JP5948217B2 - Fuel cell operation control method and operation control system in an apartment house - Google Patents

Description

  The present invention relates to a fuel cell operation control method and the like in an apartment house capable of controlling the operation of a plurality of fuel cells so as to minimize the energy cost.

  In recent years, awareness of energy conservation has increased, and fuel cells for home use have attracted attention. In particular, in an apartment house, there is a method of installing a plurality of fuel cells in the entire apartment house.

  For example, there is a cogeneration system in which one thermoelectric supply device (a device in which a fuel cell and a hot water storage tank are in a one-to-one relationship) is provided for three apartment houses (Patent Document 1).

JP 2003-199254 A

  However, the conventional patent document 1 has a description that the number of operating thermoelectric supply devices is determined based on the power consumption state and the hot water consumption state, but the specific control flow and judgment criteria are not known. . In addition, the fuel cell can generate power, generate hot water using heat, and store the heat in the hot water storage tank. However, the timing of heat demand and the timing of electricity demand do not necessarily coincide, and if the operation of the fuel cell or the like is controlled simply according to the demand for only heat or electricity, the total energy cost may increase. is there.

  The present invention has been made in view of such problems, and an object thereof is to provide a fuel cell operation control method and the like that can minimize the total energy cost.

  In order to achieve the above-mentioned object, the first invention provides a plurality of fuel cells, a plurality of hot water storage tanks for storing hot water generated using waste heat of the fuel cells, and the operation of the fuel cells. A hot water storage tank is allocated to a small group of a plurality of units, and the control unit is configured to predict each small group based on heat utilization prediction for each small group. The initial operation plan of the plurality of fuel cells for each unit is made, and the initial cost is calculated from the total power receiving cost, fuel cost, and fuel cell operation cost of the collective housing at this time, and the entire predetermined time of the collective housing For the target time when the shortage of the planned power generation amount for each predicted electricity usage is maximum and exceeds the predetermined amount, the operation plan of the fuel cell that is scheduled to start or stop at the time closest to the target time is changed. Then, the operation plan of the fuel cell is corrected so as to increase the number of the fuel cells operating at the target time, and the total power receiving cost, fuel cost, and operation of the fuel cell of the collective housing in the corrected operation plan A fuel cell operation control method in an apartment house, wherein a correction cost is calculated from a cost, the operation of the fuel cell is controlled by an operation plan with the lowest cost by comparing the initial cost and the correction cost. is there.

  By doing in this way, first, since the operation plan of a plurality of fuel cells is created based on the necessary heat demand for each small group, the necessary amount of heat can be secured at the necessary timing. In addition, the fuel cell with respect to the time when the total power generation scheduled amount is insufficient by a predetermined amount or more with respect to the total expected electricity usage amount (that is, the time period in which the amount of power for purchasing electricity from the power company is a predetermined amount or more). Since the number of operation of the fuel cell is controlled so as to increase the number of operations, the electricity charge can be reduced. At this time, since the operation plan of the fuel cell scheduled to start or stop at the time closest to the target time is changed, the influence on the heat demand can be minimized.

  In addition, by arranging one hot water storage tank for a small group of apartment houses, it is possible to reduce the influence of variation in heat demand as compared to the case where a hot water storage tank is arranged for each individual unit. Moreover, compared with the case where a big hot water storage tank is installed with respect to the whole housing complex, since piping length can be shortened, piping loss can be made small.

  In addition, when a collective power reception contract is made for the entire apartment house, it is important to reduce the contract power in order to reduce the electricity bill. At this time, compared to the method of generating fuel cells according to the electric power used for each unit, the method of supplying multiple generated power to the entire apartment is less affected by fluctuations in power demand, and the fuel The operating rate of the battery can be improved.

  Further, in the present invention, the correction is repeated until the shortage of the planned power generation amount with respect to the predicted electricity usage amount for every predetermined time becomes equal to or less than the predetermined amount at all times, and the initial cost and the respective operation plans after the correction are It is desirable to compare the respective correction costs and control the operation of the fuel cell with an operation plan with the lowest cost.

  By doing in this way, operation of a fuel cell can be controlled so that contract electric power (basic charge) may not be exceeded, for example, and total energy cost can be minimized.

  Further, in the present invention, when correcting the operation plan of the fuel cell, the first condition that the fuel cell continuously operates once a day, and the number of operation of the fuel cell is increased during the target time. In doing so, the number of operating the fuel cell at another time is reduced, and the second condition in which the shortage of the scheduled power generation amount with respect to the expected electricity usage amount at the other time at this time does not exceed the predetermined amount. It is desirable to revise the operation plan to satisfy it.

  By doing in this way, durability of a fuel cell is ensured and a fuel cell can be operated efficiently. In addition, when changing the operating conditions of the fuel cell, the operation of the fuel cell can be controlled so as not to exceed the contract power (basic charge).

  Further, in the present invention, after the initial operation plan is established, the fuel cell of the time when the power generation amount is excessive is further prevented so that an excessive amount of the power generation scheduled amount with respect to the expected electricity usage amount every predetermined time does not occur. It is desirable to reduce the number of operations and correct the operation plan for the target time.

  By doing in this way, the reverse power flow of the generated electric power can be prevented.

In the present invention, the battery further comprises a storage battery, and the correction cost in the case of reducing the expected purchase power amount by the discharge by the storage battery with respect to the target time, and the correction cost by correcting the operation plan of the fuel cell, It is desirable to select a method with low cost.

  By doing in this way, for example, it is possible to store electric power at night and use it in a time zone where there is a great demand for electricity in the daytime.

  A second invention includes a plurality of fuel cells, a plurality of hot water storage tanks for storing hot water generated using waste heat of the fuel cells, and a control unit for controlling the operation of the fuel cells. One hot water tank is connected to a plurality of the fuel cells, and in the housing complex, the hot water tank is assigned to one small group of a plurality of units, and the control unit is provided for each small group. An initial operation plan drafting means for making an initial operation plan of the fuel cell for each of the small groups from heat utilization prediction, and the total power receiving cost, fuel cost, and fuel cell operation cost of the apartment house in the initial operation plan An initial cost calculating means for calculating an initial cost from a target time for which a shortage of a planned power generation amount relative to an expected electricity usage amount for every predetermined time of the entire apartment building is a maximum and a predetermined amount or more. An operation plan correcting means for correcting an operation plan of the fuel cell so as to increase the number of fuel cells operating at the target time by changing the operation plan of the fuel cell that is scheduled to be operated or stopped at a time closest to the time; In a later operation plan, there is a correction cost calculation means for calculating a correction cost from the total power receiving cost, fuel cost, and fuel cell operation cost of the collective housing, and there is a shortage of the planned power generation amount with respect to the expected electricity usage every predetermined time The operation plan determining means for repeating the above correction until the amount is equal to or less than a predetermined amount, comparing the corrected costs in the initial cost and the corrected operation plan, and determining the operation plan with the lowest cost, and the operation plan Fuel cell operation control means for controlling the operation of the fuel cell in accordance with the operation plan determined by the determination means. It is an operation control system of the fuel cell in the case housing.

  By doing in this way, a fuel cell can be controlled by operating conditions with the lowest cost in consideration of heat demand and electricity demand.

  ADVANTAGE OF THE INVENTION According to this invention, the operation control method of a fuel cell etc. which can minimize a total energy cost can be provided.

The figure which shows the structure of the operation control system 1 of a fuel cell. The flowchart which shows the control method of the operation control system 1 of a fuel cell. The figure which shows an example of the heat demand of small group 11a-11e. The figure which shows an example of the electric power generation plan of the fuel cell of small group 11a-11e. (A) is a figure which shows an example of the electric power generation plan amount of the whole apartment house, and an estimated electricity usage amount, (b) is a figure which shows the estimated purchase electric energy which is the difference of an electricity usage amount and electric power generation scheduled amount. (A) is a figure which shows an example of the electric power generation scheduled amount of the whole apartment house after correction | amendment, and an example of an estimated electricity usage amount, (b) is the estimated purchased electric energy which is the difference of the electric power consumption amount after correction | amendment and an electric power generation scheduled amount. FIG. The figure which shows an example of the electric power generation schedule of the fuel cell of the small groups 11a-11e after correction | amendment. (A) is a diagram showing an example of the final planned power generation amount and expected electricity usage for the entire apartment complex, and (b) is the estimated purchased power amount, which is the difference between the final predicted electricity usage amount and the planned power generation amount. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a fuel cell operation control system 1. The fuel cell operation control system 1 is applied to an apartment house 9 and includes a control unit 3, a fuel cell 5, a hot water tank 7, and the like.

  A plurality of fuel cells 5 are connected to the apartment house 9. The fuel cell 5 can generate electric power using, for example, gas fuel. The generated electric power is used for the housing complex 9. The control unit 3 controls the operation of each fuel cell 5. The control unit 3 is, for example, a computer, and includes a storage unit that stores various data and a calculation unit such as a CPU that performs calculation. In addition, the control unit 3 includes a data input unit that acquires various data in each home and a signal output unit that outputs a control signal to the fuel cell 5.

  One hot water tank 7 is connected to a plurality of fuel cells 5. The heat recovered by the fuel cell 5 becomes hot water and is stored in the hot water tank 7. The hot water stored in this way can be used by each consumer (each household).

  The apartment house 9 is divided into small groups 11a to 11e by a plurality of relatively close units such as the same floor. In the example shown in the figure, the small groups 11a to 11e are divided by four dwelling units on the same floor. One hot water tank 7 is connected to each of the small groups 11a to 11e. Hot water is stored in the hot water tank 7. That is, one hot water tank 7 corresponds to the heat demand of a plurality of dwelling units.

  In addition, when the electrical demand in the housing complex 9 exceeds the amount of power generated by the fuel cell 5, power is supplied to the housing complex 9 from the AC distribution line 13 from the power company. Further, power necessary for operation of the fuel cell 5 is also supplied from the AC distribution line 13.

  Here, as in the present invention, in the case of collective power reception in the apartment house 9, it is an important means for suppressing the electricity charge (basic charge) to reduce the contract power. That is, it is desirable to suppress the maximum amount of electricity used for 30 minutes to a predetermined amount or less. Therefore, it is advantageous in terms of cost to generate power for a plurality of fuel cells in a time zone in which each household has a high power demand, and to stop in a time zone in which the demand for power generation is low.

  On the other hand, the temperature of the hot water stored in the hot water tank 7 decreases with time. Further, when the hot water tank 7 is full, hot water cannot be made any more. In this state, even if power generation is performed, the heat at that time cannot be used effectively.

  In addition, when there is a demand for heat in a state where hot water is not sufficiently stored in the hot water tank 7, it is necessary to make hot water with a backup water heater or the like for the insufficient amount of heat. Therefore, energy consumption increases and the heat generated at the time of power generation is not effectively used. Therefore, it is desirable to store hot water in the hot water tank 7 in accordance with the demand for hot water in each household (each small group) (referred to as heat demand in the present invention).

  In order to operate the fuel cell 5 and to store the waste heat in the hot water storage tank 7 as much as necessary, several hours to several tens of hours after starting the fuel cell 5 are required. Therefore, it is necessary to control the operation of the fuel cell 5 so that the total energy cost is minimized in consideration of both heat demand and electricity demand.

  Next, functions of the fuel cell operation control system 1 will be described. FIG. 2 is a diagram showing a process of controlling the operation of the fuel cell 5 by the fuel cell operation control system 1. First, the control part 3 makes the initial operation plan of the fuel cell for every small group 11a-11e from the heat utilization prediction of each small group 11a-11e (step 101). The heat utilization prediction of each of the small groups 11a to 11e is stored in the storage unit, and is predicted based on, for example, a predetermined period (temperature, season, day of the week, etc.) in the past predetermined period.

  FIG. 3 is a diagram illustrating an example of heat utilization prediction of each of the small groups 11a to 11e. The vertical axis represents heat demand, and the horizontal axis represents time. Usually, the heat demand is the largest for bath time. Therefore, in the present invention, in the small groups 11a to 11e, it is predicted that the bath will be used at the earliest time when the peak of the predetermined amount or more of the heat demand first comes (that is, among the dwelling units constituting the small group). (Time), assuming that there is a total heat demand for the entire small group for one day, the heat utilization of each of the small groups 11a to 11e is predicted. For example, in the small group 11e, it is assumed that the heat demand for the entire day of the small group 11e is at 17:00.

  As described above, in order to store a necessary amount of heat (amount of hot water) for heat utilization prediction, it is necessary to start the fuel cell 5 several hours to ten and several hours before that. As shown in the figure, it is necessary to start the fuel cells at times A to E in order to cope with the heat utilization predictions of the small groups 11a to 11e, respectively.

  FIG. 4 is a diagram showing the operating state of the fuel cell 5, that is, the planned power generation amount, set as described above. In addition, in each small group 11a-11e, it describes in 2 steps | paragraphs in this embodiment, since the two fuel cells 5 are connected to each hot water storage tank 7 (FIG. 1). ). Since the fuel cell 5 always operates at the maximum output (rated output), the power generation amount is proportional to the number of operations of the fuel cell 5.

  Next, the control unit 3 calculates a scheduled power generation amount and an estimated electricity usage amount. FIG. 5A is a diagram showing a scheduled power generation amount (hatched portion) by the fuel cell 5 and an expected electricity usage amount (F line in the figure) for each hour. The scheduled power generation amount is obtained by adding the scheduled power generation amounts of the small groups 11a to 11e shown in FIG. 4 for each hour, and 11a to 11e in the drawing correspond to the power generation amounts of the small groups 11a to 11e. The predicted electricity usage is stored in the storage unit, and is predicted based on predetermined conditions (such as temperature, season, day of the week, etc.) for a predetermined period in the past, for example.

  Next, the control unit 3 subtracts the scheduled power generation amount from the expected electricity usage amount. That is, the amount of power purchased from the power company for each hour is calculated for the entire apartment house 9. For example, at 21:00, G in the figure is the expected purchase power amount for purchasing power from the power company.

  FIG.5 (b) is a figure which shows the estimated purchase electric energy in every time. The controller 3 calculates an initial cost from the power reception cost, fuel cost, and fuel cell operating cost in this state (step 102). In other words, the control unit 3 calculates the total energy cost from the operating conditions of the fuel cell 5 and the estimated purchased power amount.

  Here, for the power receiving cost, an hourly electricity bill, contract power, and the like are considered. The contracted power usually requires a higher power charge when the power consumption every 30 minutes (one hour equivalent) exceeds the contracted power. Therefore, the power reception cost varies greatly depending on whether or not the power consumption every 30 minutes (one hour equivalent) exceeds the contract power. The fuel cost is the cost of fuel required for operating the fuel cell, fuel consumed by a backup water heater, and the like. Further, the operating cost of the fuel cell is a cost such as electric power necessary for operating the fuel cell.

  Next, the control unit 3 compares the predicted electricity usage amount with the scheduled power generation amount of the fuel cell 5 according to the initial operation plan for each hour. In addition, the control unit 3 specifies a target time in which the shortage of the scheduled power generation amount with respect to the predicted electricity usage amount every predetermined time is the maximum and the predetermined amount or more. Further, the control unit 3 changes the operation plan of the fuel cell 5 scheduled to start or stop at the time closest to the target time, and increases the number of fuel cells operating at the target time. Is corrected (step 103).

  In the example shown in FIG. 5B, for example, when the contract power is H, the contract power is exceeded, and the difference between the power usage amount and the planned power generation amount (expected purchase power amount) is the largest. It's time. Here, as shown in FIG. 4, the fuel cells scheduled to start or stop at the closest time to 21:00 are the fuel cells of the small group 11c. In the illustrated example, the fuel cells 5 of the small group 11c are scheduled to be stopped at 20:00.

  Therefore, the control unit 3 corrects the operation schedule of the fuel cells 5 of the small group 11c. In this embodiment, as shown in FIG. 6 (a), one fuel cell 5 scheduled to stop operation at 20:00 is extended to 21:00. That is, the number of fuel cells 5 operating at 21:00 is increased by one. At this time, the activation of the fuel cell 5 is delayed by 1 hour. Therefore, the fuel cell 5 that was scheduled to operate from 15:00 to 20:00 is corrected from 16:00 to 21:00. That is, the operating portion of the fuel cell 5 at 15:00 is moved to 21:00 (arrow I in the figure).

  As described above, the total amount of heat generated from the fuel cell 5 does not change by changing only the operation start timing without changing the operation time of the fuel cell 5. Therefore, although the timing for storing the target amount of heat in the hot water storage tank 7 is slightly different from the heat demand, it can also be applied to the heat demand.

  FIG. 6B is a diagram showing the estimated purchased electric energy after the correction as described above. As shown in the figure, the shortage at 21:00 decreases slightly and the shortage at 15:00 increases (in the direction of arrow J in the figure).

  Next, the control unit 3 calculates a correction cost for the operation of the corrected fuel cell 5 from the power receiving cost, the fuel cost, and the operation cost of the fuel cell (step 104). The control unit 3 stores the operation plan in this state and the correction cost in the storage unit.

  The control unit 3 repeats the above correction until there is no estimated purchased power amount exceeding the contract power (step 105). FIG. 7 is a diagram showing a state in which the correction of operation of each fuel cell 5 is repeated. FIG. 8A is a diagram showing the power generation scheduled amount and the expected electricity usage amount for each hour after such correction, and FIG. 8B is a diagram showing the expected purchased power amount.

  As described above, when the contract power is less than the total time, the control unit 3 ends the calculation of the correction cost for each correction condition. Further, the control unit 3 compares the initial cost and each correction cost, extracts an operation plan with the lowest cost, and controls the fuel cell 5 (step 106). In addition, since the cost is usually the lowest under conditions that do not exceed the contract power, the final cost is the lowest. However, in the present invention, it is not always necessary to repeat the calculation until all of the expected purchased electric energy falls below the contract power, and the above correction may be repeated even after the contract power is reduced.

  In the present invention, it is desirable to consider the following points in the correction. First, when the operating number of the fuel cell 5 is increased (for example, 21:00 in FIG. 6 (a)) with respect to the target time with the largest expected purchased electric energy, the time when the operating number of the fuel cell 5 is decreased (for example, FIG. 6). When the expected purchased power amount at 15:00 in (a) exceeds the contract power, the operation of the other fuel cell 5 is changed. That is, instead of the fuel cell 5 scheduled to start or stop at the time closest to the target time, the operation plan of the fuel cell close to the second, third,... Is changed. In this way, by reducing the number of operating fuel cells 5 at a certain time, if the expected purchased power amount at that time exceeds the contract power, the number of operating fuel cells 5 is not decreased from that time. The operating time of the fuel cell 5 that starts or stops the operation at the time is changed.

  The fuel cell 5 is operated only once a day. The fuel cell 5 cannot generate power immediately after startup, and it takes time to generate power stably. Therefore, it is inefficient to repeat starting and stopping a plurality of times a day. Further, from the viewpoint of durability of the fuel cell 5, it is not desirable to repeatedly start and stop in a short time. Accordingly, each fuel cell 5 is assumed to be operated continuously from start to stop once a day.

  In addition, in the system, when it is necessary to prevent reverse power flow, the operation of the fuel cell 5 is performed so that the expected purchased power amount does not become negative (that is, the power generation amount is larger than the purchased power amount). It is necessary to correct. That is, the number of operation of the fuel cell 5 at the target time when the expected purchased electric energy is negative is reduced. Note that the operating time is shifted to a time when the expected purchase electric energy is larger, as the operating time of the fuel cell is reduced.

  In addition, this invention can also be combined with a storage battery. In order to combine with a storage battery, for example, inexpensive power may be stored in the storage battery at night and discharged at the time when the most anticipated purchased power amount is large in the daytime. In this case, the total energy cost is calculated by taking into account the cost of power storage and discharge to the storage battery. Furthermore, it can be combined with photovoltaic power generation. In this case, the amount of power generated by solar power generation is predicted in consideration of the weather on the next day, and the operation of the fuel cell 5 may be planned in consideration of this.

  As described above, according to the present invention, in consideration of both heat demand and electricity demand, the operation of the fuel cell 5 is planned so as to minimize the total energy cost. it can. In particular, since the heat demand in a small group is set at a certain time and heat is stored in the hot water tank 7 toward this time, the effect of an increase in energy cost due to insufficient heat and a decrease in temperature due to the hot water tank 7 is reduced. Can do.

  Moreover, since one hot water tank 7 covers a plurality of dwelling units, it is possible to average the variation of each dwelling unit. Therefore, the influence of variation in heat demand can be suppressed. On the other hand, the power generation by the fuel cell 5 corresponds to the electric demand of the entire apartment house 9. Therefore, the operation plan of the fuel cell 5 can be made appropriately with respect to the power generation amount of the entire housing complex 9.

  In addition, the electricity charge (basic charge) can be reduced by repeating the correction so that the expected power consumption does not exceed the predetermined power (contract power) with respect to the initial operation plan of the fuel cell 5 that is planned only by heat demand. be able to. Moreover, it is possible to obtain an operation plan with the lowest total energy cost by repeating the correction and comparing the correction costs for each correction condition.

  Further, in the correction, the fuel cell is operated once a day as the operating condition of the fuel cell, so that the power generation efficiency of the fuel cell is excellent and the durability of the fuel cell is not adversely affected. In addition, when the number of operating fuel cells 5 is reduced, if the expected purchased power amount at the time when the operation is reduced is equal to or greater than a predetermined power (contract power), the number of operating fuel cells at the time is not reduced. Thus, it is possible to reliably obtain an operation plan with the lowest total energy cost.

  In addition, it is possible to prevent a reverse power flow by making an operation plan of the fuel cell 5 so as not to cause an excess of the scheduled power generation amount with respect to the predicted purchased power amount every predetermined time. In combination with a storage battery, cheap electric power at night can be used in the daytime.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, the number of houses constituting the small groups 11a to 11e is not limited to the example described above. Further, the number of fuel cells 5 connected to one hot water tank 7 and the total number of fuel cells 5 are not limited to the above-described example.

DESCRIPTION OF SYMBOLS 1 ......... Fuel cell operation control system 3 ... Control unit 5 ... Fuel cell 7 ... Hot water tank 9 ... Housing complex 11a-11e ... Small group 13 ... AC distribution line

Claims (6)

Multiple fuel cells;
A plurality of hot water storage tanks for storing hot water generated using waste heat of the fuel cell;
A control unit for controlling the operation of the fuel cell;
Comprising
In an apartment house, the hot water tank is assigned to one small group of multiple units,
The controller is
Based on the heat utilization prediction for each of the small groups, an initial operation plan for the plurality of fuel cells for each of the small groups is made, and the total power receiving cost, fuel cost, and fuel cell operating cost of the collective housing at this time Calculate the initial cost from
The fuel cell that is scheduled to start or stop at a time closest to the target time with respect to a target time in which the shortage of the planned power generation amount with respect to the expected electricity usage of the entire apartment for every predetermined time is the maximum and the predetermined amount or more The operation plan of the fuel cell is corrected so as to increase the number of the fuel cells operating at the target time, and the power receiving cost and the fuel cost of the entire apartment house in the corrected operation plan are corrected. And the correction cost is calculated from the operating cost of the fuel cell,
A method for controlling the operation of a fuel cell in an apartment house, wherein the initial cost and the correction cost are compared and the operation of the fuel cell is controlled by an operation plan with a low cost. At all times, the above correction is repeated until the shortage of the planned power generation amount with respect to the expected electricity usage every predetermined time is equal to or less than the predetermined amount, and the initial cost and the correction cost in each corrected operation plan are calculated. 2. The operation control method for a fuel cell in an apartment house according to claim 1, wherein the operation of the fuel cell is controlled by an operation plan with the lowest cost. When correcting the operation plan of the fuel cell,
A first condition in which the fuel cell continuously operates once a day;
In increasing the number of operation of the fuel cell at the target time, the number of operation of the fuel cell at another time is decreased, and the shortage of the planned power generation amount with respect to the expected electricity usage amount at the other time at this time is The operation control method for a fuel cell in an apartment house according to claim 1 or 2, wherein the operation plan is corrected so as to satisfy both of the second conditions not exceeding the fixed amount. After making the initial operation plan, in order not to generate an excessive amount of power generation scheduled with respect to the expected electricity usage every predetermined time, further reduce the number of operation of the fuel cell during the time when the power generation amount is excessive, The operation control method for a fuel cell in an apartment house according to any one of claims 1 to 3, wherein the operation plan is corrected with respect to the target time. It also has a storage battery,
Comparing the correction cost in the case of reducing the estimated purchased power amount by discharging by the storage battery with respect to the target time and the correction cost by correcting the operation plan of the fuel cell, a method with a low cost is selected. The operation control method of a fuel cell in an apartment house according to any one of claims 1 to 4, wherein the operation is controlled. Multiple fuel cells;
A plurality of hot water storage tanks for storing hot water generated using waste heat of the fuel cell;
A control unit for controlling the operation of the fuel cell;
Comprising
One hot water tank is connected to a plurality of the fuel cells,
In an apartment house, the hot water tank is assigned to one small group of multiple units,
The controller is
From the heat utilization prediction for each of the small groups, an initial operation plan drafting means for making an initial operation plan of the fuel cell for each of the small groups;
An initial cost calculating means for calculating an initial cost from the total power receiving cost, fuel cost, and fuel cell operating cost of the apartment house in the initial operation plan;
The fuel cell that is scheduled to be operated or stopped at a time closest to the target time with respect to a target time that has a shortage of a planned power generation amount with respect to an expected amount of electricity used every predetermined time of the entire apartment house and is greater than or equal to a predetermined amount. An operation plan correction means for correcting the operation plan of the fuel cell so as to change the operation plan and increase the number of fuel cells operating at the target time;
A correction cost calculation means for calculating a correction cost from the total power receiving cost, fuel cost, and fuel cell operation cost of the collective housing in the corrected operation plan;
The above correction is repeated until the shortage of the planned power generation amount with respect to the expected electricity usage every predetermined time is less than or equal to the predetermined amount, and the initial cost and the corrected cost in each corrected operation plan are compared, and the most cost An operation plan determination means for determining an operation plan with a low
Fuel cell operation control means for controlling the operation of the fuel cell in the operation plan determined by the operation plan determination means;
An operation control system for a fuel cell in an apartment house, comprising:

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