vehicle 31 is prepared for hydrogen transfer during the time when the power demand is low, and by transferring hydrogen, the hydrogen transport vehicle 31 is used during the time when the power demand is high. It is possible to formulate a schedule for arriving at the block 20 (building 21).

FIG. 4 is a flowchart showing a hydrogen transport process (second stage).
(Step S201) The vehicle allocation management unit 35 plans the allocation of the hydrogen transport vehicle 31, and proceeds to the process in step S202.
(Step S202) The vehicle allocation management unit 35 determines whether or not the hydrogen loading capacity of the hydrogen transport vehicle 31 is less than the set value. If the hydrogen loading capacity of the hydrogen transport vehicle 31 is less than the set value (step S202: Yes), the vehicle allocation management unit 35 proceeds to the process in step S203. If the hydrogen loading capacity of the hydrogen transport vehicle 31 is not less than the set value (step S202: No), the vehicle allocation management unit 35 proceeds to the process in step S204.
(Step S203) The vehicle allocation management unit 35 dispatches the hydrogen transport vehicle 31 to the block 20, processes the block 20, and enters the utilization process (third stage) in the building.
(Step S204) The vehicle allocation management unit 35 allocates the hydrogen transport vehicle 31 to the renewable energy power plant 10 and proceeds to the process in step S205.
(Step S205) When the hydrogen transport vehicle 31 is dispatched to the renewable energy power plant 10, it is filled with hydrogen and returns to the process of hydrogen production and storage processing in the first stage.

FIG. 5 is a flowchart showing a utilization process (third stage) in a building.
(Step S301) The BEMS control unit 25 predicts the electric power and heat demand (heating, cooling, hot water production, etc.) in the building 21 and proceeds to the process in step S302.
(Step S302) The BEMS control unit 25 determines whether or not the hydrogen transport vehicle 31 is connected, and if the hydrogen transport vehicle 31 is not connected (step S302: No), the process is returned to step S301 and hydrogen is returned. If the transport vehicle 31 is connected (step S302: Yes), the process proceeds to step S303.
(Step S303) The BEMS control unit 25 determines whether or not the hydrogen loading capacity of the hydrogen transport vehicle 31 is sufficient. If the hydrogen loading capacity of the hydrogen transport vehicle 31 is not sufficient (step S303: No), the BEMS control unit 25 proceeds to step S304, and if the hydrogen loading capacity of the hydrogen transport vehicle 31 is sufficient (step S303: Yes). , The process proceeds to step S305.

(Step S304) The BEMS control unit 25 stops the fuel cell 32 and returns the process to step S301.
(Step S305) The BEMS control unit 25 formulates a plan for optimizing hydrogen release and utilization, and proceeds to the process in step S306.
(Step S306) The BEMS control unit 25 sets a hydrogen utilization schedule and proceeds to the process in step S307.
(Step S307) The BEMS control unit 25 activates the fuel cell 32 of the hydrogen transport vehicle 31 and returns the process to step S301.

By the processing of steps S301 to S307, the fuel cell 32 of the hydrogen transport vehicle 31 is activated according to the power supply / demand state of the building 21, and the power supply from the hydrogen transport vehicle 31 is supplied to the building 21.

In the above description, the hydrogen transport vehicle 31 is a vehicle that transports high-pressure hydrogen, but the hydrogen transport method may be a vehicle equipped with a hydrogen storage alloy tank or a lorry for transporting liquid hydrogen.
_{In the present embodiment, CO 2-} free hydrogen is efficiently produced by using surplus electric power at a renewable energy power plant 10 such as a mega solar located off-site, and based on the electric power demand forecast of a plurality of buildings 21. _{CO 2-} free hydrogen, which covers the equivalent amount of energy generated for ZEB conversion, is most efficiently transported to the building. Furthermore, it eliminates the need for hydrogen utilization systems such as fuel cells and hydrogen storage devices that should be attached to the building, and has the effect of reducing building costs. As a result, the surplus electric power is predicted, and based on the predicted surplus electric power, a plan for allocating the hydrogen transport vehicle 31 to each block 20 and providing the electric power is made, so that the surplus electric power is required in the area. It is possible to effectively utilize the surplus electric power in the above.
Further, since the hydrogen transport vehicle 31 uses hydrogen to generate electric power to supply electric power, it is not necessary to install equipment for reducing the pressure of high-pressure gas in the block 20, so that the equipment cost and the cost for various inspections are required. Can be suppressed.

By recording a program for realizing all or a part of the functions of the power management system 1 on a computer-readable recording medium, and having the computer system read and execute the program recorded on the recording medium. Each part may be processed. The term "computer system" as used herein includes hardware such as an OS and peripheral devices.
Further, the "computer system" includes a homepage providing environment (or a display environment) if a WWW system is used.
Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, or a storage device such as a hard disk built in a computer system. Further, a "computer-readable recording medium" is a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short period of time. In that case, it also includes the one that holds the program for a certain period of time, such as the volatile memory inside the computer system that is the server or client. Further, the above-mentioned program may be a program for realizing a part of the above-mentioned functions, and may be a program for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within a range not deviating from the gist of the present invention are also included.

10: Renewable energy power plant, 11: Power generation equipment, 12: Hydrogen production equipment, 13: Hydrogen storage equipment, 15: Plant management department, 20: District, 21: Building, 23: Commercial power supply, 25: BEMS control department, 30: Hydrogen transport center, 31: Hydrogen transport vehicle, 32: Fuel cell, 33: High-pressure hydrogen storage tank, 35: Vehicle allocation management department, 40: Information provision center, 45: Information provision server, 50: Power supply management center, 55 : Power Management Department, 70: Network

Claims (8)

The surplus power prediction unit that predicts the surplus power generated by using renewable energy
A hydrogen storage plan generation unit that generates a plan for storing hydrogen produced by using the surplus power based on the predicted surplus power.
A hydrogen transport vehicle that has the function of filling the stored hydrogen and generating electricity from the filled hydrogen and transfers it to a facility that serves as a delivery destination for hydrogen.
A vehicle allocation plan generation unit that generates a vehicle allocation plan for allocating the hydrogen transport vehicle to the facility,
When the hydrogen transport vehicle is connected to the power conversion device of the facility, a power generation plan using hydrogen of the hydrogen transport vehicle is performed based on the hydrogen load capacity of the hydrogen transport vehicle, the power purchased at the facility, and the required power. A hydrogen utilization plan generation unit that generates and notifies the vehicle allocation plan generation unit and the hydrogen transport vehicle,
Power management system with. The hydrogen utilization plan generation unit regenerates the power generation plan using the hydrogen according to the change in the power demand of the facility, and notifies the vehicle allocation plan generation unit and the hydrogen transport vehicle of the regenerated power generation plan. The power management system according to claim 1. The power management system according to claim 1 or 2, wherein the hydrogen utilization plan generation unit releases the connection with the hydrogen transport vehicle when the hydrogen load capacity of the hydrogen transport vehicle becomes less than a predetermined value. .. The vehicle allocation plan generation unit generates any one of claims 1 to 3 based on the power generation plan notified from the hydrogen utilization plan generation unit and the hydrogen storage plan. The power management system described in the section. The power management system according to any one of claims 1 to 4, wherein the hydrogen transport vehicle travels using hydrogen filled therein as fuel. The surplus power prediction unit predicts the surplus power generated by using renewable energy,
The hydrogen storage plan generator generates a plan for storing hydrogen produced by using the surplus power based on the predicted surplus power.
The hydrogen transport vehicle has a function of filling the stored hydrogen and generating electricity by the filled hydrogen, and transfers the hydrogen to a facility to which the hydrogen is delivered.
The vehicle allocation plan generation unit generates a vehicle allocation plan for allocating the hydrogen transport vehicle to the facility.
When the hydrogen transport vehicle is connected to the power conversion device of the facility, the hydrogen utilization plan generation unit of the hydrogen transport vehicle is based on the hydrogen load capacity of the hydrogen transport vehicle, the purchased power in the facility, and the required power . A power management method that generates a power generation plan using hydrogen and notifies the vehicle allocation plan generation unit and the hydrogen transport vehicle. A surplus power prediction unit that predicts surplus power without consuming the power generated using renewable energy,
A hydrogen storage plan generator that generates a plan for storing hydrogen produced using the surplus power based on the predicted surplus power, and a hydrogen storage plan generator.
A vehicle allocation plan generation unit that generates a vehicle allocation plan for allocating a hydrogen transport vehicle having a function of generating electricity from the stored hydrogen to a facility to which the stored hydrogen is delivered, and a vehicle allocation plan generation unit.
When the hydrogen transport vehicle is connected to a power conversion device of a facility to which the stored hydrogen is delivered, the hydrogen transport vehicle is based on the hydrogen load capacity of the hydrogen transport vehicle, the purchased power at the facility, and the required power. A hydrogen utilization plan generation unit that generates a power generation plan using hydrogen of a hydrogen transport vehicle and notifies the vehicle allocation plan generation unit and the hydrogen transportation vehicle.
Power management system with. The surplus power prediction unit predicts the surplus power without consuming the power generated using renewable energy.
The hydrogen storage plan generation unit generates a plan for storing hydrogen produced by using the surplus power based on the predicted surplus power.
The vehicle allocation plan generation unit generates a vehicle allocation plan for allocating a hydrogen transport vehicle having a function of generating electricity from the stored hydrogen to a facility to which the stored hydrogen is delivered.
When the hydrogen transport vehicle is connected to the power conversion device of the facility, the hydrogen utilization plan generation unit of the hydrogen transport vehicle is based on the hydrogen load capacity of the hydrogen transport vehicle, the purchased power and the demand power in the facility. Generate a power generation plan using hydrogen and notify the vehicle allocation plan generation unit and the hydrogen transport vehicle.
Power management method.

Images