JP2019071169A - Fuel cell control system, fuel cell control method and fuel cell system - Google Patents

Abstract

To provide a technique for controlling a fuel cell system by using the information about system power supply stop.SOLUTION: In a fuel cell control system 100 including at least one fuel cell system 30 having a fuel cell and an operation control section, and a management device 20 connected communicably with the fuel cell system 30 via a network 40, and acquiring power failure information, including the system stop starting time for starting supply stop of system power and the system resumption time for resuming supply stop of system power, for system power supply stop from the system power supply, via the network, the management device 20 or an operation control section 33 controls so that the fuel cell system 30 executes autonomous operation at least the system stop start time in a state parallel off from the system power supply, and executes autonomous operation preparation control, i.e., preparation for autonomous operation, for the fuel cell system 30 before execution of autonomous operation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel cell control system, a fuel cell control method, and a fuel cell system.

Patent Document 1 discloses a management system that predicts an optimal operation pattern of a fuel cell system such that the utility cost consumed by the user is the lowest. The management system of Patent Document 1 includes a user information database for storing a user's family configuration, family schedule, electric power capacity of electric products, capacity of storage tank, etc., and light thermal energy for storing unit price of electricity charges and gas charges and their fluctuations. It has a cost database and a weather information database for storing weather information. The management system uses the information stored in the user information database, the light energy cost database and the weather information database to predict the optimal operation pattern in which the light energy cost consumed is the lowest.
This makes it possible to effectively reduce the cost of electricity and CO ₂ emissions.

JP, 2005-160238, A

  However, Patent Document 1 predicts the optimum operation pattern of the fuel cell system in which the light and heat consumption cost is the lowest, based on various information stored in the user information database, the light and heat cost database and the weather information database. There is no disclosure of a technology for controlling a fuel cell system using information such as a power failure, in which grid power is stopped.

  Then, an object of this invention is to provide the technique which controls a fuel cell system using the information regarding stop of supply of system | strain electric power.

The characteristic configuration of the fuel cell control system according to the present invention is
At least one fuel cell system having a fuel cell that receives supply of fuel and generates electric power, and an operation control unit;
The fuel cell system is communicably connected to the fuel cell system via a network, and with respect to the supply stop of the system power from the system power supply, the system stop start time at which the supply stop of the system power is started and the supply of the system power are resumed. A management device that acquires power failure information including system restart time via the network;
In a fuel cell control system comprising
The management device or the operation control unit controls the fuel cell system to execute a stand-alone operation at least at the grid stop start time in a state where the fuel cell system is disconnected from the grid power supply, and before the stand-alone operation is performed. The present invention is characterized in that self-standing operation preparation control, which is preparation for the self-standing operation, is performed on the fuel cell system.

  According to the above feature configuration, in the fuel cell control system, the management device and the fuel cell system are connected via the network. The management apparatus acquires power failure information including the system stop start time and the system restart time via the network for the supply stop of the system power. Then, the control device or the operation control unit controls the fuel cell system to execute the autonomous operation at the system stop start time, and performs the autonomous operation preparation control before the execution of the autonomous operation. Therefore, control of execution of the self-sustaining operation and self-sustaining operation preparation control can be executed using power failure information acquired from the outside of the fuel cell system via the network.

  Also, the management device or the operation control unit starts the self-sustaining operation preparation control before the fuel cell system executes the self-sustaining operation at the system stop start time. Therefore, the fuel cell system is executed after the self-sustaining operation preparation control, such as securing a longer period of the self-sustaining operation in the grid stop period by executing the self-sustaining operation preparation control Promote self-sustaining driving. The grid stop period is a period between the grid stop start time and the grid restart time.

Further features of the fuel cell control system according to the present invention are:
The fuel cell system further includes a microcomputer meter for measuring the amount of supplied fuel.
The management device or the operation control unit stops the operation of the fuel cell and detects the supply of the fuel to the fuel cell in order to detect the leakage of the fuel by the microcomputer meter in the independent operation preparation control. The fuel supply stop period is changed to a period other than the grid stop period when the fuel supply stop period to be stopped overlaps with the grid stop period which is a period between the grid stop start time and the grid restart time. The point is to

  If the fuel cell is stopped to stop the fuel supply to the fuel cell in order to detect the fuel leakage with the microcomputer meter, the fuel cell can not generate power. Therefore, according to the above-described characteristic configuration, the fuel supply stop period is changed to a period other than the system stop period, and the fuel supply is continued during the system stop period. As a result, the fuel cell system can generate electric power by self-sustaining operation without being affected by the fuel supply stop period during the system stop period. That is, it is possible to secure a longer self-sustaining operation period without being affected by the fuel supply stop period.

Further features of the fuel cell control system according to the present invention are:
The fuel cell system further includes a reforming water tank for storing reforming water to be supplied to the fuel cell,
The management device or the operation control unit is controlled to increase the reforming water of the reforming water tank in the autonomous operation preparation control.

  The reforming water of the reforming water tank is used to perform steam reforming of the fuel supplied to the fuel cell. According to the above-described feature configuration, the operation control unit performs control to increase the amount of reforming water in the reforming water tank in advance in the stand-alone operation preparation control started before the system shutdown start time. As a result, during the system shutdown period, the fuel cell system can perform power generation by self-sustaining operation using the increased reforming water. Further, by increasing the amount of reforming water in advance, it is possible to secure a longer period of the self-sustaining operation of the fuel cell system as compared with the case of not increasing it.

Further features of the fuel cell control system according to the present invention are:
The fuel cell system further includes a hot water storage tank for storing hot and cold water using heat of combustion exhaust gas discharged from the fuel cell,
The said management apparatus or the said operation control part exists in the point which discharges the hot / cold water in the said hot water storage tank in the said independent operation preparation control.

  According to the above feature configuration, the temperature of the fluid in the hot water storage tank is lowered by discharging the hot and cold water in the hot water storage tank in the stand-alone operation preparation control. As a result, heat exchange by the heat exchanger between the fluid whose temperature is reduced from the hot water storage tank and the heat from the combustion exhaust gas is promoted, and the temperature of the fluid is raised to be easily stored in the hot water storage tank as hot water. Thus, by promoting heat exchange between the heat exchanger and the fluid whose temperature of the hot water storage tank is lowered, the operation of the fuel cell system becomes smooth, and the self-sustaining operation can be promoted. In addition, since the temperature of the fluid in the hot water storage tank is lowered, the condensation of the water in the combustion exhaust gas from the fuel cell can be promoted, and the reforming water used for the self-sustaining operation can be recovered from the combustion exhaust gas. This can also promote the self-sustaining operation of the fuel cell system.

Further features of the fuel cell control system according to the present invention are:
The management device or the operation control unit controls the fuel cell system according to a learning operation in which the operation state of the fuel cell is learned and the generated power generated by the fuel cell is controlled based on the learning.
The said management apparatus or the said operation control part is in the point which cancels | releases the said output suppression control in the said self sustaining operation preparation control, when performing output suppression control so that the generated electric power of the said fuel cell may be suppressed in the said learning operation. .

  When the fuel cell system is controlled by the learning operation, the power generated by the fuel cell may be suppressed because the power demand is small. In a state where the fuel cell system is disconnected from the system power supply, if the power generation by the fuel cell is suppressed, there is a possibility that the power demand can not be met. Therefore, according to the above-described characteristic configuration, the operation control unit cancels the output suppression control for suppressing the generated power in the autonomous driving preparation control. Thus, the fuel cell can perform independent power generation corresponding to the power demand.

The characteristic configuration of the fuel cell control method according to the present invention is
At least one fuel cell system having a fuel cell that receives supply of fuel and generates electric power, and an operation control unit;
The fuel cell system is communicably connected to the fuel cell system via a network, and with respect to the supply stop of the system power from the system power supply, the system stop start time at which the supply stop of the system power is started and the supply of the system power are resumed. A management device that acquires power failure information including system restart time via the network;
In a fuel cell control system comprising a fuel cell control system comprising:
The management device or the operation control unit controls the fuel cell system to execute a stand-alone operation at least at the grid stop start time in a state where the fuel cell system is disconnected from the grid power supply, and before the stand-alone operation is performed. The present invention is characterized in that self-standing operation preparation control, which is preparation for the self-standing operation, is performed on the fuel cell system.

  According to the above-mentioned characteristic configuration, by executing the self-sustaining operation preparation control, the period of the self-sustaining operation is secured longer in the grid stop period, the generated power in the self-sustaining operation is further improved, etc. The self-sustaining operation of the fuel cell system can be promoted.

Further features of the fuel cell control method according to the present invention are:
The independent operation preparation control is
In the self-sustaining operation preparation control, a fuel supply stop period in which the operation of the fuel cell is stopped and the supply of the fuel to the fuel cell is stopped in order to detect the leakage of the fuel by a microcomputer meter; Changing the fuel supply stop period to a period other than the system stop period when the system stop period which is a period between the stop start time and the system restart time overlaps;
Controlling to increase the reforming water of the reforming water tank for storing the reforming water to be supplied to the fuel cell;
Draining hot and cold water in a hot water storage tank for storing hot and cold water using heat of combustion exhaust gas discharged from the fuel cell;
In the learning operation for controlling the generated power generated by the fuel cell based on the learning of the operating condition of the fuel cell, the output suppression is performed when the output suppression control is performed so that the generated power of the fuel cell is suppressed Releasing the control;
In that it comprises at least one step.

  According to the above-mentioned characteristic configuration, by performing the self-sustaining operation preparation control, it is possible to promote the self-sustaining operation of the fuel cell system during the system outage period. Since it takes time to condense the water in the combustion exhaust gas discharged from the fuel cell and increase the amount of reforming water, the step of controlling the amount of reforming water to be increased is one of the quickest steps in the stand-alone operation preparation control. It is preferable to carry out in stages. Further, the step of draining the hot and cold water in the hot water storage tank is preferably performed immediately before the system shutdown period since hot and cold water is stored in the hot water storage tank while operating the fuel cell even if the hot and cold water is discharged. Further, the step of canceling the output suppression by the learning operation is preferably performed immediately before the system shutdown period since it is preferable to operate the fuel cell system efficiently by the learning operation until the system shutdown period.

The characteristic configuration of the fuel cell system according to the present invention is
An information collecting apparatus and a network holding power failure information including a system stop start time at which the supply stop of the system power is started and a system restart time at which the supply of the system power is resumed regarding the supply stop of the system power from the system power supply A fuel cell system communicably connected to each other and having a fuel cell that receives supply of fuel and generates electric power, and an operation control unit,
The operation control unit
Acquiring the power failure information from the information collecting apparatus via the network;
The fuel cell system is controlled so as to execute a self-sustaining operation at least at the system stop start time in a state where the fuel cell system is disconnected from the system power, and is a preparation for the self-sustaining operation before the self-sustaining operation The point is to execute the stand-alone operation preparation control.

  According to the above-mentioned characteristic configuration, by executing the self-sustaining operation preparation control, the period of the self-sustaining operation is secured longer in the grid stop period, the generated power in the self-sustaining operation is further improved, etc. The self-sustaining operation of the fuel cell system can be promoted.

It is a block diagram of a fuel cell control system. It is an example of blackout information. It is a block diagram at the time of arrange | positioning a fuel cell system to each household as a distributed power supply. It is a block diagram of a fuel cell system. It is a corresponding | compatible figure which shows the correspondence of an area | region and the fuel cell system currently arrange | positioned. It is a flowchart which shows an example of the whole flow of stand-alone driving | operation preparatory control. It is a flow chart which shows an example of the flow of stop adjustment processing. It is a flow chart which shows an example of the flow of modification water increase processing. It is a flowchart which shows an example of the flow of a discharge hot water process. It is a flow chart which shows an example of the flow of output control cancellation processing.

[Embodiment]
An embodiment of a fuel cell control system according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a fuel cell control system.

(1) Overall Configuration of Fuel Cell System The fuel cell control system 100 includes an information collection site 10, a management device 20, and a plurality of fuel cell systems 30 (30a, 30b, 30c,...) Via a network 40. Are connected and configured. The network 40 is a communication network capable of communicating data between devices, and may be, for example, a WAN (Wide Area Network) or the like, but the form thereof may be wireless or wired.
In the fuel cell control system 100 according to the present invention, the area where the management device 20 stops supplying the system power from the commercial power system 35 (system power supply), and the system stop start time when the supply stop of the system power starts. And the power failure information including the system restart time at which the supply of the system power is restarted is acquired from the information collection site 10 via the network 40. The plurality of fuel cell systems 30 are controlled based on the power failure information. Thus, the fuel cell system 30 can be controlled using power failure information acquired from the outside of the fuel cell system 30. Each part will be described below.

(2) Configuration of Each Part (2-1) Information Collection Site The information collection site (information collection apparatus) 10 includes an information collection unit 11 and a storage unit 13.
The information collecting unit 11 collects, for example, blackout information on stoppages of supply of grid power from engines in various places. For example, the information collection unit 11 acquires planned outages from an organization such as an electric power company that manages outages, and blackout information due to electrical work from an electric construction company. As described above, the power failure information includes, for example, a region where supply of system power is stopped, a system stop start time when supply of system power is started, and a system restart time when supply of system power is resumed. included.
Then, the information collection unit 11 outputs the power failure information acquired as described above to the storage unit 13, and the storage unit 13 stores the power failure information.

Next, an example of the information stored in the storage unit 13 will be described. FIG. 2 is an example of the power failure information.
According to FIG. 2, the storage unit 13 stores, for example, the system stop start time and the system restart time for each area. For example, in the area A, the grid stop start time is 0 o'clock in 2017.2.1, and the grid restart time is 6 o'clock in 2017.2.1.

(2-2) Fuel Cell System Hereinafter, the fuel cell system 30 will be described. First, a configuration in which the fuel cell system 30 is disposed in each home as a distributed power supply will be described. FIG. 3 is a configuration diagram when a fuel cell system is disposed in each home as a distributed power supply.

(A) Configuration of a Household Equipped with a Fuel Cell System As shown in FIG. 3, each household 45 is equipped with a fuel cell system 30 including a power generation unit 300a including a fuel cell 50 for generating electric power described later and a hot water storage tank 300b. Is installed. Moreover, as equipment used in each home 45, as shown in FIG. 3, for example, hot water supply equipment such as a water heater 45a and a bath 45b, and household appliances such as an air conditioner 45c, a light 45d, a television 45e and a refrigerator 45f Equipment and the like. The hot water supply equipment such as the hot water heater 45a and the bath 45b is connected to the hot water storage tank 300b of the fuel cell system 30, and receives supply of hot and cold water from the hot water storage tank 300b.
Further, each home 45 not only receives the supply of the generated power generated by the fuel cell system 30, but is also connected to the commercial power grid 35 to receive the supply of the grid power. Therefore, home appliances such as the air conditioner 45c, the lighting 45d, the television 45e and the refrigerator 45f of each home 45 are at least either of the generated power from the power generation unit 300a of the fuel cell system 30 and the grid power from the commercial power grid 35. It is driven by the supply of power from the head.

(B) Fuel Cell System The fuel cell system 30 (30a, 30b, 30c,...) Provided in each home will be described below. FIG. 4 is a block diagram of a fuel cell system.
The fuel cell system 30 includes the power generation unit 300a and the hot water storage tank 300b as described above. The electric power generation unit 300a basically includes a fuel cell 50 that generates electric power by causing a fuel gas and an oxygen gas to react, a heat exchanger 60 that recovers the heat of the combustion exhaust gas discharged from the fuel cell 50, and the heat exchanger 60. The water purifier 70 which recovers and refines the condensed water from the combustion exhaust gas after the heat recovery by heat treatment, the reforming water tank 80 which recovers the condensed water refined by the water purifier 70, and the condensed water independently And a water supply unit 90 capable of supplying water to the reforming water tank 80.
Further, as shown in FIG. 1, each fuel cell system 30 (30a, 30b, 30c,...) Is controlled and operated by the operation control unit 33 (33a, 33b, 33c,...). In the present embodiment, the operation control unit 33 receives a command of the stand-alone operation preparation control from the management control unit 21 of the management device 20, extracts the stand-alone operation preparation control corresponding to the command, and controls the fuel cell system 30.
Hereinafter, the configuration of each part of the fuel cell system 30 will be described.

  The fuel cell 50 includes a reformer 52 that steam-reforms the raw fuel (for example, the city gas 13A) supplied via the raw fuel flow path 51 to generate a fuel gas, and the fuel gas flow path 53. The anode 55 to which the fuel gas generated by the reformer 52 is supplied, the cathode 56 to which air (an example of oxygen gas) is supplied via the air flow path 54, and the anode 55 and the cathode 56 And an electrolyte 57 for generating electric power by causing the supplied fuel gas and air to react with each other. A fuel cell is constituted by the anode 55, the cathode 56 and the electrolyte 57, and a cell stack is constituted by a plurality of fuel cells.

  The fuel cell 50 includes a combustion unit 58 to which the fuel gas and air discharged after being used for the power generation reaction from the anode 55 and the cathode 56 are supplied, and remains in the fuel gas by the combustion unit 58. The fuel component is burned to generate a flue gas. As described later, water is supplied to the reformer 52 from the reforming water tank 80 through the water supply passage 82, and the reformer 52 is supplied from the reforming water tank 80. Water is used to perform steam reforming of raw fuel.

Further, in the raw fuel passage 51, a microcomputer meter 46 is provided. The microcomputer meter 46 is a meter that measures the amount of fuel supplied to each home, and measures the amount of fuel supplied to the fuel cell 50 and the amount of fuel supplied to other gas devices and the like. Therefore, although not shown in FIG. 4, the raw fuel passage 51 provided with the microcomputer meter 46 is connected not only to the fuel cell 50 but also to other gas devices.
The microcomputer meter 46 normally detects that the fuel leaks when the measured value of the fuel flow rate does not fall below the predetermined value over a predetermined gas leakage determination period (for example, 30 days). In this case, when the fuel cell 50 is continuously operated for a long time and the supply of fuel is continued, the microcomputer meter 46 may erroneously detect the leak as the leak although the fuel does not leak. Therefore, a fuel supply stop period is provided in which the power generation by the fuel cell 50 is stopped and the supply of fuel to the fuel cell 50 via the raw fuel passage 51 is stopped. When the microcomputer meter 46 detects fuel during this fuel supply stop period, gas leakage can be accurately detected.

  The flue gas discharged from the fuel cell 50 is supplied to the heat exchanger 60 through the flue gas supply passage 61, and the flue gas after heat recovery is exhausted through the flue gas discharge passage 62. Then, the hot water from the hot water storage tank 300 b is supplied to the heat exchanger 60 through a circulation passage 63 that circulates hot water through the hot water storage tank 300 b for storing hot water and the heat exchanger 60. The heat exchanger 60 exchanges heat between the combustion exhaust gas discharged from the fuel cell 50 and the hot water. The circulation path 63 is provided with a circulation pump 64, a radiator 65 provided with a heat radiation fan 65a, and a temperature sensor (not shown). Further, the hot water storage tank 300b is provided with a hot water discharge passage 31 for pouring hot water in the hot water storage tank 300b, and a water supply passage 32 for supplying water to the hot water storage tank 300b according to the hot water discharge.

  The reforming water tank 80 is for recovering the condensed water generated from the combustion exhaust gas discharged from the fuel cell 50, and in the present embodiment, the condensed water is recovered from the combustion exhaust gas after heat recovery by the heat exchanger 60. It is supposed to Further, in the present embodiment, the condensed water supplied to the reforming water tank 80 is purified by the water purifier 70. Specifically, the condensed water recovery passage from the flue gas flowing through the exhaust gas discharge passage 62 The condensed water is recovered to the water purifier 70 via 71, and the condensed water purified by the water purifier 70 is recovered to the reforming water tank 80 via the condensed water recovery path 81. The condensed water stored in the reforming water tank 80 (and the water supplied from the water supply unit 90) can be supplied to the reformer 52 through the water supply passage 82 by the operation of the pump 83. There is. Further, the reforming water tank 80 is provided with a water level detector 84 so that the water level in the reforming water tank 80 can be detected.

  Further, water can be supplied to the reforming water tank 80 from the water supply unit 90 independently of the condensed water. Specifically, the water supply unit 90 is configured to supply tap water, and as the water injection operation, the operation control unit opens the valve 92 according to the water injection command to supply makeup water from the water supply unit 90. Water is supplied via the passage 91. Then, the water injection amount from the start of water injection operation is measured by the flow meter 93, and water injection is performed until the water injection amount reaches a predetermined target water injection amount. Further, since tap water is likely to contain more impurities than condensed water, the water supply unit 90 can supply water to the reforming water tank 80 via the water purifier 70 in the water injection operation, and the impurities After the water is removed, the water is supplied to the reforming water tank 80.

  The fuel cell system 30 further includes a power conversion device (not shown) in addition to the power generation unit 300a and the hot water storage tank 300b. The power conversion device is configured such that the DC voltage of the DC power generated by the fuel cell system 30 can be converted to the AC power of the system power of the commercial power system 35 so that the fuel cell system 30 and the commercial power system 35 can be interconnected. Convert to voltage.

(2-3) Management Device Next, the management device 20 will be described. The management device 20 includes a management control unit 21 and a storage unit 23. The management control unit 21 accesses the storage unit 13 of the information collection site 10 via the network 40, and an area where the supply of the system power is stopped, a system stop start time when the supply stop of the system power is started, The power failure information including the system restart time at which the supply of the system power is resumed is acquired. Then, the management control unit 21 instructs the operation control unit 33 to perform preparation control of the fuel cell system 30 based on the blackout information.
Further, the management control unit 21 stores the acquired power failure information in the storage unit 23. As an example of the power failure information stored in the storage unit 23, the power failure information illustrated in FIG. 2 stored in the above-described storage unit 13 can be given. Here, it is assumed that the information in the storage unit 23 and the information in the storage unit 13 are the same. However, the management control unit 21 may selectively acquire necessary information from the power failure information in the storage unit 13, and the storage unit 23 may store the selected information.
Further, FIG. 5 is a correspondence diagram showing the correspondence between the area and the fuel cell system being deployed. As shown in FIG. 5, the storage unit 23 associates and stores which fuel cell system 30 is deployed for each of a plurality of areas A, B, C,. ing. For example, in the area A, fuel cell systems Aa, Ab, and Ac are provided.

(3) Independent Operation Preparation Control Next, the independent operation preparation control of the fuel cell system 30 will be described.
The management control unit 21 transmits a command based on the power failure information acquired as described above to the operation control unit 33, and instructs the operation control unit 33 to control the fuel cell system 30 for a stand-alone operation.
Here, in the system shutdown period which is a period between the system shutdown start time and the system restart time, the fuel cell system 30 needs to be in a self-sustaining state in a state of being disconnected from the system power supply. Therefore, at least at the system shutdown start time, the fuel cell system 30 needs to be operated independently. A stand-alone operation preparation control is performed for this stand-alone operation. Therefore, the self-sustaining operation preparation control is control for making the fuel cell system 30 prepare for the self-sustaining operation before the fuel cell system 30 performs the self-sustaining operation. The self-sustaining operation preparation control is preferably performed before the start of the self-sustaining operation, and preferably ends at a system stop start time at which the self-sustaining operation is started. However, the self-sustaining operation preparation control may be performed before the start of the self-sustaining operation, and may be continuously performed even after the system stop start time at which the self-sustaining operation is started.

The operation control unit 33 extracts a process for preparing the self-standing operation of the fuel cell system 30 based on the command from the storage unit of the operation control unit 33 and performs the extracted process.
In the following description of the stand-alone operation preparation control, the power failure information stored in the storage unit 23 is shown in FIG.

(3-1) Overall Flow of Stand Alone Operation Preparation Control First, the overall flow of the stand alone operation preparation control will be described. FIG. 6 is a flow chart showing an example of the overall flow of the stand-alone operation preparation control.
Step S1: The management control unit 21 acquires power failure information from the information collection site 10 via the network 40 (FIG. 2). For example, in the area A, the management control unit 21 acquires power failure information that the grid stop start time is 0 o'clock of 2017.2.1 and the grid restart time is 6 o'clock of 2017.2.1.
Next, the management control unit 21 extracts the fuel cell system 30 deployed in the area where the power failure is implemented from FIG. For example, when the management control unit 21 acquires the power failure information of the area A in FIG. 2, the management control unit 21 extracts the fuel cell systems Aa, Ab, Ac,... Deployed in the area A from FIG. Then, the management control unit 21 transmits the power failure information to the operation control unit 33 of the extracted fuel cell system 30 (Aa, Ab, Ac). The power failure information also corresponds to a command for instructing the operation control unit 33 to execute the stand-alone operation preparation control.
The management control unit 21 performs the above-described processing sequentially or in parallel for areas where a power failure is planned, and causes the fuel cell system 30 in each area to perform self-sustaining operation preparation control.

The operation control unit 33 receives the blackout information as a command to perform the stand-alone operation preparation control, and extracts the processing of the next steps S10 to S40 from the storage unit of its own as the stand-alone operation preparation control based on the command. Perform stand-alone operation preparation control.
Step S10: The operation control unit 33 performs stop adjustment processing for adjusting the fuel supply stop period for the microcomputer meter 46 to accurately detect the gas leak based on the power failure information.
Step S20: The operation control unit 33 performs a reforming water increase process to increase the reforming water based on the power failure information.
Step S30: The operation control unit 33 performs the hot water treatment of the hot water storage tank 300b based on the power failure information.
Step S40: The operation control unit 33 performs an output suppression cancellation process when the output suppression by the learning operation is performed based on the power failure information.

  A fuel cell system to be executed after the self-sustaining operation preparation control, such as securing a longer period of the self-sustaining operation in the grid stop period by performing the above-mentioned self-sustaining operation preparation control 30 independent driving can be promoted. Then, when the system shutdown period has elapsed, the operation control unit 33 cancels the stand-alone operation preparation control and controls the fuel cell system 30 in the normal operation. For example, the operation control unit 33 controls the fuel cell system 30 based on the learning operation when the system restart time has elapsed.

  The operation control unit 33 performs the above-described stand-alone operation preparation control, and controls the fuel cell system 30 to execute the stand-alone operation at least at the system stop start time. That is, the operation control unit 33 controls the fuel cell system 30 to perform the self-sustaining operation at the system shutdown start time or before the system shutdown start time. For example, when starting the autonomous operation of the fuel cell system 30, the operation control unit 33 disconnects the fuel cell system 30 from the commercial power system 35 at the system shutdown start time or before the system shutdown start time. Also, for example, the operation control unit 33 may be a pump for supplying the raw fuel to the fuel cell 50, an air blower for supplying air to the fuel cell 50, and a pump 83 for supplying reforming water to the reformer 52. Control such as securing the power of devices necessary for the fuel cell system 30 to operate in a self-supporting manner, etc. from other than the system power supply is performed.

  Below, above-mentioned step S10 (stop adjustment processing), step S20 (reforming water increase processing), step S30 (discharge water processing), and step S40 (output suppression cancellation processing) are explained.

(3-2) Stop Adjustment Process FIG. 7 is a flowchart showing an example of the flow of the stop adjustment process.
Step S11: The operation control unit 33 reads out the fuel supply stop period set in the microcomputer meter 46. The fuel supply stop period is stored, for example, in a storage unit in the microcomputer meter 46 or the like. In addition, the operation control unit 33 determines, from the power failure information, a system stop period in which the supply of the system power is stopped. Then, the operation control unit 33 determines whether the fuel supply stop period and the system stop period overlap. If the fuel supply stop period and the system stop period overlap (Yes in step S11), the operation control unit 33 advances the process to step S12. On the other hand, if not (No in step S11), the operation control unit 33 ends the process.
For example, in FIG. 2, in the area A, since the grid stop start time is 0 o'clock of 2017.2.1 and the grid restart time is 6 o'clock of 2017.2.1, the grid stop period is 2017.2, 1 o'clock 0 o'clock to 6 o'clock. Here, it is assumed that the fuel supply stop period is 23:59 from 0 o'clock to 2017.1 of 2017.2.1. In this case, the operation control unit 33 determines that the system stop period and the fuel supply stop period overlap in part.

Step S12: The operation control unit 33 changes the fuel supply stop period to a period other than the system stop period so that the fuel supply stop period does not overlap with the system stop period. For example, according to the above-mentioned example, since the system stop period is from 0 o'clock to 6 o'clock in 2017.2.1, the fuel supply stop period is from 0 o'clock in 2017.2.2 to 23:59 in 172.2. Change to minutes.
When the fuel cell 50 is stopped to stop the fuel supply to the fuel cell 50 in order to detect the leak of the fuel by the microcomputer meter 46, the fuel cell 50 can not generate power. Therefore, the fuel supply stop period is changed to a period other than the system stop period, and the fuel supply is continued in the system stop period. Thus, the fuel cell system 30 can perform power generation in a self-sustained operation without being affected by the fuel supply stop period during the system stop period. That is, it is possible to secure a longer self-sustaining operation period without being affected by the fuel supply stop period.

  The fuel supply stop period may be before the system stop period or after the system stop period among the periods other than the system stop period. In addition, when the fuel supply stop period is changed before the system stop period, the fuel cell system 30 is operated in a self-sustaining manner at least at the system stop start time between the end of the fuel supply stop period and the system stop start time. It is preferable to take into consideration the return time to return to the ready state. That is, it is preferable that at least the aforementioned return time be included in the period between the end of the fuel supply stop period and the system stop start time.

(3-3) Reforming Water Increase Processing FIG. 8 is a flowchart showing an example of the flow of the reforming water increase processing.
Step S21: The operation control unit 33 determines whether or not the current time is within X hours before the system stop start time.
The X time is the time required to increase the reforming water to the reforming water tank 80, and is, for example, the time required to fill the reforming water tank 80 with water. The X time is defined by, for example, the average time required to fill the reforming water tank 80, and is defined as, for example, 4 hours.
In addition, for example, the operation control unit 33 detects the water level of the reforming water tank 80 from the water level detector 84 of the reforming water tank 80 at the current time, and the time required for the reforming water tank 80 to be full The calculated time may be defined as X time.

  If the current time is within X hours before the system shutdown start time (Yes in step S21), the operation control unit 33 advances the process to step S22. On the other hand, if not (No in step S21), the operation control unit 33 continues the process of step S21.

  For example, it is assumed that the current time is 19:00 on 2017.1.31, the grid stop start time is 0 on 2017.2.1, and the X time is 4 hours. In this case, the operation control unit 33 determines that the current time (19:00, 2017.1.31) is five hours earlier than the grid stop start time (0,00, 2017.2.1). It is determined that 4 hours is exceeded. In this case, the operation control unit 33 repeats the process of step S21.

  Further, for example, it is assumed that the current time is 20 o'clock 2017.31, the system stop start time is 0 o'clock 2017 2017, and the X time is 4 hours. In this case, since the current time (20 o'clock of 2017.1.31) is four hours before the system stop start time (0 o'clock of 2017.2.1), the operation control unit 33 takes X hours ( Determined to be within 4 hours). In this case, reformed water is stored over 4 hours from the current time by performing the processes of steps S22 and S23 described later, and the system stop start when 4 hours (= X time) has elapsed from the current time At the time, the reforming water tank 80 becomes full of reforming water.

  Also, for example, it is assumed that the current time is 21:00 on 2017.1.31, the grid stop start time is 0 on 2017.2.1, and the X time is 4 hours. In this case, since the current time (21 o'clock of 2017.1.31) is three hours earlier than the grid stop start time (0 o'clock of 2017.2.1), the operation control unit 33 takes X hours ( Determined to be within 4 hours). Then, by performing the processing of steps S22 and S23 described later, the reforming water is stored in the reforming water tank 80 in 3 hours from the current time, and 3 hours (<X time) are from the current time. At the elapsed system shutdown start time, although the reforming water tank 80 is not full, reforming water stored in 3 hours is stored in the reforming water tank 80. Thereafter, the process of storing the reforming water may be continued even after the system shutdown start time has elapsed.

Step S22: The operation control unit 33 determines whether or not the reforming water tank 80 is at or above the reforming water threshold. The reformed water threshold indicates the amount of reformed water that allows the fuel cell system 30 to operate in a self-sustaining manner when the fuel cell system 30 is in a state of being disconnected from the system power supply due to a power failure. For example, the reforming water threshold can be set to about 80% of the capacity (full water) of the reforming water tank 80, and can also be set to 100%.
If the reforming water tank 80 is not at or above the reforming water threshold (No in step S22), the operation control unit 33 advances the process to step S23. On the other hand, if it is equal to or higher than the reforming water threshold (Yes in step S22), the operation control unit 33 ends the process.

  Step S23: The operation control unit 33 controls the fuel cell system 30 to increase the amount of reforming water. For example, the operation control unit 33 controls the reforming water tank 80 storing the reforming water to be in a state close to full or full. Thus, in order to increase the amount of reforming water, for example, the operation control unit 33 performs control to fix the generated power of the fuel cell system 30 at a low output lower than the rated output, and S / C (Steam Carbon ratio). At least one control of the control to lower than the initial value and the control of discharging the hot water from the hot water storage tank 300b of the fuel cell system 30 is performed.

  The operation control unit 33 maintains the temperature of the fuel cell system 30 low by controlling the generated power of the fuel cell system 30 to a low output lower than the rated output. For example, while the rated output is 700 W, it is fixed at a low output of 200 W. For example, the operation control unit 33 controls the amount of raw fuel supplied to the fuel cell 50 via the raw fuel passage 51, controls the amount of air supplied to the fuel cell 50 via the air passage 54, etc. Output suppression is performed. By such control, the temperature of the fuel cell system 30 is lowered, and the condensation of the combustion exhaust gas emitted from the fuel cell 50 is promoted.

  In addition, the operation control unit 33 controls the generated power of the fuel cell system 30 to a low output that is lower than the rated output by lowering the S / C to an initial value. For example, the operation control unit 33 reduces the S / C initial value to 2.2 while the initial value is 2.6. For example, the operation control unit 33 adjusts the amount of raw fuel supplied to the fuel cell 50 via the raw fuel passage 51, and the reformed water supplied from the reformed water tank 80 by the control of the pump 83. Adjust the amount of By such control, the temperature of the fuel cell system 30 is lowered, and the condensation of the combustion exhaust gas emitted from the fuel cell 50 is promoted.

  Further, the operation control unit 33 performs control so that the hot water storage tank 300b discharges water, and lowers the temperature of the hot and cold water in the hot water storage tank 300b. For example, the operation control unit 33 controls the hot water in the hot water storage tank 300b to be discharged from the hot water discharge path 31, and controls so as to supply water from the water supply path 32 to the hot water storage tank 300b according to the hot water discharge. Thereby, the temperature of the hot water supplied to the heat exchanger 60 is lowered, and the heat exchanger 60 promotes the condensation of the water in the flue gas.

As described above, in the stand-alone operation preparation control started before the system shutdown start time, the condensation of the water in the combustion exhaust gas is promoted to promote the recovery of the reforming water from the combustion exhaust gas. Control to increase the reforming water. As a result, during the system shutdown period, the fuel cell system 30 can perform power generation by self-sustaining operation using the increased reforming water. Further, by increasing the reforming water in advance, the self-sustaining operation of the fuel cell system 30 can be performed longer than in the case where the reforming water is not increased.
Since it takes time to condense the combustion exhaust gas discharged from the fuel cell 50 and increase the amount of reforming water, it is preferable to perform the reforming water increasing process at an early stage of the self-standing operation preparation control.

  In step S21, it is determined whether the current time is within X time (the time required to fill the reforming water tank 80) with respect to the system stop start time. However, in step S21, it may be determined whether the current time is X + α time before the system stop start time, and the processes of steps S22 and S23 may be performed. The α time is, for example, a time shorter than X time, such as 10 minutes. As described above, by determining whether the current time is within X + α time before the system stop start time, when the current time becomes X + α time before the system stop start time, the processing of steps S22 and S23 described later is performed. To be done. As a result, at the time when X time has elapsed from the current time, it is possible to fill the reforming water tank 80 with reforming water α hours before the system stop start time.

(3-4) Wastewater Treatment FIG. 9 is a flowchart showing an example of the flow of the wastewater treatment.
Step S31: The operation control unit 33 determines whether or not the current time is within Y hours before the system stop start time.
Y time is the time required to drain the hot water of the hot water storage tank 300b. Furthermore, even after the hot water of the hot water storage tank 300b is discharged, the hot water is stored again in the hot water storage tank 300b by the driving of the fuel cell system 30. Therefore, it is preferable that the time required to drain the hot water of the hot water storage tank 300b as Y time is defined as the system stop start time, to the extent that the self sustaining operation of the fuel cell system 30 is not disturbed. Therefore, here, as an example, Y time is a time shorter than X time, and is defined as a short time before the system stop start time. For example, Y time is defined as 1 hour.

  If the current time is within Y time before the system stop start time (Yes in step S31), the operation control unit 33 advances the process to step S32. On the other hand, if not (No in step S31), the operation control unit 33 continues the process of step S31.

  For example, it is assumed that the current time is 22 o'clock in 2017.1.31, the grid stop start time is 0 o'clock in 2017.2.1, and the Y time is 1 hour. In this case, since the operation control unit 33 is two hours earlier than the system stop start time (0 o'clock of 2017.2.1), the current time (22:00 of 2017.1.31) is Y hours ( It is determined that 1 hour is exceeded. In this case, the operation control unit 33 repeats the process of step S31.

  Also, for example, it is assumed that the current time is 23:00 on 2017.1.31, the grid stop start time is 0 on 2017.2.1, and the Y time is 1 hour. In this case, since the current time (23 o'clock of 2017.1.31) is one hour earlier than the grid stop start time (0 o'clock of 2017.2.1), the operation control unit 33 performs Y time ( It is determined that it is within 1 hour). In this case, the process proceeds to step S32, and hot and cold water is discharged from the hot water storage tank 300b.

  Further, for example, it is assumed that the current time is 23:15 in 2017.1.31, the grid stop start time is 0 o'clock in 2017.2.1, and the Y time is 1 hour. In this case, since the current time (23:15 of 2017.1.31) is 45 minutes before the system stop start time (0 o'clock of 2017.2.1), the operation control unit 33 It is determined that it is within the time (one hour). In this case, the process proceeds to step S32, and hot and cold water is discharged from the hot water storage tank 300b for 45 minutes until the system stop start time. In this case, although hot water is not completely discharged from the hot water storage tank 300b at the system stop start time, a certain amount of hot water can be discharged from the hot water storage tank 300b. After that, the hot water discharge may be continued even after the system stop start time has passed.

  Step S32: The operation control unit 33 controls the hot water tank 300b to drain hot water and the temperature of the hot water in the hot water tank 300b is lowered. For example, the operation control unit 33 controls the hot water in the hot water storage tank 300b to be discharged from the hot water discharge path 31, and controls so as to supply water from the water supply path 32 to the hot water storage tank 300b according to the hot water discharge.

Thereby, the temperature of the fluid in the hot water storage tank 300b is lowered by discharging the hot water in the hot water storage tank 300b. Thereby, heat exchange by the heat exchanger 60 between the fluid whose temperature is reduced from the hot water storage tank 300b and the heat from the combustion exhaust gas is promoted, and the temperature of the fluid is raised to be easily stored in the hot water storage tank 300b as hot water. Become. By promoting heat exchange between the heat exchanger 60 and the fluid whose temperature of the hot water storage tank 300b is lowered as described above, the operation of the fuel cell system 30 becomes smooth, and the self-sustaining operation can be promoted. In addition, since the temperature of the fluid in the hot water storage tank 300b is lowered, the condensation of the water in the combustion exhaust gas emitted from the fuel cell 50 can also be promoted, and the reforming water used for the independent operation can be recovered from the combustion exhaust gas. Also by this, the self-sustaining operation of the fuel cell system 30 can be promoted.
Since hot and cold water is stored in the hot water storage tank 300b while the fuel cell 50 is operated even if hot and cold water is discharged from the hot water storage tank 300b, it is preferable to perform the hot water treatment immediately before the system shutdown period.

  In step S31, it is determined whether or not the current time is within Y time (the time required to drain the hot water tank 300b) with respect to the system stop start time. However, in step S31, it may be determined whether the current time is Y + β time before the system stop start time, and the process of step S32 may be performed. The β time is, for example, a time shorter than Y time, such as 10 minutes. Thus, by determining whether the current time is within Y + β time before the system stop start time, the process of step S32 described later is performed when the current time becomes Y + β time before the system stop start time. . Thereby, it is the time when Y time has passed from the present time, and hot water can be discharged from the hot water storage tank 300b β time before the system stop start time.

(3-5) Output Suppression Release Processing FIG. 10 is a flowchart showing an example of the flow of the output suppression release processing.
The management device 20 or the operation control unit 33 learns the operating condition of the fuel cell 50, and can control the fuel cell system 30 according to a learning operation for controlling the generated power generated by the fuel cell 50 based on this learning. It shall be. Then, in this learning operation, there may be a case where output suppression control is performed in which the generated power in the fuel cell 50 is suppressed because the power demand is small.
Step S41: The operation control unit 33 determines whether the current time is within Z time before the system stop start time.
The Z time is, for example, a time required for the fuel cell system 30 to cancel the output suppression of the power generated by the fuel cell 50 based on the learning operation. Here, as an example, the Z time is a time shorter than the Y time, and is defined as a short time before the system stop start time. For example, Z time is defined as 0.5 hours.

If the current time is within Z time before the system stop start time (Yes in step S41), the operation control unit 33 advances the process to step S42. On the other hand, if not (No in step S41), the operation control unit 33 continues the process of step S41.
For example, it is assumed that the current time is 23:30 of 2017.1.31, the grid stop start time is 0 o'clock of 2017.2.1, and the Z time is 0.5 hour. In this case, the operation control unit 33 is 0.5 hours before the current time (23:30 of 2017.1.31) with respect to the system stop start time (0 o'clock of 2017.2.1). , Z time (0.5 hours) or less. In this case, the operation control unit 33 advances the process to step S42.

Step S42: The operation control unit 33 determines whether or not the fuel cell system 30 is controlled by the learning operation. Here, the learning operation refers to, for example, control for learning the situation of household load every hour of the day and operating the fuel cell system 30 according to the learned household load. Therefore, as a result of learning of the home load, the fuel cell system 30 is controlled such that the power generation output thereof is suppressed in the time when the load on the fuel cell 50 is small.
At present, when the operation control unit 33 determines that the fuel cell system 30 is being operated by the learning operation (Yes in step S42), the operation control unit 33 advances the process to step S43. On the other hand, if not (No in step S42), the operation control unit 33 ends the process.

Step S43: The operation control unit 33 determines whether or not the power generated by the fuel cell system 30 is suppressed by the fuel cell system 30 by the learning operation.
The case where the generated power is suppressed is, for example, the case where the generated power is controlled to a low output lower than the rated output. For example, control of the amount of generated fuel supplied to the fuel cell 50 via the raw fuel passage 51, control of the amount of air supplied to the fuel cell 50 via the air passage 54, etc. Is done. Moreover, suppression of generated electric power is performed by lowering S / C from an initial value. In this case, for example, the amount of raw fuel supplied to the fuel cell 50 via the raw fuel passage 51 is adjusted, and the amount of reformed water supplied from the reformed water tank 80 is controlled by the control of the pump 83. Adjusted etc.
If the operation control unit 33 determines that the generated power is suppressed (Yes in step S43), the operation control unit 33 advances the process to step S44. On the other hand, if not (No in step S43), the operation control unit 33 ends the process.

Step S44: The operation control unit 33 cancels the control to suppress the generated power before the grid stop start time. Thus, the fuel cell system 30 can operate, for example, the generated power at the rated output.
In a state where the fuel cell system 30 is disconnected from the system power supply, if the power generated by the fuel cell 50 is suppressed, there is a possibility that the power demand can not be met. Therefore, the operation control unit 33 cancels the output suppression control for suppressing the generated power in the stand-alone operation preparation control. Thereby, the fuel cell 50 can perform self-sustaining power generation corresponding to the power demand.
The output suppression cancellation process is preferably performed immediately before the system shutdown period since it is preferable to operate the fuel cell system 30 efficiently by the learning operation until the system shutdown period.

  In step S41, the current time is within Z time (the time required to cancel the output suppression of the generated power of the fuel cell 50 based on the learning operation) relative to the grid stop start time. It is determined whether there is any. However, in step S41, it may be determined whether the current time is Z + γ time before the system stop start time, and the processes of steps S42 to S44 may be performed. The γ time is, for example, a time shorter than Z time, such as 10 minutes. As described above, by determining whether the current time is within Z + γ time before the system stop start time, when the current time becomes Z + γ time before the system stop start time, the processing of steps S42 to S44 described later is performed. To be done. As a result, at the time when the Z time has elapsed from the current time, the control for suppressing the generated power is canceled γ time before the grid stop start time.

  In the above-described present embodiment, in the fuel cell control system 100, the management device 20 and the fuel cell system 30 are connected via the network 40. The management device 20 acquires power failure information including the system stop start time and the system restart time via the network 40 for the supply stop of the system power. Then, the operation control unit 33 controls the fuel cell system 30 to execute the stand-alone operation at the system stop start time, and performs the above-mentioned stand-alone operation preparation control before the execution of the stand-alone operation. Therefore, control of execution of the self-sustaining operation and self-sustaining operation preparation control can be executed using the power failure information acquired from the outside of the fuel cell system 30 via the network 40.

  Further, the operation control unit 33 starts the stand-alone operation preparation control before the fuel cell system 30 executes the stand-alone operation at the system stop start time. Therefore, the fuel cell system is executed after the self-sustaining operation preparation control, such as securing a longer period of the self-sustaining operation in the grid stop period by executing the self-sustaining operation preparation control 30 independent driving can be promoted.

[Another embodiment]
(1) In the above embodiment, step S10 (stop adjustment process), step S20 (reforming water increase process), step S30 (discharge water process) and step S40 (output suppression cancellation process) are performed in the stand-alone operation preparation control. It is However, in the autonomous driving preparation control, at least one of the above-described processes may be performed.
Moreover, the above-mentioned process does not have to be performed in the order of step S10 (stop adjustment process), step S20 (reforming water increase process), step S30 (discharge water treatment) and step S40 (output suppression cancellation process). It may be

(2) In the above embodiment, when the current time is within Y time before the system stop start time in step S31 of FIG. 9 in the discharge water process, the hot water storage tank 300b is discharged in step S32. In this waste water treatment, it may be determined whether or not the amount of hot water with high temperature of the hot water storage tank 300 b is equal to or more than the hot water storage threshold value, and the hot water may be discharged from the hot water storage tank 300 b.
For example, between step S31 and step S32, the operation control unit 33 determines whether the hot water in the hot water storage tank 300b is higher than or equal to the hot water storage threshold.

  When hot water with high temperature is stored in the hot water storage tank 300b in a full water state, the self-sustaining operation by the fuel cell system 30 is hindered when the fuel cell system 30 is disconnected from the system power supply due to a power failure. This is because hot water of high temperature is supplied from the hot water storage tank 300b to the heat exchanger 60 through the circulation path 63, thereby promoting condensation of the water in the combustion exhaust gas in the heat exchanger 60 and recovering the reforming water It is difficult to do. Therefore, the fuel cell system 30 burns the fuel to recover the reforming water from the combustion exhaust gas and recovers the heat and stores it in the hot water storage tank 300b, thereby inhibiting the self-sustaining operation.

Therefore, as the hot water storage threshold of high temperature water, the value of the hot water storage amount of high temperature to the extent that the self-sustaining operation of the fuel cell system 30 is inhibited is set. That is, if hot water having a value (the hot water storage threshold value) or more is stored in the hot water storage tank 300b, the self-sustaining operation of the fuel cell system 30 may be inhibited. As the hot water storage threshold value, for example, the volume of hot water having a high temperature can be set to about 80% or 100% of the capacity of the hot water storage tank 300b. Note that, for example, temperature sensors are provided at a plurality of locations of the hot water storage tank 300b, and the operation control unit 33 has a high temperature stored in the hot water storage tank 300b based on the position of the temperature sensor and the detected temperature. The amount of hot water storage can be measured.
If the hot water of the hot water storage tank 300b is higher than or equal to the hot water storage threshold, the operation control unit 33 proceeds to step S32 in FIG. If not, the operation control unit 33 does not perform the drainage process and ends the process.

  (3) In the above embodiment, when the learning operation is being performed in the output suppression cancellation process (Yes in step S42), the fuel cell 50 is further controlled to suppress the output in step S43 ( In step S43, the output suppression is canceled. However, when the learning operation is being performed (Yes in step S42), the control of the fuel cell system 30 by the learning operation may be canceled. In this case, the processes of steps S43 and S44 are omitted.

  (4) In the above embodiment, the management control unit 21 instructs the operation control unit 33 to prepare the fuel cell system 30 for stand-alone operation. That is, the operation control unit 33 acquires the power failure information from the management control unit 21, extracts the processing for controlling the fuel cell system 30 in a stand-alone operation by using the power failure information as a command, and extracts the processing I do. However, the management control unit 21 may give the operation control unit 33 a command including specific stand-alone operation preparation control.

  For example, in the “stop adjustment process” of the above-described embodiment, the management control unit 21 determines whether the fuel supply stop period and the grid stop period overlap, and if the fuel supply stop period overlaps, the system stops the fuel supply stop period. It instructs the operation control unit 33 to change to a period other than the period.

  Also, for example, in the “reforming water increase processing” of the above-described embodiment, the management control unit 21 instructs the operation control unit 33 to increase the reforming water. For example, as a specific control to increase the reforming water, the management control unit 21 fixes the generated power of the fuel cell system 30 to a low output lower than the rated output and S / C (Steam Carbon ratio). The operation control unit 33 is specifically instructed to perform at least one control of the control to lower than the initial value and the control of discharging the hot water from the hot water storage tank 300b of the fuel cell system 30.

Further, for example, in the “discharge water processing” of the above-described embodiment, the management control unit 21 instructs the operation control unit 33 to discharge the water from the hot water storage tank 300 b.
Also, for example, in the “output suppression cancellation process” of the above-described embodiment, the management control unit 21 instructs the operation control unit 33 to cancel the output suppression in the learning operation.

  Note that the configurations disclosed in the above-described embodiment (including the other embodiments, and the same hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited thereto, and can be appropriately modified without departing from the object of the present invention.

10: information collection site 11: information collection unit 13: storage unit 20: management device 21: management control unit 23: storage unit 30: fuel cell system 33: operation control unit 35: commercial power system 80: reforming water tank 100: Fuel cell control system 300a: power generation unit 300b: hot water storage tank

Claims (8)

At least one fuel cell system having a fuel cell that receives supply of fuel and generates electric power, and an operation control unit;
The fuel cell system is communicably connected to the fuel cell system via a network, and with respect to the supply stop of the system power from the system power supply, the system stop start time at which the supply stop of the system power is started and the supply of the system power are resumed. A management device that acquires power failure information including system restart time via the network;
In a fuel cell control system comprising
The management device or the operation control unit controls the fuel cell system to execute a stand-alone operation at least at the grid stop start time in a state where the fuel cell system is disconnected from the grid power supply, and before the stand-alone operation is performed. A fuel cell control system that executes a stand-alone operation preparation control, which is preparation for the stand-alone operation, on the fuel cell system. The fuel cell system further includes a microcomputer meter for measuring the amount of supplied fuel.
The management device or the operation control unit stops the operation of the fuel cell and detects the supply of the fuel to the fuel cell in order to detect the leakage of the fuel by the microcomputer meter in the independent operation preparation control. The fuel supply stop period is changed to a period other than the grid stop period when the fuel supply stop period to be stopped overlaps with the grid stop period which is a period between the grid stop start time and the grid restart time. The fuel cell control system according to claim 1. The fuel cell system further includes a reforming water tank for storing reforming water to be supplied to the fuel cell,
The fuel cell control system according to claim 1 or 2, wherein the management device or the operation control unit performs control so as to increase the reforming water of the reforming water tank in the independent operation preparation control. The fuel cell system further includes a hot water storage tank for storing hot and cold water using heat of combustion exhaust gas discharged from the fuel cell,
The fuel cell control system according to any one of claims 1 to 3, wherein the management device or the operation control unit discharges the hot water in the hot water storage tank in the independent operation preparation control. The management device or the operation control unit controls the fuel cell system according to a learning operation in which the operation state of the fuel cell is learned and the generated power generated by the fuel cell is controlled based on the learning.
The said management apparatus or the said operation control part cancels | releases the said output suppression control in the said self sustaining operation preparation control, when performing output suppression control so that the generated electric power of the said fuel cell may be suppressed in the said learning operation. The fuel cell control system in any one of 1-4. At least one fuel cell system having a fuel cell that receives supply of fuel and generates electric power, and an operation control unit;
The fuel cell system is communicably connected to the fuel cell system via a network, and with respect to the supply stop of the system power from the system power supply, the system stop start time at which the supply stop of the system power is started and the supply of the system power are resumed. A management device that acquires power failure information including system restart time via the network;
In a fuel cell control system comprising a fuel cell control system comprising:
The management device or the operation control unit controls the fuel cell system to execute a stand-alone operation at least at the grid stop start time in a state where the fuel cell system is disconnected from the grid power supply, and before the stand-alone operation is performed. A fuel cell control method, wherein a self-sustaining operation preparation control which is preparation for the self-sustaining operation is executed on the fuel cell system. The independent operation preparation control is
In the self-sustaining operation preparation control, a fuel supply stop period in which the operation of the fuel cell is stopped and the supply of the fuel to the fuel cell is stopped in order to detect the leakage of the fuel by a microcomputer meter; Changing the fuel supply stop period to a period other than the system stop period when the system stop period which is a period between the stop start time and the system restart time overlaps;
Controlling to increase the reforming water of the reforming water tank for storing the reforming water to be supplied to the fuel cell;
Draining hot and cold water in a hot water storage tank for storing hot and cold water using heat of combustion exhaust gas discharged from the fuel cell;
In the learning operation for controlling the generated power generated by the fuel cell based on the learning of the operating condition of the fuel cell, the output suppression is performed when the output suppression control is performed so that the generated power of the fuel cell is suppressed Releasing the control;
The fuel cell control method according to claim 6, comprising at least one step of: An information collecting apparatus and a network holding power failure information including a system stop start time at which the supply stop of the system power is started and a system restart time at which the supply of the system power is resumed regarding the supply stop of the system power from the system power supply A fuel cell system communicably connected to each other and having a fuel cell that receives supply of fuel and generates electric power, and an operation control unit,
The operation control unit
Acquiring the power failure information from the information collecting apparatus via the network;
The fuel cell system is controlled so as to execute a self-sustaining operation at least at the system stop start time in a state where the fuel cell system is disconnected from the system power, and is a preparation for the self-sustaining operation before the self-sustaining operation Fuel cell system that performs stand-alone operation preparation control.

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