JP5296966B2 - Power supply equipment - Google Patents

Description

The present invention relates to a fuel cell interconnected to supply power to the plurality of electrical loads to a power system that supplies power to the plurality of electrical loads;
Surplus power consumption means for consuming surplus power of the fuel cell;
System-side blocking means for intermittently connecting the electric power system to the fuel cell and the plurality of electric loads;
A fuel cell side blocking means for intermittently connecting the fuel cell and the plurality of electric loads;
Operation control means for controlling operation is provided,
When the operation control means performs surplus power consumption processing for controlling the operation of the surplus power consumption means so as to consume surplus power of the fuel cell, and when an accident occurs in the power system, The present invention relates to a power supply facility configured to execute a shut-off process for switching the side shut-off means and the fuel cell side shut-off means to a shut-off state.

Such a power supply facility supplies power to a plurality of electric loads from the power system and the fuel cell. The surplus power of the fuel cell is consumed by surplus power consuming means so that the surplus power of the fuel cell is reduced. There is no reverse power flow to the power system.
Also, in the event of an accident such as a power failure in the power system, a shut-off process for switching the system-side shut-off means and the fuel cell-side shut-off means to the shut-off state is executed so that the fuel cell is disconnected from the commercial power and also from a plurality of electric loads. Thus, the fuel cell is prevented from being operated alone, and the fuel cell is prevented from tripping based on the fact that the load power of the electric load becomes larger than the generated power of the fuel cell.

  In such a power supply facility, conventionally, at the time of an accident in the power system, the operation control means connects a specific electric load set in advance due to high importance among a plurality of electric loads to the fuel cell. The power is supplied from the fuel cell to the specific electric load (see, for example, Patent Document 1).

JP 2005-268149 A

However, in the conventional power supply facility, when a power system failure occurs, power is supplied from the fuel cell to a specific electrical load that is set in advance, so that the specific electrical load is used in the event of a power system failure. It was not always what they wanted, and it was not easy to use.
By the way, when the user selects an arbitrary one of the plurality of electric loads and switches to a state where electric power is supplied from the fuel cell to the selected electric load, the electric load connected to the fuel cell The load power of the fuel cell may be larger than the power generated by the fuel cell, and if the load power of the electric load connected to the fuel cell is larger than the power generated by the fuel cell, the fuel cell may trip and stop. This is not preferable.

  The present invention has been made in view of such a situation, and an object of the present invention is to improve the degree of freedom in selecting an electric load to be supplied in the event of a power system failure while sufficiently suppressing a trip of the fuel cell. To supply supply equipment.

The power supply facility of the present invention includes a fuel cell interconnected to supply power to the plurality of electrical loads to a power system that supplies power to the plurality of electrical loads,
Surplus power consumption means for consuming surplus power of the fuel cell;
System-side blocking means for intermittently connecting the electric power system to the fuel cell and the plurality of electric loads;
A fuel cell side blocking means for intermittently connecting the fuel cell and the plurality of electric loads;
Operation control means for controlling operation is provided,
The operation control means is configured to execute a shut-off process for switching the system-side shut-off means and the fuel cell-side shut-off means to a shut-off state when an accident occurs in the power system,
The first characteristic configuration is provided with manually operated identification information input means for inputting identification information for each of the plurality of electric loads.
The operation control means is
After execution of the shut-off process, the actual generated power of the fuel cell, the power consumption already consumed by any of the plurality of electric loads of the actual generated power, and the plurality of electric loads stored in advance Based on the load power for each of the above, it is determined whether or not the load power of the electric load corresponding to the identification information input by the identification information input means can be covered by the generated power of the fuel cell. The present invention is characterized in that it is configured to execute a load application availability determination process for outputting a result.

That is, when an accident occurs in the power system, the user of the power supply facility selects a desired electrical load from a plurality of electrical loads, and manually identifies identification information corresponding to the selected electrical load. Input with information input means.
Then, after the cutoff processing is executed by the operation control means, the actual generated power of the fuel cell, the consumed power already consumed by any of the plurality of electric loads of the actual generated power, and a plurality of pre-stored Based on the load power for each of the electric loads, it is determined whether the load power of the electric load corresponding to the identification information input by the identification information input means can be covered by the generated power of the fuel cell, A load application possibility determination process for outputting the determination result is executed.

That is, the power consumption already consumed by one of the plurality of electric loads of the actual generated power of the fuel cell and the load power of the electric load corresponding to the identification information input by the identification information input means When the added power is lower than the actual generated power of the fuel cell, it is determined that the load power of the electric load corresponding to the identification information input by the identification information input means can be covered by the generated power of the fuel cell. The determination result is output.
Then, when such a determination result is output, if the electric load corresponding to the identification information input by the identification information input means is connected to the fuel cell, the fuel cell does not trip and the selected electric load is Electric power is supplied from the fuel cell.
Therefore, it is possible to supply power supply equipment that can improve the degree of freedom in selecting an electric load to be supplied with power in the event of a power system failure while sufficiently suppressing tripping of the fuel cell.

The second characteristic feature, in addition to the first feature structure,
The operation control means is configured to adjust the generated power of the fuel cell to a power corresponding to the currently requested load power, and consumes surplus power of the fuel cell after the shut-off process. In the state where the power consumption of the surplus power consumption means is adjusted, a rated output process for adjusting the generated power of the fuel cell to a rated power or a substantially rated power is executed.

  That is, the operation control means adjusts the generated power of the fuel cell to the power according to the currently requested load power, and the surplus power consumption means of the surplus power consumption means so as to consume the surplus power of the fuel cell after the shut-off process. In a state where the power consumption is adjusted, a rated output process for adjusting the generated power of the fuel cell to the rated power or approximately the rated power is executed.

That is, when an accident occurs in the power system, the generated power of the fuel cell is adjusted to the rated power or the approximately rated power after the fuel cell is disconnected from the power system.
And since the rated power of the fuel cell is set to the maximum generated power of the fuel cell or the power close to the maximum generated power, when the accident occurs in the power system, it does not exceed the generated power of the fuel cell. Thus, it is possible to select as many electrical loads as possible or an electrical load having a large load power and supply power to the selected electrical load.
Accordingly, it is possible to further improve the degree of freedom in selecting an electric load that supplies power in the event of a power system failure.

The third characteristic configuration, in addition to the configuration of the first or second feature,
When the condition that the operation control means is in an input stop state in which all of the plurality of electric loads cut off the power input from the fuel cell after the shut-off process is satisfied, the fuel cell-side shut-off means is The present invention is characterized in that a connection process for switching to a connection state is executed.

  That is, after the shut-off process by the operation control means, when the condition that all of the plurality of electric loads are in the input stop state in which the power input from the fuel cell is cut off is satisfied, the fuel cell-side shut-off means is brought into the connected state. A connection process for switching is executed.

That is, in order to supply electric power from a fuel cell to any one of the plurality of electric loads after an accident has occurred in the electric power system and a shut-off process for separating the fuel cell from the electric power system and the plurality of electric loads is executed, It is necessary to switch the battery side blocking means to the connected state.
Each of the plurality of electric loads is provided with intermittent means such as a switch for intermittently inputting power from the fuel cell.
Therefore, when the condition that all of the plurality of electric loads are in the input stop state in which the power input from the fuel cell is cut off is satisfied, the process for switching the fuel cell side shut-off means to the connected state is performed by the operation control means. Thus, when the fuel cell side shut-off means is switched to the connected state, the electric load in which the load power exceeds the generated power of the fuel cell is allowed to be input from the fuel cell. Tripping can be prevented.
Therefore, it is possible to further suppress tripping of the fuel cell when power is supplied from the fuel cell to any of the plurality of electric loads in the event of a power system failure.

In addition to any of the first to third feature configurations described above, the fourth feature configuration is
Power information measuring means for measuring power information corresponding to power is provided in a power supply line that supplies power to the plurality of electric loads from the power system or the fuel cell,
The operation control means is configured to be switchable to the individual load power storage mode,
In the individual load power storage mode, the load obtained from the power information measured by the power information measuring unit based on the identification information input by the identification information input unit and the measurement information of the power information measuring unit A feature is that power is stored as load power of an electric load corresponding to the identification information input by the identification information input means.

  That is, when the operation control unit is switched to the individual load power storage mode, the power information measured by the power information measuring unit based on the identification information input by the identification information input unit and the measurement information of the power information measuring unit. Is stored as the load power of the electrical load corresponding to the identification information input by the identification information input means.

That is, there is no difference from the actual load power of the electric load by setting the load power for each of the plurality of electric loads stored in the operation control means to be the load power obtained based on the actual measurement information of the power information measuring means. Or it can be appropriate with a small difference.
Whether or not the load power of the electric load corresponding to the identification information input by the identification information input means can be covered by the generated power of the fuel cell based on the load power for each of the plurality of electric loads. Therefore, the determination is appropriately made so that the load power of the electric load does not exceed the power generated by the fuel cell.
Therefore, it is possible to further suppress tripping of the fuel cell when power is supplied from the fuel cell to any of the plurality of electric loads in the event of a power system failure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
A power supply facility according to a first embodiment of the present invention will be described below with reference to the drawings.
The power supply facility includes a fuel cell 3 connected to a commercial power system 2 that supplies power to a plurality of electric loads 1 so as to supply power to the plurality of electric loads 1, and power generation of the fuel cells 3. An inverter 4 for grid connection that sets the power to the same voltage and the same frequency as the power supplied from the commercial power system 2, and a surplus power consumption heater 5 as surplus power consumption means for consuming surplus power of the fuel cell 3. The operation control device 6 as an operation control means for controlling the operation, a remote control type operation unit RC, and the like are provided.

  A plurality of manually operated individual circuit breakers CBI are connected in parallel to a commercial power supply line 7 to which power is supplied from the commercial power system 2, and the plurality of electric loads 1 are connected via the plurality of individual circuit breakers CBI. Is connected to the commercial power supply line 7.

  The inverter 4 is electrically connected to the commercial power supply line 7 via the generated power supply line 8, and the generated power of the fuel cell 3 is connected to the plurality of electric loads 1 via the inverter 4 and the generated power supply line 8. It is configured to supply.

  A system-side current transformer CT1 for detecting a current as power information corresponding to the power on the side of the commercial power system 2 from the connection point of the generated power supply line 8 in the commercial power supply line 7; A system-side circuit breaker MC1 is provided as a system-side circuit breaker that collectively disconnects the electrical connection between the fuel cell 3 and the plurality of electric loads 1, and a connection point of the generated power supply line 8 in the commercial power supply line 7 is provided. The common current transformer CT2 as the power information measuring means for detecting the current as the power information corresponding to the power, and the commercial power system 2 and the fuel cell 3 and the plurality of electrical loads 1 on the electric load 1 side. A manually operated main circuit breaker CBM is provided for intermittently connecting electrical connections.

The generated power supply line 8 is provided with a fuel cell side circuit breaker MC2 as a fuel cell side circuit breaker that collectively disconnects the electrical connection between the fuel cell 3 and the plurality of electric loads 1.
The surplus power consumption heater 5 is connected to a location between the fuel cell side circuit breaker MC2 and the inverter 4 in the generated power supply line 8 through a manually operated heater circuit breaker CBH.

  The operation control of the system side circuit breaker MC1 and the fuel cell side circuit breaker MC2 is performed by the operation control device 6.

  Further, in this power supply facility, when a power failure occurs in the commercial power system 2, the power failure detector PT that detects the power failure, and a fuel cell so that a reverse power flow to the commercial power system 2 does not occur. A reverse power flow prevention device 9 for adjusting the power consumption of the surplus power consumption heater 5 is provided so as to consume 3 surplus power.

  The reverse power flow prevention device 9 is connected to the commercial current transformer CT1 when the power failure is not generated in the commercial power system 2 and the system circuit breaker MC1 and the fuel cell circuit breaker MC2 are connected. The current flowing in the power supply line 7 is monitored, and the surplus power is surplus power so that the surplus power in the power generated by the fuel cell 3 is prevented from flowing back to the commercial power system 2. It is configured to be consumed by the consumption heater 5.

  Specifically, when there is no surplus power in the fuel cell 3, a current (hereinafter referred to as a positive direction current) from the commercial power system 2 is detected through the commercial power supply line 7 by the system-side current transformer CT1, and the fuel cell 3 When surplus power is generated in the current direction, no positive current value is detected by the system-side current transformer CT1. Therefore, when the forward current value detected by the grid-side current transformer CT1 tends to decrease, the reverse current prevention device 9 sets the forward current value to the set lower limit current value for preventing reverse power flow. The power consumption of the surplus power consumption heater 5 is adjusted.

  The amount of power that can be consumed by the surplus power consumption heater 5 is ideally equal to or greater than the maximum amount of power generated by the fuel cell 3, in which case the fuel cell 3 outputs the maximum amount of power generated, And even if it is a situation where all the electric power consumption of the some electric load 1 is zero, it can prevent a reverse power flow from generating.

Although not shown, a hot water storage tank is provided for storing hot water using heat generated from the fuel cell 3 and heat generated by the surplus power consumption heater 5.
Furthermore, a radiator fan 10 is provided to ventilate the radiator in order to dissipate the amount of heat generated from the surplus power consumption heater 5 with a radiator (not shown) when the amount of hot water stored in the hot water tank is full.

The electric load 1 is an electric device such as an electric lamp, an air conditioner, a refrigerator, a television, a personal computer, etc., and a plurality of individual circuit breakers CBI are connected to one electric load 1 or a plurality of electric loads. Some have 1 connected.
And it is comprised so that the electrical connection of the commercial electric power system 2 and the fuel cell 4, and the electric load 1 may be interrupted for every separate circuit breaker CBI.

  As the identification information for each of the plurality of electric loads 1, the operation unit RC is used as a manually operated identification information input means for inputting individual circuit breaker numbers assigned to the individual circuit breakers CBI. Numeric key switch 11, new input command switch 12 for instructing to input identification information for new input with the ten key switch 11, and input load for instructing input of load input switching scheduled identification information with the ten key switch 11 Switch 13 for switching command, full load cutoff state input switch 14 for inputting full load input stop state information, load power storage command switch 15 for instructing execution of individual load power storage mode, display 16 for displaying various information and various types A speaker 17 or the like for outputting information by voice is provided.

  One individual circuit breaker CBI that is desired to be turned on is selected from among the plurality of individual circuit breakers CBI that are to be turned on as the individual circuit breaker CBI that is to be turned on, and the individual circuit breaker of the selected individual circuit breaker CBI that is to be turned on is selected. The device number is input by the numeric keypad 11 in the state commanded by the new loading command switch 12 as the new loading schedule identification information.

  In addition, one of the plurality of individual circuit breakers CBI that is in the connected state is selected as one of the individual circuit breakers CBI scheduled to be cut off, and the state of the circuit breaker among the plurality of individual circuit breakers CBI is selected. One of the desired circuit breakers CBI is selected as the individual circuit breaker CBI scheduled to be inserted, and the individual circuit breaker number of the selected circuit breaker CBI selected and the individual circuit breaker number of the individual circuit breaker CBI to be loaded are selected. The input load switching schedule identification information is configured to be input by the numeric keypad 11 in a state instructed by the input load switching command switch 13.

  Further, by operating the full load cut-off state input switch 14, the full load input stop state information is inputted, and the user of the power supply equipment can turn on all of the plurality of individual breakers CBI. After switching to the cutoff state, the full load cutoff state input switch 14 is turned on.

  In addition, each time the operation of the load power storage command switch 15 is repeated, execution and termination of the individual load power storage mode are instructed alternately.

Hereinafter, the control operation of the operation control device 6 will be described.
The operation control device 6 is configured to be switchable to the individual load power storage mode, and in the individual load power storage mode, the identification information input by the numeric keypad 11 and the common current transformer CT2 as the power information measuring means are provided. The load current measured by the common current transformer CT2 is stored as load power based on the measurement information of the current load as load power of the electrical load corresponding to the identification information input by the numeric keypad 11. is there.

  Specifically, the user of the power supply facility selects any one individual circuit breaker CBI from among the plurality of individual circuit breakers CB1 in a state in which all of the plurality of individual circuit breakers CBI are in the cut-off state. Then, after inputting the individual circuit breaker number of the selected individual circuit breaker CBI with the numeric keypad 11, when the selected individual circuit breaker CBI is switched to the connected state, the current detected by the common current transformer CT2 at that time is used. The maximum load current obtained in this manner is stored in the operation control device 6 as the load power of the individual circuit breaker CBI corresponding to the individual circuit breaker number input by the numeric keypad 11.

Then, the user inputs the individual circuit breaker number by the ten-key switch 11 as described above and the individual circuit breaker CBI corresponding to the inputted individual circuit breaker number while the individual circuit breaker CBI that has been previously connected is turned off. Is repeatedly connected to the operation state, the load power is stored in the operation control device 6 in a state associated with each of the plurality of individual circuit breaker numbers.
Hereinafter, the load power storage information stored in the operation control device 6 in a state associated with each of the plurality of individual circuit breaker numbers may be referred to as load power storage information.

  The individual load power storage mode is executed in advance when the power supply facility is installed, for example.

When a power failure occurs in the commercial power system 2, the operation control device 6 is configured to execute the operation control during a power failure. Hereinafter, the operation control during a power failure will be described.
When the operation control device 6 recognizes that a power failure has occurred in the commercial power system 2 based on the detection information of the system power failure detector PT, the system side circuit breaker MC1 and the fuel cell side circuit breaker A shut-off process for switching MC2 to the shut-off state is executed.

  Further, the operation control device 6 is configured to adjust the generated power of the fuel cell 3 to the power corresponding to the currently requested load power in a normal time when no power failure occurs in the commercial power system 2, and After the shut-off process, a rated output process for adjusting the generated power of the fuel cell 3 to the rated power is performed in a state where the power consumption of the surplus power consumption heater 5 is adjusted so that the surplus power of the fuel cell 3 is consumed. It is comprised so that it may do.

  Specifically, the operation control device 6 sets the main output power following the currently requested load power and adjusts the generated power of the fuel cell 3 to the main output power in normal times. It is comprised so that it may do.

The rated output process will be described in detail. At the moment when the system circuit breaker MC1 and the fuel cell circuit breaker MC2 are switched to the cut-off state, the surplus power consumption heater 5 is the only electrical load for the fuel cell 3.
The operation control device 6 adjusts the power consumption of the surplus power consumption heater 5 while adjusting the power consumption of the surplus power consumption heater 5 so that the power consumption of the surplus power consumption heater 5 is balanced with the generated power of the fuel cell 3 in the rated output process. 3 is configured to increase and adjust the generated power to the rated power.
Incidentally, the rated power is set to the maximum generated power of the fuel cell 3 or slightly lower than that.

In addition, after the shut-off process, the operation control device 6 shuts off the fuel cell side when a condition that all of the plurality of electric loads 1 are in an input stop state in which power input from the fuel cell is cut off is satisfied. The connection process for switching the device MC2 to the connected state is executed.
That is, the operation control device 6 is based on the condition that all of the plurality of electric loads 1 are in an input stop state in which the power input from the fuel cell is cut off based on the full load cutoff state input switch 14 being turned on. Is determined to be satisfied.

  Further, after the execution of the connection process, the operation control device 6 includes the actual generated power of the fuel cell 3, the consumed power already consumed by any one of the plurality of electric loads 1 of the actual generated power, and Based on the load power for each of the plurality of electrical loads 1 stored in advance, the load power of the electrical load 1 corresponding to the identification information input by the numeric keypad 11 as the identification information input means is used as the generated power of the fuel cell 3. It is configured to determine whether or not the load can be covered and to execute a load application possibility determination process for outputting the determination result.

Specifically, since the connection between the electric load 1 and the fuel cell 3 is interrupted for each individual circuit breaker CBI, the execution of the individual load power storage mode described above is executed in advance for each of the plurality of individual circuit breakers CBI. The load power is stored.
Then, it is configured to determine whether or not the load power of the individual circuit breaker CBI corresponding to the individual circuit breaker number input by the numeric keypad 11 can be covered by the generated power of the fuel cell 3.

Note that, when a power failure occurs in the commercial power system 2, the rated output processing is executed as described above, so the actual generated power of the fuel cell 3 becomes the rated power.
In addition, the operation control device 6 uses the power consumption already consumed by any one of the plurality of electric loads 1 among the actual generated power of the fuel cell 3 (hereinafter, may be referred to as current power consumption), It is configured so as to be obtained based on the measurement information of the common current transformer CT2.

The current power consumption is preferably the maximum power among the power obtained based on the measurement information of the shared current transformer CT2 during a set time (for example, 5 minutes).
Further, the load power corresponding to the individual circuit breaker number determined to be able to cover the load power with the generated power of the fuel cell 3 in the load application possibility determination process is obtained from the load power storage information, and the load power (a plurality of load powers) In this case, the integrated power) may be used as the current power consumption.

Next, the control operation of the operation control device 6 in the individual load power storage mode will be described based on the flowchart shown in FIG.
The individual load power storage mode is executed based on a command from the load power storage command switch 15 of the operation unit RC.
That is, when the execution of the individual load power storage mode is instructed by the load power storage command switch 15 and the individual circuit breaker number is input by the numeric keypad 11, the maximum load current is calculated based on the measurement information of the common current transformer CT2. The obtained maximum load current is stored as the load power of the individual circuit breaker CBI corresponding to the individual circuit breaker number input by the numeric keypad 11, and this series of processing is performed by the load power storage command switch 15. The process is repeated each time an individual circuit breaker number is input with the numeric keypad 11 until the end of the individual load power storage mode is commanded (steps # 1 to # 5).
Therefore, load electric power is memorize | stored in the operation control apparatus 6 in the state matched with each of several individual circuit breaker CBI.

Next, based on the flowchart shown in FIG. 3, the control operation of the power failure operation control in the operation control device 6 will be described.
When recognizing that a power failure has occurred in the commercial power system 2 based on the detection information of the system power failure detector PT, a shut-off process for switching the system-side circuit breaker MC1 and the fuel cell-side circuit breaker MC2 to a shut-off state is executed. The power generation of the fuel cell 3 is adjusted to the rated power in a state where the power consumption of the surplus power consumption heater 5 is adjusted so as to avoid the single operation of the fuel cell 3 and then the surplus power of the fuel cell 3 is consumed. The rated output process is executed (steps # 11 to # 13).

  Subsequently, in step # 14, when it is recognized that the full load input stop state information is input by the full load cut state input switch 14, a connection process for switching the fuel cell side circuit breaker MC2 to the connected state is executed ( Step # 15).

  Subsequently, in step # 16, it is determined whether or not new input schedule identification information is input by the new input command switch 12 and the numeric keypad 11, and if it is determined that it has been input, it is input in step # 18. The load power Pp scheduled to be input corresponding to the individual circuit breaker number of the scheduled circuit breaker CBI is obtained from the load power storage information, and the current power consumption Pn is obtained based on the measurement information of the shared current transformer CT2 at the present time. It is determined whether or not the load power Pp scheduled to be input, the current power consumption Pn, and the rated power Po that is the actual generated power of the fuel cell 3 satisfy the following formula 1, and if satisfied, the input is scheduled It is determined that the load power of the electric load 1 (specifically, the electric load 1 connected to the individual circuit breaker CBI to be turned on) can be covered by the power generated by the fuel cell 3. And, when not satisfying formula 1 determined not be covered load power of the electric load 1 input scheduled at power generated by the fuel cell 3.

  Pp + Pn <Po ……………… (Formula 1)

  If it is determined in step # 16 that the new loading schedule identification information has not been input, it is determined in step # 17 whether the loading load switching schedule identification information has been input by the loading load switching command switch 13 and the numeric key switch 11. If it is determined that it has been input, in step # 18, the load power Pc scheduled to be cut off corresponding to the individual breaker number of the inputted individual breaker CBI that has been inputted, and the input individual breaker that has been scheduled to be turned on. The load power Pp scheduled to be input corresponding to the individual circuit breaker number of the CBI is obtained from the load power storage information, and the current power consumption Pn is obtained based on the measurement information of the shared current transformer CT2 at the present time. , The load power Pp to be input, the current power consumption Pn, and the rated power Po, which is the actual power generation of the fuel cell 3, It is determined whether or not the following expression 2 is satisfied, and if satisfied, the load power of the electric load 1 scheduled to be input (specifically, the electric load 1 connected to the individual circuit breaker CBI scheduled to be input) If the following formula 2 is not satisfied, it is determined that the load power of the electric load 1 scheduled to be supplied cannot be covered by the generated power of the fuel cell.

  Pp + Pn-Pc <Po (2)

If it is determined in step # 18 that the load power of the electric load 1 scheduled to be supplied can be covered by the power generated by the fuel cell 3, the message “Please input the load” is displayed on the display 16 and in step # 19. In step # 20, the current consumption power Pn is obtained based on the current measurement information of the shared current transformer CT2, and the surplus power is obtained by subtracting the obtained current consumption Pn from the rated power Po. Pr is determined, and it is determined whether or not the obtained surplus power Pr and the preset set power Ps satisfy the following Expression 3. If satisfied, it is determined that an additional load can be input. Then, it is determined that the additional load cannot be input, and the message “the load is maximum” is output to the display 16 and the speaker 17 (step # 2). ), At step # 23, based on the detection information of mains failure detector PT, a power failure in the commercial power system 2 recognizes that it has not recovered, the process returns to step # 16.
Incidentally, the set power Ps is set to, for example, about the minimum load power among the load powers of the plurality of individual circuit breakers CBI.

  Pr> Ps ............ (Formula 3)

  When it is determined in step # 18 that the load power of the electric load 1 to be supplied cannot be covered by the power generated by the fuel cell 3, “Please select another electric load because it exceeds the maximum load” Is output to the display 16 and the speaker 17, and when it is recognized in step # 23 that the power failure has not been recovered in the commercial power system 2 based on the detection information of the system power failure detector PT, the process returns to step # 16.

  In step # 23, upon recognizing that the power failure of the commercial power system 2 has been recovered based on the detection information of the system power failure detector PT, the process returns and an input prohibition time (for example, 5 minutes) of the agreement with the power company is returned. When the time has elapsed, the system side circuit breaker MC1 is switched to the connected state in synchronization with the commercial power system 2, and a message notifying that the power failure has been recovered is output to the display 16 and the speaker 17.

That is, when the user knows that the commercial power system 2 has failed, after switching all of the plurality of individual circuit breakers CBI to the cut-off state, the user turns on the full-load cut-off state input switch 14 to Enter the input stop status information.
Then, one individual circuit breaker CBI that is to be turned on and connected to the electrical load 1 to be turned on from a plurality of individual circuit breakers CBI is selected, the new turn-on command switch 12 is turned on, and the selected individual one to be turned on is selected. The individual circuit breaker number corresponding to the circuit breaker CBI is input by the ten key switch 11.

Then, it is determined whether or not the load power of the electric load 1 connected to the individual circuit breaker CBI to be charged can be covered by the generated power of the fuel cell 3, and when it can be covered, "Please load the load" Is output to the display 16 and the speaker 17, so that the selected individual circuit breaker CBI is switched to the connected state.
When the surplus power of the fuel cell 3 becomes lower than the set power by switching the individual circuit breaker CBI to the connected state, a message “Load is maximum” is output to the display 16 and the speaker 17. The user can recognize that the individual load circuit breaker CBI cannot be switched to the connected state.

In addition, when one of the already connected individual circuit breakers CBI is in the disconnected state and another individual circuit breaker CBI is in the connected state and the electric load 1 is to be turned on, the on load switching command switch 13 is turned on. In this state, the numeric keypad 11 is used to input the individual circuit breaker number of the scheduled circuit breaker CBI and the individual circuit breaker number of the scheduled circuit breaker CBI.
Then, instead of the individual breaker CBI scheduled to be shut off, it is determined whether or not the load power of the electric load 1 connected to the individual breaker CBI scheduled to be turned on can be covered by the generated power of the fuel cell 3. At that time, the message “Please load” is output to the display 16 and the speaker 17, so that the individual circuit breaker CBI scheduled to be shut off is switched to the shut-off state, and the individual circuit breaker CBI scheduled to be turned on is switched to the connected state. .

  Then, by switching the connected individual circuit breaker CBI, when the surplus power of the fuel cell 3 becomes lower than the set power, the message “Load is maximum” is output to the display 16 and the speaker 17. The user can recognize that the individual load breaker CBI cannot be switched to the connected state.

[Another embodiment]
Next, another embodiment will be described.
(A) In the first embodiment, the case where the operation of the plurality of individual circuit breakers CBI is configured to be performed manually is illustrated, but the operation of the plurality of individual circuit breakers CBI is controlled by the operation control device 6. You may comprise so that it may be performed.
In this case, the operation control device 6 is configured to execute connection processing for switching the fuel cell side circuit breaker MC2 to the connected state after switching all of the plurality of individual circuit breakers CBI to the disconnected state. That is, by switching all of the plurality of individual circuit breakers CBI to the cut-off state, the condition that all of the plurality of electric loads 1 are in the input stop state in which the power input from the fuel cell 3 is cut off is satisfied.
Further, when the operation control device 6 determines that the load power of the individual circuit breaker CBI scheduled to be turned on can be covered by the generated power of the fuel cell 3, the individual circuit breaker CBI scheduled to be turned on is switched to the connected state.

(B) In the first implementation embodiment described above, the maximum load the load power to be stored in association with each of the plurality of electrical loads 1 husband was determined on the basis of the detection information of the shared current transformer CT2 as power information measurement unit Although the case of using power is illustrated, the average load power obtained based on the detection information of the shared current transformer CT2 may be used.
As the power information measuring means, a power meter may be provided instead of the common current transformer CT2.

Load power to be stored in association with each of (c) a plurality of electrical loads 1, such as exemplified in the first implementation mode described above, when the load power obtained based on the detection information of the shared current transformer CT2 It is not limited.
For example, you may comprise so that the load electric power described in the specification etc. may be input artificially.
Further, if the electric load 1 has a communication function, the load power of the electric load 1 may be communicated to the operation control device 6.

Block diagram showing the overall configuration of the power supply equipment It shows a flow chart of a control operation of the power supply system according to a first implementation embodiment The figure which shows the flowchart of control operation | movement of the power supply equipment which concerns on 1st Embodiment .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric load 2 Electric power system 3 Fuel cell 5 Surplus power consumption means 6 Operation control means 7 Power supply line 11 Manual operation type identification information input means CT2 Power information measuring means MC1 System side cutoff means MC2 Fuel cell side cutoff means

Claims (4)

A fuel cell connected to a power system that supplies power to a plurality of electrical loads so as to supply power to the plurality of electrical loads; and
Surplus power consumption means for consuming surplus power of the fuel cell;
System-side blocking means for intermittently connecting the electric power system to the fuel cell and the plurality of electric loads;
A fuel cell side blocking means for intermittently connecting the fuel cell and the plurality of electric loads;
Operation control means for controlling operation is provided,
The operation control means is a power supply facility configured to execute a shut-off process for switching the system-side shut-off means and the fuel cell-side shut-off means to a shut-off state when an accident occurs in the power system. ,
Manual operation type identification information input means for inputting identification information about each of the plurality of electric loads is provided,
The operation control means is
After execution of the shut-off process, the actual generated power of the fuel cell, the power consumption already consumed by any of the plurality of electric loads of the actual generated power, and the plurality of electric loads stored in advance Based on the load power for each of the above, it is determined whether or not the load power of the electric load corresponding to the identification information input by the identification information input means can be covered by the generated power of the fuel cell. A power supply facility configured to execute a load application availability determination process for outputting a result. The operation control means is configured to adjust the generated power of the fuel cell to a power corresponding to the currently requested load power, and consumes surplus power of the fuel cell after the shut-off process. 2. The power supply according to claim 1, wherein a rated output process for adjusting the generated power of the fuel cell to a rated power or a substantially rated power is executed in a state in which the power consumption of the surplus power consuming means is adjusted. Facility. When the condition that the operation control means is in an input stop state in which all of the plurality of electric loads cut off the power input from the fuel cell after the shut-off process is satisfied, the fuel cell-side shut-off means is The power supply facility according to claim 1, wherein the power supply equipment is configured to execute a connection process for switching to a connection state . Power information measuring means for measuring power information corresponding to power is provided in a power supply line that supplies power to the plurality of electric loads from the power system or the fuel cell,
The operation control means is configured to be switchable to the individual load power storage mode,
In the individual load power storage mode, the load obtained from the power information measured by the power information measuring unit based on the identification information input by the identification information input unit and the measurement information of the power information measuring unit The power supply facility according to any one of claims 1 to 3 , configured to store electric power as load power of an electric load corresponding to identification information input by the identification information input means .

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