JP5780827B2 - Energy management method, energy management program, energy management device, energy management system - Google Patents

Description

  Embodiments described herein relate generally to an energy management method, an energy management program, a control device, and an energy management system.

  In an energy management system including solar power generation and a fuel cell, the fuel cell is operated so as to follow a hot water supply load (heat load). Therefore, even if the power load is small, the operation is not necessarily performed following the power load. Insufficient power is supplied to a load of home appliances by receiving power from a solar power generation device or a commercial system (for example, see Non-Patent Document 1).

JP 2006-121853 A

Operations Research Vol. 54, No. 6, “Optimal Operation Control of Household Fuel Cell Cogeneration System”, pages 325-328

  When the received power is positive in the above-described power system excluding solar power generation, a part of the power generated by solar power generation is supplied to the load.

  Therefore, the electric power generated by the solar power generation device cannot be reduced to the commercial system as much as possible, and the burden reduction amount of the electric power supply of the commercial system is not maximized.

  The energy management method, the energy management program, the control device, and the energy management system of the present embodiment are designed to reduce the power supply amount from the commercial system to the maximum by causing the power generated by the photovoltaic power generator to reversely flow to the commercial system. Make it possible.

According to the embodiment, the photovoltaic power generation apparatus linked to the commercial system can supply power to the power load, and the circuit configuration connects the surplus power of the generated power to the commercial system so that the power can be sold. of the control device for controlling the output from the fuel cell, a determination process generated power or less or more than the threshold of the photovoltaic device, when said by determination processing Ru is determined to be the threshold value or more, The fuel cell output set value is calculated based on the power demand of the power load with the output upper limit value of the fuel cell as the upper limit, and when it is determined by the determination process that it is less than the threshold value, the fuel cell is based on the predicted hot water usage value a calculating process for calculating the output set values, to realize a control process for controlling the fuel cell based on the fuel cell output setting value that will be calculated by the calculation processing.

The block diagram which shows an example of a structure of the energy management system which concerns on 1st Embodiment. The figure which shows an example of the table which stores the threshold value of the photovoltaic power generation concerning 1st Embodiment. The figure which shows an example of the table which stores the electric power generation amount of the solar power generation concerning 1st Embodiment. The graph which shows an example of the electric power generation amount of the solar power generation concerning 1st Embodiment. The figure which shows an example of the table which stores the past hot water usage which concerns on 1st Embodiment. The figure which shows an example of the table which stores the present hot water storage rate which concerns on 1st Embodiment. The figure which shows an example of the table which stores the fuel cell output upper limit which concerns on 1st Embodiment. The figure which shows an example of the table which stores the electric power demand amount which concerns on 1st Embodiment. The graph which shows an example of the electric power demand amount which concerns on 1st Embodiment. The figure which shows an example of the table which stores the fuel cell output setting value which concerns on 1st Embodiment. The graph which shows an example of the fuel cell output which concerns on 1st Embodiment. The flowchart which shows an example of operation | movement of the control apparatus which concerns on 1st Embodiment. The graph which combined and described the photovoltaic power generation concerning 1st Embodiment, an electric power demand, and a fuel cell output. The block diagram which shows an example of a structure of the energy management system which concerns on 2nd Embodiment. The figure which shows an example of the table which stores the storage battery output upper limit which concerns on 2nd Embodiment. The figure which shows an example of the table which stores the fuel cell and storage battery output setting value which concerns on 2nd Embodiment. The graph which shows an example of the photovoltaic power generation concerning 2nd Embodiment, an electric power demand, and a fuel cell and storage battery output. The figure which shows an example of the table which stores the fuel cell and storage battery output setting value which concerns on 2nd Embodiment. The graph which shows an example of the photovoltaic power generation concerning 2nd Embodiment, an electric power demand, and a fuel cell and storage battery output. The flowchart which shows an example of operation | movement of the energy management system which concerns on 2nd Embodiment. The figure which shows an example of the table which stores the amount of received electric power which concerns on 2nd Embodiment. The figure which shows the modification 1 of 1st, 2nd embodiment. The figure which shows the modification 1 of 1st, 2nd embodiment. The figure which shows the modification 2 of 1st, 2nd embodiment. The figure which shows the modification 3 of 1st, 2nd embodiment.

  Hereinafter, embodiments of the energy management system will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing an example of the configuration of the energy management system according to the present embodiment.

The information providing system shown in FIG. 1 includes a control device 10, a photovoltaic power generation device 20, a photovoltaic power generation power measurement device 21, a commercial system 30, a fuel cell 40, a fuel cell hot water storage amount measurement device 41, a load 60, and a receiving end power measurement. The computer system includes a device 71. The solar power generation device 20 and the fuel cell 40 are connected to the commercial system 30 and connected to the load 60 so that power can be supplied. When the generated power of the solar power generation device 20 and the fuel cell 40 is larger than the power load, the surplus power is sold to the commercial system 30, and when the generated power is smaller than the power load, the shortage is Receive power from 30.

  In the present embodiment, the control device 10 that is one of the components of the information providing system can be configured by a computer group in which devices are combined via a LAN, an intranet, or the like according to a processing function.

  The communication network 1 is a network network capable of one-way or two-way communication. In the present embodiment, the network 1 is described as a wired communication network such as a LAN or an intranet, but can be replaced with various wireless communication networks. Also, the wired connection method is not limited to this.

  The power transmission network 2 is a cable for transmitting power. The power supply to the load 60 may be performed by wireless power feeding through a wireless power feeding facility such as an electromagnetic induction method or a magnetic field resonance method.

  The control device 10 includes a CPU 100, a RAM (RWM) 110, a communication IF 120, an input IF 130, a display IF 140, a ROM 150, and a storage unit 160. In addition, another IF such as an IF (interface) to which an external storage device such as a USB memory is attached may be provided.

  The CPU 100 is an arithmetic processing unit (for example, a microprocessor) that reads each program written in advance in the ROM 150 into the RAM 110 and performs arithmetic processing.

  The RAM (RWM) 110 is used as a working area such as a storage area for temporarily storing data when the CPU 100 executes a program.

  The communication IF 120 is an interface that connects the communication unit 121. This IF is not an essential component and may be directly connected to the wiring in the server without the IF.

  The communication unit 121 is a communication device or a communication unit that communicates with the solar power generation device 20, the fuel cell device 40, the solar power generation measurement device 21, or the power receiving end power measurement device 71. For example, a communication device such as a router is used for wired connection and an antenna is used for wireless connection. In addition, a communication device that performs infrared communication, visible light communication, or the like may be used.

  In this embodiment, the communication IF is described as one communication IF, but the communication power supply measuring device 21, the hot water storage amount measuring device 41, and the power receiving end power measuring device 71 are provided with a plurality of communication IFs. May be.

  The input IF 130 is an interface that connects the input unit 131 and the control device 10. Upon receiving a signal from the input unit 131, input control such as returning to a signal that can be recognized by the CPU 100 may be performed. This IF is not an essential component and may be directly connected to the wiring in the server without the IF.

  The input unit 131 is an input device or an input unit that performs input control of various keyboards and buttons that are generally provided in a computer device. In addition, a function of recognizing an input signal by recognizing a voice uttered by a person may be provided.

  The display IF 140 is an interface that connects the display unit 141 and the control device 10. Display control of the display unit 141 may be performed from the CPU 100 via the display IF 141, or a display control function may be provided in this IF by an LSI (GPU) that performs drawing processing such as a graphic board. It may be configured to be directly connected to the inside of the control device 10 without using the IF.

  The display unit 141 is a monitor such as a liquid crystal display, an organic EL display, or a plasma display. In addition, an output function for generating sound may be provided.

  The ROM 150 is a program memory that stores programs. In general, a non-primary storage medium that cannot write data is suitable, but a storage medium such as a semiconductor memory that can read and write data at any time may be used. In addition, a display program for displaying characters and symbols that can be recognized by a person on the display unit 141, an information registration program for registering information in each DB and ROM, a communication control program for controlling communication of the communication unit 121, and the like are stored. Also good.

  The ROM 150 stores a photovoltaic power generation determination program 151, a hot water usage prediction program 152, a fuel cell output calculation program 153, and a fuel cell control program 154.

  The photovoltaic power generation determination program 151 is a means for causing the CPU 100 to realize a function of comparing the power value measured by the photovoltaic power generation power measuring device 21 with the generated power lower limit value stored in the threshold value table of the generated power DB 161.

  Moreover, as a result of comparing the generated power, the photovoltaic power generation determination program 151 determines that power generation by the photovoltaic power generation apparatus is performed when the generated photovoltaic power is equal to or higher than the generated power lower limit value, and the generated power lower limit When it is less than the value, the CPU 100 is caused to realize a function of determining that power generation is not performed by the solar power generation device. The determination result is stored in the primary RAM 110 and is used for the next prediction of hot water usage.

  The hot water usage prediction program 152 is a means for causing the CPU 100 to realize a function of predicting the daily hot water usage using the past hot water usage. The amount of hot water used in the same season last year stored in the hot water usage prediction DB 162 and the amount of hot water used on the same day of the week before are read out, and a predicted value of the daily hot water usage is calculated. In addition, when the external hot air temperature is stored in the hot water usage prediction DB 162, the predicted value may be calculated using the value, or a mathematical formula incorporated in the program may be used. In addition to temporarily storing the calculated predicted value in the RAM, it may be stored in the hot water usage prediction DB 162 for use in the next processing.

  The fuel cell output calculation program 153 is a means for causing the CPU 100 to realize a function of calculating the fuel cell output set value so that the power receiving end power measured by the power receiving end power measuring device 71 is exactly 0 (zero).

Specifically, when the photovoltaic power generation amount program 151 determines that the photovoltaic power generation apparatus is generating power, the values of the fuel cell output and the receiving end power stored in the fuel cell output calculation DB 163 are set. Read
Fuel cell output set value = fuel cell output + receiving end power (Formula 1)
To calculate the fuel cell output set value. The calculated fuel cell output set value is compared with the fuel cell output upper limit value stored in the fuel cell output upper limit DB 163.

As a result of the comparison, when the fuel cell output set value calculated by reading (Equation 1) exceeds the fuel cell output upper limit value, the value is read from the fuel cell output upper limit value table, and the fuel cell output set value = fuel cell Output upper limit (Formula 2)
The fuel cell output set value calculated by (Equation 1) is stored in the DB 163 as the fuel cell output upper limit value.

  Moreover, when it determines with the photovoltaic power generation amount program 151 not having produced electric power by a photovoltaic power generation apparatus, the calculation using said (Formula 1) and (Formula 2) is performed as a 1st step. Furthermore, the predicted value of the hot water storage amount when the fuel cell 40 is operated with the fuel cell output set value calculated by (Equation 1) or (Equation 2) is predicted by executing the hot water usage prediction program 152. When the amount of hot water is exceeded, the hot water storage amount measured by the hot water storage amount measuring device 41 is read from the hot water storage amount table, and the fuel cell output set value is changed by (Equation 3).

Fuel cell output set value = (Predicted hot water usage-Hot water storage) / (Operating time x Thermoelectric ratio) (Formula 3)
The fuel cell control program 154 transmits the fuel cell output set value calculated by the fuel cell output calculation program 153 read from the fuel cell calculation DB 163 or temporarily stored in the RAM 110 to the fuel cell 40, and the output of the fuel cell 40 is This is a means for causing the CPU 100 to realize the function of controlling the fuel cell 40 so as to coincide with the fuel cell output set value.

  The storage unit 160 is a non-volatile storage device such as a hard disk drive (HDD) or storage means. In addition, various kinds of storage media such as a semiconductor memory (flash memory, FeRAM, ReRAM, MRAM, PRAM, SSD) may be used without being limited to the non-volatile storage means. A storage medium that employs a combination of the above may be used. In the present embodiment, the ROM 150 and the storage unit 160 are described as different storage media, but the same storage unit and storage unit for storing various DBs and programs may be used.

  The storage unit 160 stores a photovoltaic power generation DB 161, a hot water volume prediction DB 162, a fuel cell output calculation DB 163, and a fuel cell control DB 164. In addition, data necessary for the arithmetic processing by the CPU 100 is stored.

  The photovoltaic power generation DB 161 is a power generation lower limit value that is a value used when the CPU 100 that executes the photovoltaic power generation determination program 151 determines whether the amount of power generated by the photovoltaic power generation measurement device 21 is equal to or greater than a certain value. (Threshold) is stored. For example, it is stored in the form of a threshold table described in FIG. Moreover, you may store the value which the photovoltaic power generation measuring device 21 measured in the table format which describes in the photovoltaic power generation amount history table of FIG. In addition, when the photovoltaic power generation amount history table of FIG. 3 is graphed, it can be shown as in FIG.

  The hot water usage prediction DB 162 stores the hot water usage of the same season last year and the hot water usage of the same day of the week before. For example, the table format shown in FIG. In addition, values such as external temperature may be stored. Moreover, the hot water storage amount of the hot water storage measuring device 41 is stored. The hot water storage amount is stored as a hot water storage rate in a table format as shown in FIG.

  The fuel cell output calculation DB 163 includes the value of the fuel cell output received from the power conditioner of the fuel cell, the value of the receiving end power (power demand) measured by the receiving end power measuring device 71, and the upper limit value of the fuel cell output. Store. For example, the fuel cell output upper limit value is stored in a table format as shown in FIG. 7, and the power demand value is stored in a table format as shown in FIG. When the value of power demand is graphed, it can be shown as in FIG. Further, the fuel cell output setting value calculated by the fuel cell output calculation program 153 is stored. For example, it is stored in a table format as shown in FIG. When the values shown in FIG. 10 are graphed, they can be expressed as shown in FIG.

  The fuel cell control DB 164 stores data necessary for executing the fuel cell control program 154.

  The solar power generation device 20 includes a solar battery panel and a power conditioner (not shown). The power conditioner includes a conversion device that converts DC power generated by the power generation device into AC power, and a control device that adjusts the output of the power. In this embodiment, although the photovoltaic power generation measuring device 21 and the power conditioner are described separately, the power conditioner may be provided with a power measuring device and a power measuring function.

  The photovoltaic power generation measuring device 21 measures output power (AC power) from the photovoltaic power generation device 20. Note that the DC power may be measured.

  The commercial (power supply) system 30 supplies power to the load 60. In addition, power generated by solar power generation or the like can be received.

  The fuel cell 40 includes a reformer that reforms the fuel gas to generate hydrogen gas, a fuel battery cell that generates direct-current power by combining the hydrogen gas output from the reformer with oxygen in the air, and This is a configuration including a power conditioner (not shown) that converts DC power generated by the fuel cell into AC power. The fuel cell 40 includes a hot water storage tank that collects heat generated during power generation to boil hot water and store the hot water. The power generated by the fuel cell 40 is controlled so as not to exceed the load 60.

  The hot water storage amount measuring device 41 measures (detects) the hot water amount stored in the hot water storage tank in the fuel cell 40 by the hot water storage amount measuring device 41.

  The load 60 is a power supply target. Home appliances such as lighting, washing machine, refrigerator, air conditioner, TV.

  The power receiving end power measuring device 71 measures (detects) the power received by the power distribution circuit including the fuel cell 40 and the load 60 excluding the solar power generation device 1.

  Next, operation | movement of the control apparatus 10 is demonstrated using FIG.

  The CPU 100 executes the photovoltaic power generation determination program 151, compares the power value measured by the photovoltaic power generation power measuring device 21 with the generated power lower limit value stored in the generated power DB 161, and generates power by the solar power generation device. It is determined whether or not it has been performed (step S101).

  If it is determined that power is being generated by the solar power generation device, the values of the fuel cell output and the receiving end power stored in the fuel cell output calculation DB 163 are read out, and the fuel cell output from (Equation 1) Calculate the set value. The calculated fuel cell output set value is compared with the fuel cell output upper limit value stored in the fuel cell calculation DB 163.

  As a result of the comparison, when the fuel cell output set value calculated by reading (Equation 1) exceeds the upper limit value of the fuel cell output, the fuel cell output setting calculated by (Equation 2) to (Equation 1) below The value is set as the fuel cell output upper limit value (step S102).

  When it is determined that power generation is not performed by the solar power generation device, first, calculation using (Formula 1) and (Formula 2) is performed. Furthermore, the predicted hot water storage amount when the fuel cell 40 is operated according to the fuel cell output set value calculated by (Equation 1) or (Equation 2) is predicted by executing the hot water usage prediction program 152. Is exceeded, the hot water storage amount measured by the hot water storage amount measuring device 41 is read from the measurement value DB 165, and the fuel cell output set value is changed by (Equation 3) (step S103).

  After step S102 or S103, the CPU 100 causes the fuel cell control program 154 to transmit the fuel cell output setting value calculated by the fuel cell output calculation program 153 to the fuel cell 40, and the output of the fuel cell 40 is the fuel cell output setting. The fuel cell 40 is controlled to match the value (step S104).

  FIG. 13 is a diagram in which FIGS. 4, 9, and 11 are overlapped. From FIG. 13, in the region 2 during solar power generation, the fuel cell output is controlled so as to be as close as possible to the power demand. In region 1, control is not performed to meet the power demand.

  In this way, output control based on the power load is performed during the period when the fuel cell output is generated by solar power generation, and output control based on the predicted amount of hot water is performed during other periods. It is possible to reversely flow the power generated by the apparatus to the commercial system as much as possible, reduce the power supply amount of the commercial system, and stabilize the power supply.

(Second Embodiment)
A second embodiment will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the structure same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The main differences between the present embodiment and the first embodiment are that a storage battery 50 is provided as shown in FIG. 14, a fuel cell / storage battery output calculation program 155, a fuel cell / storage battery output control program 156 in the ROM 150. And a fuel cell / storage battery DB 165 and a fuel cell / storage battery control DB 166.

  The storage battery 50 is a so-called secondary battery including a power storage device and a power conditioner that controls charging and discharging thereof. This power conditioner controls the power storage device so that the charge / discharge power of the power storage device matches the command value of the charge / discharge power received from the control device 10.

  The fuel cell / storage battery output calculation program 155 has a function of calculating the storage battery output set value and / or the fuel cell output set value so that the power receiving end power measured by the power receiving end power measuring device 71 is exactly 0 (zero). This means is realized by the CPU 100.

Specifically, when the photovoltaic power generation amount program 151 is executed and it is determined that power is generated by the photovoltaic power generation device, the value of the receiving end power stored in the fuel cell / storage battery output calculation DB 165 is set to Read
Storage battery output set value = Receiving end power (Formula 4)
To calculate the storage battery output. The receiving end power is a value obtained by subtracting the current value of the fuel cell output from the power demand. The current value of the fuel cell output is the value of the output of the fuel cell that operates so as to follow the heat load.

  If the storage battery output calculated in (Expression 4) exceeds the storage battery output upper limit, the storage battery output is set to the storage battery output upper limit as shown in (Expression 5), and the shortage is expressed as in (Expression 6). This can be dealt with by increasing the output of the fuel cell.

Storage battery output = Storage battery output upper limit (Formula 5)
Fuel cell output = Fuel cell output current value + (Receiving end power−Storage battery output upper limit value) (Formula 6)
Note that by adjusting the fuel cell output and / or the storage battery output so that the power at the receiving end is constant, the fluctuation of the supplied power is reduced, so that the burden on the commercial system can be reduced. The storage battery output upper limit value is a form in which a value corresponding to the amount of stored electricity in advance is stored in a table format and a value read from the value may be used, or read from a table storing a predetermined value. Also good.

  If the output of the storage battery + fuel cell is not enough to meet the power demand, the power from the commercial system or the photovoltaic power is used.

When it is determined that the photovoltaic power generation program 151 is executed and the photovoltaic power generation apparatus is not generating power,
The fuel cell output is set using (Equation 1) to (Equation 3). If there is a difference between the power load and the fuel cell output, the storage battery output set value to be supplemented by the storage battery output and the amount of power received from the commercial system = receiving end power-current value of fuel cell output-amount of power received from the commercial system
(Formula 7)
In this case, there is no need to receive power from a commercial system.

  In addition, when it is determined that solar power generation is not performed, various setting methods can be used for the output of the fuel cell / storage battery output.

For example, as shown in FIG.
Fuel cell output upper limit> Electric power demand (Formula 8)
Or as shown in FIG. 19 (fuel cell output upper limit value + constant power reception amount)> power demand (Formula 9)
In this case, the fuel cell output and the storage battery are set so that the storage battery is charged with power from the commercial system. By doing in this way, it is possible to charge the storage battery by using the power in the time zone where the power demand is small (night in this embodiment), and for further leveling and stabilization of the power supply from the commercial system Can contribute.

  The fuel cell / storage battery control program 156 has a function of changing the output set values of the fuel cell 40 and the storage battery 13 in accordance with the fuel cell output and storage battery output calculated by executing the fuel cell / storage battery output calculation program 155. This means is realized by the CPU.

  Further, the fuel cell / storage battery control means 156 fully charges the storage battery 13 using cheap nighttime power using (Equation 8) and (Equation 9), and performs sufficient discharge operation of the storage battery during solar power generation. It is also a means for causing the CPU 100 to realize the function of controlling the storage battery 13 so as to be possible.

  The fuel cell / storage battery DB 165 includes the value of the fuel cell output received from the power conditioner of the fuel cell, the value of the receiving end power (power demand) measured by the receiving end power measuring device 71, the output upper limit value of the storage battery, The fuel cell output upper limit value is stored. For example, the output upper limit value of the storage battery is stored in a table format as shown in FIG. The output upper limit value and the power demand value of the fuel cell are the same as those shown in FIGS. Further, the fuel cell output setting value calculated by the fuel cell output calculation program 153 is stored. For example, it is stored in a table format as shown in FIGS. When the values shown in FIGS. 16 and 18 are graphed, they can be expressed as shown in FIGS.

  The fuel cell / storage battery control DB 166 stores data necessary for the execution of the fuel cell / storage battery control program 155.

  As can be seen from FIG. 17 and FIG. 19, in the time zone in which photovoltaic power generation is occurring, the total output of the fuel cell and the storage battery is operated so as to follow the power load. In other time zones, the fuel cell is operated to follow the heat load. Further, the storage battery is controlled so that the amount of received power is constant. The power reception amount to be constant may be a predetermined value as shown in FIG. 21 or may be read from a table stored in the storage unit 160 so as to become a different constant value according to the power demand.

  In the operation of FIG. 17 and FIG. 19, the sharing of output between the fuel cell and the storage battery in the photovoltaic power generation is different, and FIG. 17 is a case where the capacity of the storage battery is relatively large. The fuel cell output is smaller than the power load even during a certain time period, and follows the power load together with the output from the storage battery. FIG. 19 shows a case where the capacity of the storage battery is relatively small. In the time zone where solar power generation is occurring, the maximum possible fuel cell output is taken and the remainder is shared by the storage battery. In either case of FIGS. 17 and 19, it is preferable that the storage battery is charged at night.

  Next, operation | movement of the control apparatus 10 is demonstrated using FIG.

  The CPU 100 executes the photovoltaic power generation determination program 151, compares the power value measured by the photovoltaic power generation power measuring device 21 with the generated power lower limit value stored in the generated power DB 161, and generates power by the solar power generation device. It is determined whether or not it has been performed (step S201).

  If it is determined that power is being generated by the solar power generation device, the values of the fuel cell output and the receiving end power stored in the fuel cell output calculation DB 163 are read out, and the fuel cell output from (Equation 4) Calculate the set value. The calculated fuel cell output set value is compared with the fuel cell output upper limit value stored in the fuel cell calculation DB 163.

  As a result of comparison, when the storage battery output set value calculated by reading (Formula 4) exceeds the storage battery output upper limit value, the storage battery output set value calculated by the following (Formula 5) to (Formula 4), Use the storage battery output upper limit. If the power demand is insufficient, the fuel cell output set value is further changed by (Equation 6) (step S202).

When it is determined that power generation is not being performed by the solar power generation device, the storage battery and / or the fuel cell output is set using the fuel cell output (Formula 1) to (Formula 3). If not enough, the difference between the power load and the fuel cell output is compensated by the power generated by solar power generation and the amount of power received from the commercial system (Formula 7)
(Step S203).

  After step S202 or S203, the CPU 100 causes the fuel cell / storage battery control program 154 to transmit the fuel cell output set value calculated by the fuel cell output calculation program 153 to the fuel cell 40, and the output of the fuel cell 40 is the fuel cell. The fuel cell 40 is controlled so as to coincide with the output set value (step S204).

<Modification 1>
In addition, the control device 10 according to the present embodiment is described as realizing a function by reading a program from one CPU 100 (arithmetic processing unit) and one ROM 150, but may include a plurality of CPUs and ROMs. For example, as shown in FIG. 22, a solar power generation determination unit 151 that determines whether solar power generation is performed as a set of these CPUs and ROMs, and predicts the amount of hot water used based on the amount of hot water used in the past. A control device configured to include a hot water usage prediction unit 152 to perform, a fuel cell output calculation unit 153 that calculates a set value of the fuel cell output, and a fuel cell control unit 154 that controls the set value to match the actual fuel cell output It may be. Moreover, each DB shown in FIG. 1 of FIG. 21 is synonymous.

  Further, each unit that performs the arithmetic processing includes a photovoltaic power generation determination unit 151 configured to include a DB to be used as described in FIG. 23, a used hot water amount prediction unit 152 that predicts a used hot water amount based on the past used hot water amount, and the like. A fuel cell output calculating unit 15 for calculating a set value of the fuel cell output, and a fuel cell control unit 154 for controlling the set value so as to match the actual fuel cell output may be used.

<Modification 2>
FIG. 24 is a configuration diagram of the energy management system of the present modification.

  The difference between the present embodiment and the information providing systems of the first and second embodiments is that a storage medium 171 is included.

  The storage medium 171 includes a storage unit 173 and a connection unit 172. For example, it means an external storage medium such as a flash memory such as a USB memory or a memory card. Further, it may be a storage medium such as a server connected via a network.

  The storage unit 172 includes a photovoltaic power generation determination program 151, a hot water volume prediction program 152, a fuel cell output program program 153, a fuel cell control program 154, a generated power DB 161, a hot water volume prediction DB 162, and a fuel cell output upper limit. This is a memory for storing the value DB 163 and the fuel cell control DB 164. A non-primary storage medium that cannot write data may be used, or a storage medium such as a semiconductor memory that can read and write data at any time. In addition, a display program that displays characters and symbols that can be recognized by a person on the display unit 140, a program that distributes content to the mobile terminal via the communication IF, and the like may be stored.

  In the present embodiment, each program and each table are collectively stored in the storage medium 171, but may be divided and stored in the ROM 150, the storage unit 160, and the storage medium 171. For example, the program 151 is stored in the ROM 150, and the programs 152 to 154 are stored in the storage unit 171.

  The connection unit 173 performs connection so that an electric signal can be exchanged with an external IF 170 such as a USB terminal installed in a computer such as a server.

  Note that a connection via a network may be used instead of a direct connection like a USB memory.

<Modification 3>
FIG. 25 is a configuration diagram of the energy management system of the present modification. This is an energy management system using so-called cloud computing.

  In this modification, the information providing system includes a data server 80. In the present embodiment, the control device 10 is described as if it does not include a storage unit, but it may be provided.

  The data server 80 includes a CPU 800, a RAM (RWM) 810, a communication IF 820, an input IF 830, a display IF 840, a ROM 850, and a storage unit 860. In addition, an IF (interface) for mounting an external storage device such as a USB memory may be provided.

  The ROM 850 stores programs 151 to 154. In addition, a program necessary for display on the display unit and communication may be stored. Moreover, it is not necessary to provide all of 151 to 154, and the ROMs 150 and 850 or ROMs of other computers may be stored separately.

  The storage unit 860 stores the DBs 161 to 164.

  As an operation, a program used on the network is read from the ROM by any one of the control devices 10A and 10B and executed. For example, the CPU of the control device 10B reads a program from a ROM 150 (not shown) in the control device 10A, reads necessary data from the storage unit 860, and exhibits a processing function.

  The communication network 3 is a communication line such as the Internet that can communicate data with each other. Although described as wired, a wireless connection may be used.

  In each embodiment, the combination of “greater than or equal to less than a certain value” and the combination of “greater than a certain value and less than or equal to a certain value” can be interchanged as appropriate.

  Moreover, in each described embodiment, although the solar power generation device 20 is used, this is used for private power generation such as a solar power generation device, a wind power generation device, a geothermal power generation device, a hydroelectric power generation device, a gas power generation device, and a vibration power generation device. It can replace with the electric power generating apparatus which combined one or more of the apparatuses. That is, it is possible to replace one or a plurality of photovoltaic power generation devices with a power generation device group that forms a single system separated from a commercial system.

  Each table exemplifies the value of the amount of power per hour, but is not limited to this, and may be at regular intervals such as every minute, every 20 seconds, or every second. For example, it may be performed at a long interval such as every hour at night, and at a short interval such as every 10 minutes during the day, for example.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Communication network 2 ... Electric power transmission network 10 ... Control apparatus 20 ... Solar power generation device 30 ... Commercial system 40 ... Fuel cell 50 ... Storage battery 60 ... Load 71 ... Receiving end electric power measuring device 80 ... Data center 100 ... CPU (Central Processing) Unit) (arithmetic processing unit)
DESCRIPTION OF SYMBOLS 101 ... Solar power generation determination part 102 ... Hot water amount prediction part 103 ... Fuel cell output calculation part 104 ... Fuel cell control part 110 ... RAM (RWM) (Random Access Memory) (Read Write Memory)
120… Communication IF (inter face)
121 ... Communication unit 130 ... Input IF
131 ... Input unit 140 ... Display IF
141 ... Display unit 150 ... ROM (Read Only Memory)
151 ... Solar power generation determination program 152 ... Hot water amount prediction program 153 ... Fuel cell output calculation program 154 ... Fuel cell control program 160 ... Storage unit 161 ... Photovoltaic power generation DB (data base)
162 ... Receiving end power DB
163 ... Fuel cell DB
164 ... Fuel cell control DB
165 ... Fuel cell / storage battery DB
166 ... Fuel cell / storage battery control DB
170… External IF
171 ... Storage device 172 ... Connection IF
173 ... Storage unit 800 ... CPU
810 ... RAM (RWM) (Random Access Memory) (Read Write Memory)
820 ... Communication IF (inter face)
821 ... Communication unit 830 ... Input IF
831 ... Input unit 840 ... Display IF
841 ... Display unit 850 ... ROM (Read Only Memory)
860 ... storage unit

Claims (6)

An output from the fuel cell to the electric power load in a circuit configuration in which a photovoltaic power generation device linked to the commercial power system can supply power to the power load and surplus power of the generated power is connected to the commercial power system so that the power can be sold. To the control device to control
A determination process for determining whether the generated power of the photovoltaic power generation apparatus is greater than or less than a threshold; and
When said by determination processing Ru is determined to be equal to or greater than the threshold, the output upper limit value of the fuel cell to calculate a fuel cell output setting value based on the power demand of the power load as the upper limit, is less than the threshold value by the judgment process If it is determined that, calculation processing to calculate the fuel cell output set value based on the predicted hot water usage value ,
Energy management method for implementing a control process for controlling the fuel cell based on the fuel cell output setting value that will be calculated by the calculation processing. A photovoltaic power generation device connected to a commercial system can supply power to a power load, and the surplus power of the generated power is connected to the commercial system so that the power can be sold. In an energy management program for executing control processing of output from the fuel cell to the power load,
A determination function for determining whether the generated power of the solar power generation apparatus is greater than or less than a threshold; and
The determination if that will be determined to be the threshold value or more by the function, the output upper limit value of the fuel cell to calculate a fuel cell output setting value based on the power demand of the power load as the upper limit, is less than the threshold value by the determination function A calculation function for calculating the fuel cell output set value based on the predicted hot water usage value ,
Energy management program for realizing a control function of controlling the fuel cell based on the fuel cell output setting value that will be calculated by the calculating function. An output from the fuel cell to the electric power load in a circuit configuration in which a photovoltaic power generation device linked to the commercial power system can supply power to the power load and surplus power of the generated power is connected to the commercial power system so that the power can be sold. In a control device for controlling
Determining means for determining less than or generated power is equal to or larger than a threshold of the photovoltaic device,
If that will be determined to be equal to or greater than the threshold by the determination means, wherein the output upper limit value of the fuel cell to calculate a fuel cell output setting value based on the power demand of the power load as the upper limit, is less than the threshold value by the determination unit If it is determined, calculation means for calculating the fuel cell output set value based on the predicted hot water usage value ,
Controller and control means for controlling the fuel cell based on the fuel cell output setting value that will be calculated by the calculation means. A photovoltaic power generation apparatus linked to a commercial system is capable of supplying power to the power load, and the surplus power of the generated power is connected to the commercial system so that the power can be sold. From the fuel cell and the storage battery to the power load In the control device for controlling the output of
Determining means for determining less than or generated power is equal to or larger than a threshold of the photovoltaic device,
Wherein when that will be determined to be the threshold value or more by determining means calculates the fuel output preset value of fuel cell and battery output setting value based on the power demand of the electrical load as the upper limit output upper limit value of the battery, said determining means When it is determined that the value is less than the threshold value, the calculation means for calculating the fuel cell output set value and the storage battery output set value based on the hot water usage predicted value ,
Controller and control means for controlling the fuel cell and the storage battery on the basis of the output preset value of fuel cell and battery output setting value that will be calculated by the calculation means.   A photovoltaic power generation apparatus linked to a commercial system is capable of supplying power to the power load, and the surplus power of the generated power is connected to the commercial system so that the power can be sold. From the fuel cell and the storage battery to the power load In the control device for controlling the output of
  Determining means for determining whether the generated power of the solar power generation apparatus is greater than or less than a threshold; and
  When it is determined by the determination means that the value is equal to or greater than the threshold value, the fuel cell is configured to satisfy the power demand of the power load with the output upper limit value of the fuel cell as an upper limit and to keep the amount of power received from the commercial system constant. A calculating means for calculating an output set value and a storage battery output set value, and calculating a fuel cell output set value and a storage battery output set value based on a predicted amount of hot water used when the determining means determines that the output set value is less than a threshold value; ,
  Control means for controlling the fuel cell and the storage battery based on the fuel cell output set value and the storage battery output set value calculated by the calculating means;
A control device comprising: An output from the fuel cell to the electric power load in a circuit configuration in which a photovoltaic power generation device linked to the commercial power system can supply power to the power load and surplus power of the generated power is connected to the commercial power system so that the power can be sold. In the energy management system that controls
Determining means for determining less than or generated power is equal to or larger than a threshold of the photovoltaic device,
If that will be determined to be equal to or greater than the threshold by the determination means, wherein the output upper limit value of the fuel cell to calculate a fuel cell output setting value based on the power demand of the power load as the upper limit, is less than the threshold value by the determination unit If it is determined, calculation means for calculating the fuel cell output set value based on the predicted hot water usage value ,
Energy management system and control means for controlling the fuel cell based on the fuel cell output setting value that will be calculated by the calculation means.

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