JP7356946B2 - Power monitoring and control device, power monitoring and control program - Google Patents

Description

The present invention relates to a power monitoring and control device for distributed power supply equipment. For more information, please refer to our electric power monitoring and control device, which uses wireless communication to acquire power information such as current, electric power, and electric energy required to control the operation of a household fuel cell cogeneration system, which is an example of distributed power supply equipment. This relates to a supervisory control program.

(Existing equipment)

In addition to commercial power sources, homes equipped with so-called distributed power sources, such as solar power generation, storage batteries, cogeneration systems that generate electricity using gas engines and fuel cells, and utilize waste heat, may experience overcurrent or reverse power flow. It is important to monitor such matters. For example, a distributed power source such as a cogeneration system is installed by attaching a clamp-type current sensor (hereinafter referred to as a CT clamp) to the distribution board of the house, and wiring work that penetrates the wall of the house. It was common to monitor overcurrent, reverse power flow, etc. by connecting to the control system of a distributed power source.

By the way, if it is possible to directly acquire data on the power usage status of a house from a smart meter or indirectly from a home controller such as a HEMS (Home Energy Management System), CT Although it is possible to omit the work of attaching the clamp to a distribution board or the like and the work of wiring penetrating the wall of a house, this has not yet been realized.

Note that smart meter information acquisition has communication paths of A route, B route, and C route.

Route A is a communication route that connects the smart meter and the power company, route B is a communication route that connects the smart meter and HEMS, etc., and route C is the communication route that connects the smart meter and HEMS, etc., and route C is the communication route that connects the smart meter and the power company. This is a communication route for providing information to three parties (retail electricity companies, etc.).

As a reference regarding smart meters, Patent Document 1 provides a distribution board that can prevent enlargement even when it accommodates equipment that manages both power consumption data of branch power lines and power amount data from smart meters. Are listed.

More specifically, Patent Document 1 describes a main breaker, a plurality of branch breakers connected to the main bar, a current sensor unit that measures the current flowing through each branch breaker, and a current sensor unit installed at a site adjacent to the branch breaker. and a power information transmitting unit equipped with a power information output section that receives branch current information measured by the current sensor unit, calculates and outputs power usage for each branch circuit, and the power information transmitting unit is connected to the main bar. between the smart meter installed on the primary side of the main breaker via the connected main bar and G3-PLC (Power Line Communication) or Wi-SUN (Wireless Smart Utility Network). B-route communication is performed in one of the communications, and in addition to the power amount data obtained through the communication, the power consumption data of the branch electric line obtained from the current sensor unit is output to the outside.

In addition, as a conventional technology described in Patent Document 1, a power information transmission unit installed in a distribution board performs B route communication with a smart meter using either G3-PLC or Wi-SUN wireless communication. , there is no description of the relationship between the power information transmission unit and the distributed power sources.

Here, the control system of a distributed power source such as a cogeneration system can obtain power information directly from the smart meter via Route B, or from the smart meter to HEMS via Route B, and then from the HEMS to a specified small If it is assumed that power information will be acquired indirectly via power wireless communication or the like, problems with wireless communication may occur.

When the control system of a distributed power source such as a cogeneration system acquires power information from a smart meter or HEMS etc. via wireless communication (specific low power wireless communication, Wi-SUN wireless communication/B route), communication is ensured. It must be installed in a location where communication strength can be ensured to enable implementation.

Conventionally, power and current information was acquired using wires (for example, CT clamp wiring), so it is possible to use distributed power sources such as cogeneration systems without worrying about the strength of communication with smart meters or HEMS. The installation location of the control system had been determined.

Japanese Patent Application Publication No. 2014-075895

However, communication failures may occur sporadically due to changes in the surrounding environment.

In the case of regular communication failures, it may be possible to take drastic measures (such as changing the installation location of the cogeneration system), but in case of sporadic communication failures, it is possible to However, for example, measures must be taken with a focus on safety in order to prevent overcurrent from occurring.

Basically, if there is real-time information, it is possible to properly control the power generation of a cogeneration system, but even if there is no communication failure, the installation environment (for example, sudden , environments where fluctuations in power consumption are likely to occur), real-time power information alone may not be sufficient.

An object of the present invention is to obtain a power monitoring and control device and a power monitoring and control program that can improve the reliability of acquiring power information through wireless communication.

The power monitoring and control device according to the present invention is a power monitoring and control device that acquires power information from a smart meter connected to a power lead-in line for drawing commercial power indoors, and which communicates wirelessly with the smart meter. a communication unit that establishes communication; an acquisition unit that acquires power information associated with indoor power consumption through communication by the communication unit; and control of power generation output of the distributed power source based on the power information acquired by the acquisition unit. and a second control unit that controls the power generation output of the distributed power source based on power information predicted from alternative information that replaces the power information to be acquired by the acquisition unit. There is.

The communication section establishes wireless communication with the smart meter.

The acquisition unit acquires power information associated with indoor power consumption through communication by the communication unit.

The first control unit controls the power generation output of the distributed power source based on the power information acquired by the acquisition unit.

Further, the second control unit controls the power generation output of the distributed power source based on power information predicted from alternative information that replaces the power information that the acquisition unit should acquire.

Thereby, the reliability of acquiring power information through wireless communication can be improved.

In the present invention, the second control section replaces the first control section when a communication failure occurs in the communication section, or when it is determined that a communication failure does not occur but power change prediction is necessary. It is characterized by controlling the power generation output of distributed power sources.

The present invention is characterized in that the alternative information is time information, and the power generation output is controlled at a predetermined time or time period.

In the present invention, the alternative information is similar operating information obtained from a server that receives and stores operating information from distributed power sources installed in each of a plurality of houses via a network, and the similar operating information It is characterized by controlling the power generation output based on the following.

In the present invention, the alternative information is power generation information that stores past power load changes in time series, and the maximum value, minimum value, mode, average value of the power generation information for a predetermined period, or the power generation information The feature is that the power generation output is controlled using one of the predicted values based on learning.

In the present invention, if the alternative information is information on the presence or absence of a resident, and it is estimated that the resident is at home or not at home, the power generation output is set in advance or the power generation within a certain period of time from the present. It is characterized by controlling the power generation output using either the maximum value, minimum value, mode value, average value of the output, or a predicted value based on learning that combines the presence/absence information of the resident and the power generation output within a certain period of time. .

In the present invention, the distributed power source is a fuel cell cogeneration system including a power generation section that generates power using gas and a hot water generation section that generates hot water using heat generated during power generation. It is characterized by

The power monitoring control program according to the present invention is characterized in that it causes a computer to operate as the power monitoring and control device according to any one of claims 1 to 7.

The present invention is new in that power information is acquired through wireless communication between a smart meter or HEMS and a distributed power source compared to the conventional technology, and it is a major advance in predicting changes in power information after the current state. There is.

INDUSTRIAL APPLICATION This invention produces the effect that the reliability of acquisition of power information by wireless communication can be improved.

1 is a schematic diagram of a cogeneration device according to an embodiment of the present invention and a house in which the cogeneration device is installed. It is a control block diagram of the controller of a cogeneration device. It is a transition characteristic diagram of the amount of electricity used, the amount of hot water stored in a tank, the amount of hot water used, and the amount of gas used based on living conditions (daily lifestyle). FIG. 3 is a functional block diagram for power generation control in the controller of the cogeneration device according to the present embodiment. 5 is a flowchart showing power generation control in the controller of the cogeneration device according to the present embodiment. FIG. 2 is a schematic diagram of a cogeneration device according to a modification of the present embodiment and a house in which the cogeneration device is installed. FIG. 7 is a control block diagram for power information prediction executed by a second control unit according to Example 1 of the present embodiment. FIG. 7 is a control block diagram for power information prediction executed by a second control unit according to Example 2 of the present embodiment. FIG. 7 is a control block diagram for power information prediction executed by a second control unit according to Example 3 of the present embodiment. FIG. 7 is a control block diagram for power information prediction executed by a second control unit according to Example 4 of the present embodiment.

FIG. 1 shows a schematic diagram of a household fuel cell cogeneration system (hereinafter simply referred to as "cogeneration system 10" in this embodiment) as an example of distributed power supply equipment according to the present embodiment. ing.

The cogeneration device 10 is a system that includes a tank unit and a fuel cell unit. Note that coexisting does not mean that they are physically adjacent, but rather that they cooperate with each other. That is, the tank unit and the fuel cell unit may be installed separately and connected by piping, electrical wiring, or the like.

As shown in FIG. 1, the cogeneration device 10 is installed along the outer wall of a house 12, and a worker goes to the site and performs the installation work.

FIG. 1 shows a state in which the installation work has been completed, the test run has been completed, and the system can be operated steadily in cooperation with various equipment (electrical equipment, hot water supply equipment, etc.) on the house 12 side.

(Configuration of cogeneration device 10)

Although not shown, the cogeneration device 10 includes a hot module, a power conditioner, an exhaust heat recovery device, a heat storage tank, a radiator, a heat exchanger, etc., each of which is controlled by a controller 14 to control a hot water supply related control section 27 and a power generation device. They are controlled in cooperation with each other via the related control section 29 (see FIG. 2).

The hot module uses a fuel processing device to extract hydrogen, supplies the extracted hydrogen to the fuel cell stack, and generates DC power using oxygen in the air.

A power conditioner converts the generated DC power into AC power and supplies it to a house.

The exhaust heat recovery device recovers heat from exhaust heat gas generated by power generation.

A heat storage tank can store heat recovered via a heating medium at high temperatures, and the stored heat is used when hot water is supplied.

A radiator causes a heat medium to radiate heat. A radiator is not required.

The heat exchanger uses the high temperature heat medium from the heat medium tank to heat the tap water. A heat exchanger is not required.

Further, the cogeneration device 10 can also send the generated power to the heat source device 16 via the power line 15. The heat source device 16 further heats the hot water heated by the cogeneration device 10 by burning city gas (for example, 13A) as needed, and supplies the heated water to the house 12.

As shown in FIG. 2, the controller 14 includes a microcomputer 28 composed of a CPU 18, a RAM 20, a ROM 22, an I/O 24, and a bus 26 such as a data bus or a control bus that connects these.

A hot water supply related control section 27 and a power generation related control section 29 are connected to the I/O 24, and operations associated with hot water supply and power generation are controlled by the controller 14.

A large-scale storage device 30 is also connected to the I/O 24, which stores processing programs related to power generation and hot water supply executed by the controller 14, as well as history information based on power generation (for example, in this embodiment, , communication interval adjustment information, etc.) are stored.

Furthermore, a remote control 32 is connected to the I/O 24. The remote control 32 is installed inside the house 12 in which the cogeneration device 10 is installed, and has a function that allows the user to input commands regarding the cogeneration device 10 (and the heat source device 16) and displays the status of the cogeneration device 10. It has functions such as

(Distributed power source configuration)

As shown in FIG. 1, in the distributed power source according to the present embodiment, the power generated by the commercial power source 34 and the cogeneration device 10 is used as the power source for the house 12.

Commercial power source 34 is connected to smart meter 36 . The smart meter 36 measures electric power information such as the current, electric power, and electric energy of the commercial power source 34, and transmits the measured information to a specific communication destination through the communication paths of route A, route B, and route C. Is possible.

That is, the A route is a communication path that connects the smart meter 36 and the electric power company, and the B route is a communication path that connects the smart meter 36 and the equipment installed in the house 12 (for example, if a HEMS is constructed, its controller, etc. ), and the C route is a communication route for providing data acquired by the power company via the A route to a third party (retail power company, etc.).

A power line 38 output from the smart meter 36 is wired to a distribution board 40 installed in the house 12.

In the distribution board 40, assuming that the smart meter 36 side is the upstream side, a service breaker 42, an earth leakage breaker 46, and a safety breaker 48 are installed in this order from the upstream side.

The service breaker 42 is a circuit breaker for determining contract capacity, but may not be installed.

The earth leakage breaker 46 is a circuit breaker that quickly senses and interrupts earth leakage in the internal wiring and electrical equipment of the house 12 to prevent electrical accidents.

The safety breaker 48 is attached to each of the branch circuits for transmitting power from the distribution board 40 to each usage location of the house 12, and is automatically activated when a short circuit or power usage exceeding a certain level is detected due to a failure of electrical equipment, etc. It is a circuit breaker that protects the circuit.

Here, the power generated by the cogeneration device 10 is combined with the commercial power source 34 via a dedicated safety breaker 48A provided in the distribution board 40, and is used as a power source for electrical equipment inside the house 12. I can do it.

Although not shown in the drawings, the cogeneration device 10 is provided with a power line dedicated to when the commercial power source 34 is out of power, so that the power generated by the cogeneration device 10 can be switched on when power is not supplied from the commercial power source 34 due to a power outage. , can be supplied through a power outage dedicated outlet installed in a part of the house 12.

Here, the controller 14 of the cogeneration device 10 needs to control the generated power according to the amount of power used in the house 12, which changes from moment to moment.

As an example, FIG. 3 shows a transition characteristic diagram of power usage, tank hot water storage volume, hot water supply usage, and gas usage based on living conditions (daily lifestyle). In FIG. 3, as an example, it is assumed that the rated power generation output of the cogeneration device 10 is 0.7kW, and if the power consumption in the house 12 is 0.7kW or less, the power consumption in the house 12 is only the power generation output. When the power exceeds 0.7 kW, control is shown in which the power is supplied by the generated power and the commercial power supply 34. Therefore, the controller 14 uses the B route communication path from the smart meter 36 to obtain power information such as the current, power, and amount of power of the commercial power source 34.

In this embodiment, the interval at which power information is acquired from the smart meter 36 via the B route communication path is set to once every 30 seconds. With this interval, it is possible to roughly follow the ever-changing power usage in the house 12 without violating various wireless communication standards, and to perform control approximating the power transition characteristics shown in FIG. 3.

By the way, in addition to communication with the controller 14 of the cogeneration device 10 via the B route, the smart meter 36 also performs other communications such as communication via the A route.

Therefore, if the controller 14 of the cogeneration device 10 attempts to acquire power information via the communication route B route at intervals of once every 30 seconds, the controller 14 of the cogeneration device 10 attempts to obtain power information via the communication route B route at intervals of once every 30 seconds. , specified low-power radio) interferes, or communication standby (carrier sense) for interference avoidance exceeds a specified number of times, and there is a possibility that communication for acquiring power information may fail (communication failure).

In the case of regular communication failures, it is possible to take drastic measures to ensure communication, but sporadic communication failures due to changes in the surrounding environment are also expected to occur. It is necessary to control power generation with safety in mind so that overcurrent etc. do not occur even during the period.

Therefore, in this embodiment, power generation control (control by the first control unit 70 shown in FIG. 4) is performed based on the acquired power information when communication is good, and power generation is performed based on alternative information in place of power information when communication is poor. control (control by the second control unit 72 shown in FIG. 4).

FIG. 4 is a functional block diagram for power generation control in the controller 14 of the cogeneration device 10. Each block in this functional block diagram is classified by function, and in this embodiment, based on the communication interval adjustment program stored in the ROM 22, the CPU 18 operates based on the communication interval adjustment program. It is executed as a control by Note that the operation program shown in some or all of the functional blocks may be operated by incorporating an IC chip such as an ASIC.

As shown in FIG. 4, the wireless communication unit 50 establishes a communication protocol for acquiring power information via the communication route B of the smart meter 36. In this embodiment, a communication protocol is established at a communication interval of once every 30 seconds as a default.

The wireless communication section 50 is connected to a power information acquisition section 54. When the communication protocol is established (successfully) in the wireless communication unit 50, the power information acquisition unit 54 acquires power information from the smart meter 36 via the communication route B.

The power information acquisition section 54 is connected to the power generation instruction section 55. The power generation instruction unit 55 determines the power generation output based on the power information (including real-time values and historical values) acquired by the power information acquisition unit 54, and instructs the system operation control unit 56 to determine the power generation output. The system operation control unit 56 sends a control instruction signal to necessary controlled devices of the cogeneration system 10 based on the instructed power generation output.

Thereby, the cogeneration device 10 can be operated with a power generation output that roughly follows the power consumption in the house 12.

On the other hand, the wireless communication section 50 is connected to a communication success/failure determination section 58. The communication success/failure determination unit 58 determines whether the wireless communication unit 50 has succeeded in establishing a communication protocol at a predetermined interval. Note that the wireless communication section 50, the power information acquisition section 54, and the communication success/failure determination section 58 constitute the first control section 70 of this embodiment.

The communication success/failure determination unit 58 determines the success or failure of the communication, and if the communication is determined to be successful, it is in a standby state, but if the communication is determined to be a failure, information replacing the power information (substitute) is determined by another means. information), a startup instruction is output to the alternative information acquisition section 74 of the second control section 72.

Upon receiving the activation instruction from the communication success/failure determination unit 58 , the alternative information acquisition unit 74 acquires alternative information and sends it to the power information prediction unit 76 .

Here, while the first control unit 70 controls the power generation output when communication is successful, the second control unit 72 has a role as a backup control, and works with the alternative information acquisition unit 74 and power information prediction. 76.

Note that various information sources can be used as sources of the alternative information acquired by the alternative information acquisition unit 74, and will be explained in detail in Examples 1 to 4, which will be described later.

The power information prediction unit 76 predicts power information based on the received alternative information.

That is, the first control unit 70 can directly acquire power information from the smart meter 36, whereas the second control unit 72 can acquire power information based on various alternative information that can predict the power information. By predicting power information using calculations, prediction models, etc., we try to get it as close to actual power information as possible.

The power information prediction section 76 is connected to the power generation instruction section 55. The power generation instruction unit 55 determines the power generation output based on the power information (including real-time values and historical values) acquired by the power information acquisition unit 54, and instructs the system operation control unit 56 to determine the power generation output. The system operation control unit 56 sends a control instruction signal to necessary controlled devices of the cogeneration system 10 based on the instructed power generation output.

Thereby, the cogeneration device 10 can be operated with a power generation output that roughly follows the power consumption in the house 12. Although the power generation control performed by the second control section 72 is inferior to the power generation control performed by the first control section 70, it is useful as an alternative function in the event of a communication failure in which power information cannot be obtained.

The operation of this embodiment will be explained below according to the flowchart of FIG.

FIG. 5 is a flowchart showing a power generation control routine executed by the controller 14 of the cogeneration device 10.

In step 100, the default value of the communication interval (in this embodiment, once every 30 seconds) is read, and the process moves to step 102.

In step 102, it is determined whether the communication interval has elapsed, and if the determination is affirmative, the process proceeds to step 104, where power information is requested from the smart meter 36 via the B route communication path, and the process proceeds to step 106. do.

In step 106, it is determined whether power information has been acquired in response to the request in step 104.

If an affirmative determination is made in step 106 (if communication is successful), the process moves to step 108, and the power generation output is specified based on the power information.

The power generation output may be determined from the calculation results of a calculation formula that uses power information as a parameter, or by applying prediction information as an input source to a predetermined prediction model and using AI such as machine learning or deep learning. You can also find it by learning.

When the power generation output is specified in step 108, the process moves to step 116, where the operation of each controlled device of the cogeneration system 10 is controlled, and the process returns to step 102.

On the other hand, if a negative determination is made in step 106 (in case of communication failure), the process moves to step 110 and alternative information is obtained (see Examples 1 to 4 described later).

The next step 112 is to predict power information based on the alternative information. Since the prediction of this power information differs depending on the first to fourth embodiments, a description thereof will be omitted here.

In the next step 114, the power generation output is specified based on the predicted power information.

Similar to when power information is directly acquired from the smart meter 36, the power generation output may be determined from the calculation result of a calculation formula that uses power information as a parameter, or the prediction information may be input to a predetermined prediction model. It may be applied as a source and determined by learning using AI such as machine learning or deep learning.

When the power generation output is specified in step 114, the process proceeds to step 116, where the operation of each controlled device of the cogeneration system 10 is controlled, and the process returns to step 102.

As described above, in this embodiment, the controller 14 of the cogeneration device 10 is provided with the first control section 70 and the second control section 72, and when communication is successful, power information is sent from the smart meter 36 at predetermined intervals. is acquired, the first control unit 70 controls to specify the power generation output based on the acquired power information and control each controlled device. When power information cannot be acquired at a predetermined interval, alternative information is acquired under the control of the second control unit 72, power information is predicted from this alternative information, power generation output is specified, and each control target is Now you can control the device. Therefore, even if a communication failure occurs sporadically, the power generation output can be followed within the tolerance for the actual lifestyle.

Note that in this embodiment, the second control unit 72 predicts power information when communication fails; however, even if communication does not fail, power generation control and second control by the first control unit 70 are performed. The power generation control by the unit 72 may be processed in parallel. In this case, it is preferable to add a function to mediate commands from both sides. For example, simple selection such as prioritization, average value, maximum value, minimum value, etc. may be used, or learning may be performed based on history.

(Modified example)

The controller 14 of the cogeneration device 10 according to the present embodiment acquires power information directly from the smart meter 36 installed in the house 12 via route B.

Here, as shown in FIG. 6, a HEMS 62 is constructed in the house 12 according to the modified example.

The HEMS 62 saves electricity and gas used in the house 12 by managing it in real time, and also helps prevent global warming by reducing carbon dioxide.

By connecting home appliances and the like to the HEMS controller 64 built into the HEMS 62 and managing the usage status of electricity and gas on a monitor, visualization (monitor display) is realized and the home appliances are automatically controlled.

By the way, the HEMS 62 acquires data that is the basis of management from the smart meter 36. In other words, the HEMS controller 64 of the HEMS 62 has acquired the same power information as the smart meter 36.

Therefore, in the modified example, Wi-SUN HAN wireless communication, Wi-SUN Enhanced HAN wireless communication, specified low power wireless communication, LPWA (Low Power Wide Area ) to establish a communication protocol and obtain power information from the HEMS controller 64.

Since the power information obtained from the HEMS controller 64 is equivalent to the power information obtained from the smart meter 36, for example, if radio interference occurs on the B route communication path of the smart meter 36, the HEMS 62 should be installed. , and the HEMS controller 64, it is possible to improve the communication success rate.

In the following, an example for acquiring alternative information necessary when the second control unit 72 executes power generation control in the present embodiment and modified examples will be described.

(Example 1)

As shown in FIG. 7, in the first embodiment, a date and time device 80 and a date and time information-power information database 82 are connected to the alternative information acquisition unit 74.

When the alternative information acquisition unit 74 acquires the current date and time information from the date and time device 80 , it predicts power information based on the date and time information-power information database 82 and sends it to the power information prediction unit 76 .

Specific examples using date and time information are shown below in (1) to (4).

(1) The period from 0:00 am to 6:00 am is assumed to be the customer's sleeping time, and the power generation output during this time period is suppressed.

(2) The value shall be the same as the power generation output at the same time the previous day.

(3) The power generation output at the same time on the most recent day of the week is the same value, or the average value, maximum value, minimum value, or mode value at the same time on multiple days of the week.

(4) The average value, maximum value, minimum value, or mode of multiple previous power generation outputs at the same time.

(Example 2)

As shown in FIG. 8, in the second embodiment, the second control unit 72 includes a network I/F 84 and can access the operating information storage server 88 of the cogeneration device 10 via the network 86. . A plurality of other cogeneration devices 10 are connected to the network 86, and the operation information database 88A of the operation information storage server 88 stores operation information (so-called big data) of the plurality of cogeneration devices 10. It turns out.

The alternative information acquisition unit 74 searches the operation information database 88A of the operation information storage server 88 for power demand of other users with similar load patterns via the network I/F 84, and searches for similar power demand. Obtain as alternative information.

The alternative information acquisition unit 74 sends the acquired similar power demand to the power information prediction unit 76 .

The power information prediction unit 76 makes the power information to be predicted the same as the received similar demand power, or predicts the power information with reference to time-series power generation information such as cumulative power amount, load fluctuation, rated output, etc. over a certain period. do.

(Example 3)

As shown in FIG. 9, in the third embodiment, a calculation standard setting section 90 and a time-series power generation information database 92 are connected to the alternative information acquisition section 74.

The alternative information acquisition unit 74 selects one of the maximum value, minimum value, mode, and average value from the calculation standard setting unit 90, and based on the time series power generation information imported from the time series power generation information database 92, Obtain alternative information for power information.

That is, past current value information and power value information are used to predict current power demand through learning, and power generation output is controlled.

Specifically, the maximum value, minimum value, mode, and average value of power generation output over a certain period in the past are used as alternative information, or "power generation output (maximum value, minimum value, mode, average value) x constant ”. The constant is a value determined from the ratio of opportunity loss and reverse flow loss.

(Example 4)

As shown in FIG. 10, in the fourth embodiment, a calculation standard setting section 90 and a resident presence/absence determination section 96 are connected to the alternative information acquisition section 74.

The alternative information acquisition unit 74 selects one of the maximum value, minimum value, mode, and average value from the calculation standard setting unit 90, and determines whether or not there is a resident imported from the resident presence/absence determination unit 96. Obtain alternative information for power information based on the information.

That is, the resident presence/absence determination unit 96 receives hot water supply, heating information, power load increase information, remote control operation information, etc. as daily life information of the house 12, and takes these into consideration to determine whether a resident is present in the house 12. Specify whether or not to do so.

Specifically, if there is a hot water supply/heating load from a heat source device within a certain period of time in the past, if an increase in electric power load is confirmed, or if a history of remote control operations etc. has been obtained, It determines that you are at home and outputs a certain preset value, or outputs the maximum, minimum, mode, and average of the power output over a certain period of time.

The example of obtaining alternative information is not limited to the above embodiments 1 to 4, and as a result, alternative information within a predetermined allowable range is obtained for the power information directly obtained from the smart meter 36. Any method is fine. Furthermore, information such as weather, temperature, humidity, etc. may be added to the correction coefficients in Examples 1 to 4.

Furthermore, when HEMS 62 (modified example configuration) is installed, power information may be predicted from the operating status of equipment connected to HEMS 62 when communication with smart meter 36 fails. .

Further, the gist of the present invention is to predict power information from alternative information when communication with the smart meter 36 fails, but when the HEMS 62 is installed, the operation of the equipment connected to the HEMS 62 may be controlled. In other words, when power generation output is controlled by predicting power information, it is possible to approach a highly efficient power generation output by controlling the power consumption of the device.

Note that the combination of distributed power sources is not limited to the commercial power source 34 and the cogeneration device 10, but also when combined with other renewable energies such as solar power generation, geothermal power generation, wind power generation, storage batteries, etc., from the smart meter 36, etc. The present invention is applicable to all configurations that acquire power information and control power generation output.

10 Cogeneration device 12 House 14 Controller 15 Power line 16 Heat source device 18 CPU
20 RAM
22 ROM
24 I/O
26 Bus 27 Hot water supply related control unit 28 Microcomputer 29 Power generation related control unit 30 Large scale storage device 32 Remote control 34 Commercial power supply 36 Smart meter 38 Power line 40 Distribution board 42 Service breaker 46 Earth leakage breaker 48 Safety breaker 48A Safety breaker 50 Wireless Communication Department (Communication Department)
54 Power information acquisition unit (acquisition unit)
55 Power generation instruction unit 56 System operation control unit 58 Communication success/failure determination unit 62 HEMS
64 HEMS controller 70 First control section 72 Second control section 74 Alternative information acquisition section 76 Power information prediction section 80 Date and time device 82 Date and time information - power information database 84 Network I/F
86 Network 88 Operation information storage server 88A Operation information database 90 Calculation standard setting unit 92 Time series power generation information database 96 Resident presence/absence determination unit

Claims (4)

A power monitoring and control device that acquires power information from a smart meter connected to a power lead-in line for bringing commercial power indoors,
a communication unit that establishes wireless communication with the smart meter;
an acquisition unit that acquires power information associated with indoor power consumption through communication by the communication unit;
a first control unit that controls the power generation output of the distributed power source based on the power information acquired by the acquisition unit;
a second control unit that controls the power generation output of the distributed power source based on power information predicted from alternative information that replaces the power information that the acquisition unit should acquire ;
The alternative information is similar operating information obtained from a server that receives and stores operating information from distributed power sources installed in each of a plurality of houses via a network, and based on the similar operating information, control power generation output,
Power monitoring and control equipment. The second control unit is executed in place of the first control unit when a communication failure occurs in the communication unit, or when a communication failure does not occur but the power change prediction is determined to be necessary. Item 1. The power monitoring and control device according to item 1. The distributed power source is
The fuel cell cogeneration system according to claim 1 or 2 , wherein the fuel cell cogeneration system is provided with a power generation section that generates power using gas and a hot water generation section that generates hot water using heat generated during power generation. Power monitoring and control equipment. computer,
Operated as the power monitoring control device according to any one of claims 1 to 3 ,
Power monitoring control program.