JP4270461B2 - Distributed power system controller and distributed power system network system - Google Patents

Description

  The present invention relates to a controller for a distributed power system and a network system for the distributed power system.

  The distributed power supply system has been developed for a centralized power supply system that generates a large amount of power at a time at a conventional power plant and transmits the power to a user, such as a home, building, or factory via an electric wire. This system distributes the power supply by providing a power supply (power generation device) smaller than that of the power plant, for example, near the user, for example, by installing it at the user's site. Is a system for generating and supplying each. Examples of the power source include a solar power generation device, a wind power generation device, a micro gas turbine power generation device, a gas engine power generation device, and a fuel cell power generation device.

  As a distributed power supply system, a system including a power generation device, a load device that operates with power supplied from the power generation device, and a detection unit that detects power consumption consumed by the load device is known. As such a control device, one that performs follow-up control for causing the output power of the power generation device to follow the power consumption detected by the detection means is known.

  An example of such a distributed power supply system is a fuel cell power generation system disclosed in Patent Document 1. As shown in Patent Document 1, the fuel cell power generation system 10 includes a fuel cell power generation device 12 including a fuel cell 36, an external load 26 that operates with power supplied from the power generation device 12, A power meter 110 that detects the power consumption consumed by the load 26 and a controller 100 that executes follow-up control for causing the output power of the fuel cell power generator 12 to follow the power consumption detected by the power meter 110 are provided. . The controller 100 stores a change pattern of set values corresponding to a change in power consumption of the external load 26 in the memory 106. The microcomputer 102 built in the controller 100 performs control so that the electric power generated by the fuel cell 36 becomes this set value. As a result, it is possible to generate power according to the power consumption of the external load, and to change the generated power according to the change in the power consumption of the external load.

There is also known a network system of a distributed power supply system in which a plurality of such distributed power supply systems are electrically connected to exchange power with each other. As an example of this network system, there is a home cogeneration network system disclosed in Patent Document 2. As shown in Patent Document 2, in a home cogeneration network system, home cogeneration devices 3 installed in a home 2 are connected by a power transmission line 6 to form a network. And the monitoring apparatus 7 which monitors the electric power load etc. of the home 2 ... in which the networked home cogeneration apparatus 3 ... was installed via the communication network 8 is provided, and a home is based on the electric power load of each home 2 ... The cogeneration apparatus 3 ... is arbitrarily selected and operated. And the generated electric power is supplied to the electric power load system of the other home 2 in which the household cogeneration apparatus 3 which is not operating is installed via the power transmission line 6.
JP 2002-93442 A (page 3-6, FIGS. 1-4) JP 2003-134664 A (page 5-9, FIG. 1-13)

  In the fuel cell power generation system described in Patent Document 1 described above, the generated power is changed according to the change in the power consumption of the external load. However, as shown in FIG. When the power consumption increases beyond the output response performance, the shortage of power P1 is compensated by receiving power from the system power supply (general power company power supply), so that the purchased power consumption increases. There was a problem. In addition, due to the output response performance of the fuel cell, the generated power begins to decrease with a delay from the steep fall of the power consumption, but the amount of decrease is more gradual than the power consumption, so it will generate extra power, and Since the excess power generation amount P2 is discarded, there is a problem that the efficiency of the fuel cell power generation system is poor.

  Further, in the home cogeneration network system described in Patent Document 2 described above, when the power consumption falls sharply before the generated power reaches the power consumption, power is supplied from another home cogeneration apparatus 3. However, the amount of power to be purchased can be reduced, but the number of household cogeneration devices 3 that generate extra power increases. As the amount increases, there is a problem that the efficiency becomes worse.

  The present invention has been made to solve the above-described problems, and can the generated power of the power generator follow the power consumption that suddenly rises and falls within a predetermined short time exceeding the output response performance of the power generator? By determining whether or not and causing the power generation device to perform power generation according to the determination result, a highly efficient power generation and environmentally friendly distributed power system controller and a distributed power system network system are provided. For the purpose.

In order to solve the above-described problem, the structural features of the invention according to claim 1 are a power generation device, a load device that operates with power supplied from the power generation device, and power consumption consumed by the load device. A control device for a distributed power system comprising a detecting means for detecting the power supply, wherein the tracking power control is performed to follow the output power of the power generator with respect to the power consumption detected by the detecting means. Whether the control device permits the execution of the follow-up control by determining whether the power consumption detected by the detection means exceeds the output response performance of the power generation device and rises and falls sharply within a predetermined short time. It comprises determining tracking control determination means whether, following control determination means, matching degree calculation means for calculating the degree of coincidence between the reference model based on the power consumption detected by the detection means And a comparing means for comparing the degree of coincidence calculated by the degree of coincidence calculating means with a predetermined value. When the degree of coincidence is less than the predetermined value, it is determined that execution of the follow-up control is not permitted, and the degree of coincidence is predetermined. If the value is equal to or greater than the value, it is determined that the execution of the follow-up control is permitted, and the control device restricts the execution of the follow-up control when the follow-up control determination unit determines that the execution of the follow-up control is not permitted. In this case, follow-up control is executed.

According to a second aspect of the present invention, there is provided a power generation device, a load device that operates with power supplied from the power generation device, and a detection unit that detects power consumption consumed by the load device. A plurality of distributed power supply systems that perform follow-up control for following the output power of the power generation device with respect to the power consumption detected by the detection means, and are connected to each other to provide power interchange that allows power to be interchanged. In the network system of the distributed power system to be executed, the power consumption detected by the detection means exceeds the output response performance of the power generation device and determines whether it suddenly rises and falls within a predetermined short time. Follow-up control determination means for determining whether or not to allow execution of control, and the power consumption detected by the detection means exceeds the output response performance of the power generation device to a predetermined level. It is determined that the power interchange determining means for determining whether or not to permit the execution of power interchange and the follow-up control determining means do not permit the execution of the follow-up control by determining whether or not the sudden rise and fall in time. If this is the case, the follow-up control means for controlling the execution of the follow-up control and the follow-up control means for executing the follow-up control otherwise, and the power interchange determining means determines that the power interchange determination is not permitted. It is provided with a power accommodation control means for restricting execution of accommodation and controlling so as to execute electricity accommodation otherwise.

In the control apparatus for a distributed power system according to the first aspect of the present invention configured as described above, the follow-up control determination means has a predetermined power consumption detected by the detection means exceeding the output response performance of the power generation apparatus. When it is determined whether or not the execution of the follow-up control is permitted by determining whether or not it suddenly rises and falls within a short time, and this follow-up control determination means determines that the execution of the follow-up control is not permitted Restricts the execution of the follow-up control, and otherwise executes the follow-up control. Therefore, when the power consumption of the load device fluctuates within the output response performance of the power generation device, the control device determines that the execution of the tracking control is permitted and executes the tracking control, while the power consumption of the load device is When the output response performance exceeds the output response performance and suddenly rises and falls within a predetermined short time, the control device determines that the execution of the follow-up control is not permitted and restricts the execution of the follow-up control. As a result, it is determined whether or not the generated power of the power generator can follow the power consumption that suddenly rises and falls within a predetermined short time exceeding the output response performance of the power generator, and the power generation control according to the determination result is performed. By causing the power generation device to execute, a control device for a distributed power supply system that is highly efficient power generation and friendly to the environment is provided.
Further, the coincidence calculation means calculates the coincidence with the reference model based on the power consumption detected by the detection means, the comparison means compares the coincidence calculated by the coincidence calculation means with a predetermined value, The follow-up control determination unit determines that execution of the follow-up control is not permitted when the degree of coincidence is less than a predetermined value, and determines that execution of the follow-up control is permitted when the degree of coincidence is equal to or greater than a predetermined value. Thereby, the determination mentioned above can be performed reliably and accurately.

In the network system of the distributed power supply system of the present invention according to claim 2 configured as described above, the follow-up control determining means has a predetermined power consumption detected by the detecting means exceeding the output response performance of the power generator. It is determined whether or not the execution of the follow-up control is permitted by determining whether or not the rise and fall is abrupt within a short time, and the power interchange determination unit determines whether the power consumption detected by the detection unit It is determined whether or not the execution of power interchange is permitted by determining whether or not it rapidly rises and falls within a predetermined short time exceeding the output response performance. If it is determined that the execution of the follow-up control is not permitted, the execution of the follow-up control is restricted, and if not, the follow-up control is executed. If the constant unit determines not to permit the execution of the power interchange will regulate the execution of the power interchange, otherwise it performs control to execute the power interchange. Therefore, when the power consumption of the load device fluctuates within the output response performance of the power generation device, it is determined that the execution of the follow-up control is permitted by each control means, the follow-up control is executed, and the execution of the power interchange is allowed. If the power consumption of the load device exceeds the output response performance of the power generation device and suddenly rises and falls within a predetermined short time, the control unit does not allow execution of follow-up control. And the execution of the follow-up control is restricted, and the execution of the power accommodation is regulated by judging that the execution of the electricity accommodation is not permitted. As a result, it is determined whether or not the generated power of the power generator can follow the power consumption that suddenly rises and falls within a predetermined short time exceeding the output response performance of the power generator, and the power generation control according to the determination result is generated. It is possible to provide a network system of a distributed power supply system that is highly efficient and environmentally friendly by determining whether or not the apparatus can execute power while allowing the apparatus to perform power accommodation according to the determination result.

  Hereinafter, an embodiment of a distributed power supply system to which a control device for a distributed power supply system according to the present invention is applied will be described. FIG. 1 is a schematic diagram showing an overview of this distributed power supply system. This distributed power supply system includes a power generation device 10, a load device 21 that operates with power supplied from the power generation device 10, and a wattmeter 22 that is detection means for detecting power consumption consumed by the load device 21. And an operation control device 30 that is a control device that performs follow-up control for causing the output power of the power generation device 10 to follow the power consumption detected by the wattmeter 22.

  The power generation device 10 is a fuel cell power generation device, and includes a power generator 11 that generates DC power, and a converter (for example, an inverter) 12 that converts the DC power supplied from the power generator 11 into AC power and outputs the AC power. ing.

  The generator 11 includes a reformer, a carbon monoxide reduction device (hereinafter referred to as a CO reduction device), and a fuel cell. In the reformer, the fuel supplied from the fuel supply device 13 is steam-reformed with water supplied from the water supply device 14 to generate a hydrogen-rich reformed gas, which is led to the CO reduction device. The CO reduction device reduces carbon monoxide contained in the reformed gas and leads it to the fuel cell. The fuel cell generates power using hydrogen in the reformed gas supplied to the fuel electrode and air that is an oxidant gas supplied to the air electrode.

  The converter 12 is connected to each of a plurality of load devices 21 installed at a power usage place 20 that is a user via a power transmission line 15, and the AC power output from the converter 12 is as necessary. It is supplied to each load device 21. The load device 21 is an electric appliance such as an electric lamp, an iron, a TV, and a washing machine, and is an electric appliance that temporarily increases power consumption such as a dryer and a microwave oven. Automatic electric kotatsu, electric carpet, air conditioner, refrigerator, etc. In addition, an electric appliance that is turned on and off is included. In addition, the power source 15 of the power company is also connected to the transmission line 15 that connects the converter 12 and the power usage place 20, and when the total power consumption of the load device 21 exceeds the power generation amount of the power generation device 10, The insufficient power is supplemented by purchased power received (purchased) from the system power supply 16. The wattmeter 22 detects the total power consumption of all the load devices 21 used in the power usage place 20.

  The operation control device 30 uses a memory 31 that is storage means for inputting and storing data of power consumption of the load device 21 detected by the power meter 22, and data of power consumption stored in the memory 31. It is determined whether or not the execution of the tracking control is permitted, and the tracking control determination unit 32 that is a tracking control determination unit that outputs the determination result to the power generation amount instruction value calculation unit 33 and the power consumption stored in the memory 31 And a power generation amount instruction value calculation unit 33 that calculates a power generation amount instruction value based on the determination result input from the follow-up control determination unit 32 and instructs the generator 11 to transmit it.

  The follow-up control determination unit 32 determines whether the power consumption detected by the wattmeter 22 exceeds the output response performance of the power generation apparatus 10 and suddenly rises and falls within a predetermined short time. It is determined whether or not execution is permitted.

  The power generation amount instruction value calculation unit 33 sets the power generation amount instruction value so that the determination result input from the follow-up control determination unit 32 is the power consumption data input from the memory 31 if the execution result of the follow-up control is permitted. If the determination result does not permit the execution of the follow-up control, the power generation amount instruction value is calculated so that the predetermined power generation amount is obtained regardless of the power consumption data input from the memory 31. The power generation amount instruction value defines the amount of hydrogen gas in the reformed gas supplied to the fuel cell, that is, the amount of fuel and reformed water supplied to the reformer. The predetermined power generation amount is preferably determined based on the power consumption immediately before the start-up when the power consumption exceeds the output response performance of the power generation apparatus 10 and rapidly rises and falls within a predetermined short time. For example, the power consumption may be the same as or close to the previous power consumption.

  The operation control device 30 has a microcomputer (not shown), and the microcomputer includes an input / output interface, a CPU, a RAM, and a ROM (all not shown) connected via a bus. The CPU executes a program corresponding to the flowchart of FIG. 2, inputs the power consumption detected by the power meter 22, and controls the power generation amount (output power) of the power generation device based on the power consumption. The RAM temporarily stores variables necessary for executing the program, and the ROM stores the program.

  The distributed power supply system includes a hot water storage tank 17 attached to the power generation apparatus 10, and the hot water storage tank 17 converts the water supplied from the water supply apparatus 14 into exhaust heat of the generator 11 (for example, exhaust from the fuel cell). The hot water is stored using the heat, and the hot water is supplied to the hot water use place 18 as necessary.

  Next, the operation of the above-described distributed power supply system will be described with reference to FIG. The operation control device 30 executes the program shown in FIG. 2 every predetermined short time (for example, 60 seconds) when the power generator 11 is in a state capable of generating power. The operation control device 30 measures the power consumption of the power usage place 20 using the wattmeter 22 (step 102), and stores the measured power consumption in the memory 31 (step 104).

  Then, the follow-up control determination unit 32 calculates the degree of coincidence with the reference model based on the power consumption data stored in the memory 31 (step 106 which is a coincidence degree calculating unit), and is calculated by the coincidence degree calculating unit. The degree of coincidence and the predetermined value C are compared (step 108 as comparison means). At this time, if the degree of coincidence is equal to or greater than the predetermined value C, it is determined as “YES”, it is determined that the execution of the follow-up control is permitted, and the follow-up permission signal is set to 1 (step 110). If it is less than “NO”, it is determined as “NO”, it is determined that the execution of the tracking control is not permitted, and the tracking permission signal is set to 0 (step 112). The follow-up control is control for causing the output power of the power generation apparatus 10 to follow the power consumption so as to be the same. The degree of coincidence with the reference model is a value indicating that the larger the value is, the more consistent with the reference model, and the smaller the value is, the less coincident is.

Specifically, in step 106, the following numbers are based on the current data and the past several data (four in the present embodiment) stored in the memory 31 or the latest predetermined time data. The average power consumption value σ [k] is calculated by 1 and the degree of coincidence P [k] with the reference model is calculated by the following equation 2 from the average power consumption value σ [k] and the current input u [k]. To do.

  Note that u [k] is current data, for example, input data at time k, and z is a delay operator.

  The reference model is a model used as a reference for measuring the increase / decrease in power consumption and the degree of increase / decrease. In this embodiment, a power distribution model represented by an exponential distribution is adopted.

  As shown in FIG. 3, in the areas A1 and A2, when the power consumption temporarily increases rapidly exceeding the output response performance of the power generation device 10, for example, a dryer, a microwave oven, an electric kotatsu, an electric carpet, an air conditioner, When the electric appliance that is automatically turned on / off, such as a refrigerator, is an external load and the electric appliance is turned on only for a short time, the above-described processing of step 106 is performed. When the degree of coincidence is calculated, a graph as shown in FIG. 4 is obtained. As is clear from FIG. 4, the degree of coincidence with the reference model is small in the regions A1 and A2, and thus, the power consumption deviates from the reference model, that is, exceeds the output response performance of the power generation apparatus 10. This shows that the power consumption is temporarily increasing rapidly. Therefore, by comparing the degree of coincidence with the predetermined value C, it is reliably and accurately determined that the areas A1 and A2 exceed the output response performance of the power generation apparatus 10 and the power consumption temporarily increases rapidly. can do.

  When the operation control device 30 processes the degree of coincidence shown in FIG. 4 in steps 108, 110, and 112, if the degree of coincidence is equal to or greater than the predetermined value C, the follow permission signal is set to 1, and the degree of coincidence is equal to the predetermined value C. If it is less than 0, by setting the tracking permission signal to 0, the graph showing the relationship between the tracking permission signal and time becomes a graph as shown in FIG. As is apparent from FIG. 5, the follow-up permission signal is 0 in the areas A1 and A2.

  Then, when the follow permission signal is 1, the operation control device 30 performs the follow control (steps 114 and 116), and when the follow permission signal is 0, the operation control device 30 restricts the execution of the follow control ( Step 114, 118). Specifically, in the power generation amount instruction value calculation unit 33 of the operation control device 30, when the power generation amount is power consumption that can follow, the determination result input from the tracking control determination unit 32 permits execution of tracking control. Therefore, the power generation amount instruction value is calculated so as to be the power consumption data input from the memory 31, and the calculation result is transmitted to the power generator 11. Thereby, the power generator 11 is controlled to supply the fuel amount and the reforming water amount to the reforming device in accordance with the power generation amount instruction value and output the power generation amount following the power consumption (step 116).

  On the other hand, when the power consumption temporarily increases rapidly exceeding the output response performance of the power generator 10 as in the areas A1 and A2, the determination result input from the tracking control determination unit 32 is the execution of the tracking control. Therefore, the power generation amount instruction value is calculated so that the predetermined power generation amount is obtained regardless of the power consumption data input from the memory 31, and the calculation result is transmitted to the power generator 11. Thereby, the power generator 11 is controlled to supply the fuel amount and the reforming water amount to the reforming device in accordance with the power generation amount instruction value, and to output the power generation amount that does not follow the power consumption (step 118). At this time, the power generation amount of the power generator 11 is insufficient with respect to the power consumption that temporarily increases rapidly, but the shortage is compensated by the purchased power.

  Therefore, as shown in FIG. 6, the power generation amount according to the present invention is controlled as shown by the thick solid line in FIG. 6 with respect to the power consumption indicated by the thin solid line. As is clear from FIG. 6, in regions A1 and A2 where the power consumption exceeds the output response performance of the power generation apparatus 10 and temporarily increases rapidly, the power generation amount does not follow the power consumption, and in particular, the region A1. However, no power is generated by tracking control. Also in the area A2, some power generation is performed by the follow-up control in the latter half, but the start is delayed and the amount of power generation is suppressed as compared with the conventional one shown in FIG. In FIG. 7, the power generation amount according to the related art is shown with respect to the power consumption. The power consumption is indicated by a thin solid line, and the power generation amount is indicated by a thick solid line. As is clear from FIG. 7, power generation by follow-up control is performed in the regions A1 and A2.

  Therefore, according to the present invention, when the power consumption temporarily increases rapidly exceeding the output response performance of the power generation apparatus 10, the power generation by the follow-up control is restricted, so that the power consumption that temporarily increases suddenly increases. Since the surplus power amount of the generator 11 generated when going down can be suppressed to a low level, the power generated by the generator 11 can be used without waste, achieving high efficiency power generation, and generating power wastefully. It becomes possible to prevent the generation of useless carbon dioxide.

  As is clear from the above description, in the present embodiment, the follow-up control determination unit 32 causes the power consumption detected by the wattmeter 22 to rapidly exceed the output response performance of the power generation apparatus 10 within a predetermined short time. It is determined whether or not the execution of the follow-up control is permitted by determining whether or not the vehicle rises and falls, and the operation control device 30 determines that the follow-up control determination unit 32 does not permit the execution of the follow-up control. In such a case, the execution of the follow-up control is restricted (steps 114 and 118), and if not, the follow-up control is executed (steps 114 and 116). Therefore, when the power consumption of the load device 21 fluctuates within the output response performance of the power generation device 10, the operation control device 30 determines that the execution of the follow-up control is permitted and executes the follow-up control. When the power consumption exceeds the output response performance of the power generation device 10 and suddenly rises and falls within a predetermined short time, the operation control device 30 determines that the execution of the tracking control is not permitted and restricts the execution of the tracking control. To do. Thereby, it is determined whether or not the generated power of the power generation device 10 can follow the power consumption that suddenly rises and falls within a predetermined short time exceeding the output response performance of the power generation device 10, and the power generation according to the determination result By causing the power generation device to perform control, a control device for a distributed power supply system that is highly efficient power generation and friendly to the environment is provided.

  Further, step 106 (matching degree calculating means) calculates the matching degree with the reference model based on the power consumption detected by the wattmeter 22, and step 108 (comparing means) matches the degree of matching calculated by step 106. Are compared with the predetermined value C, and the steps 106 to 112 (follow-up control determining means) determine that the execution of the follow-up control is not permitted when the coincidence is less than the predetermined value C, and the coincidence is equal to or greater than the predetermined value C. If it is, it is determined that execution of the follow-up control is permitted. Thereby, the determination mentioned above can be performed reliably and accurately.

  Next, an embodiment of a network system for a distributed power supply system according to the present invention will be described. FIG. 8 is a schematic diagram showing an overview of the network system of this distributed power supply system. In this network system, a plurality of (two in the present embodiment) distributed power supply systems described above are electrically connected, and power interchange is performed to allow mutual power interchange. In FIG. 8, only the power generation device 10, the power usage place 20, and the wattmeter 22 are shown in the distributed power supply system for the sake of simplicity of explanation. Each power generation apparatus 10 supplies power generation directly to a pair of power use places 20 and supplies surplus power to other power use places 20 via a switch 19 of another distributed power supply system. . As a result, power is supplied to the power usage place 20 from the power generation device 10 as a pair, but when the supply power is insufficient with respect to the power consumption, the surplus power is first compensated from the other power generation devices 10. If the power supply is still insufficient, the purchased power is compensated from the system power supply 16.

  The switch 19 includes a first state (shown state) in which the electric wire 19a to which surplus power from each power generation device 10 is transmitted and the power use place 20 are connected, and a second state in which the electric wire 19a and the power use place 20 are not connected. The state where the use place 20 is grounded is switched according to the determination result input from the power interchange determination unit 42 described later. Specifically, the switch 19 enters the first state when the interchange permission signal: 1 is input from the power interchange determining unit 42, and the power usage place 20 takes in the surplus power of the other power generator 10, while the power interchange determining unit 42. When the interchange permission signal: 0 is input, the second state is entered, and the power usage place 20 is restricted from taking in surplus power of other power generation devices 10.

  The network system of the distributed power supply system includes an operation control device 40 that manages and controls the network system in an integrated manner. The operation control device 40 includes a memory 41 that is storage means for inputting and storing each data of power consumption of the load device 21 detected by each wattmeter 22, and data of power consumption stored in the memory 41. Is used to determine whether or not to permit the execution of power accommodation, and the determination result is output to the power generation amount instruction value calculation unit 43. A power generation amount instruction value calculation unit 43 that calculates each power generation amount instruction value to the power generation apparatus 10 based on the power consumption data being received and the determination result input from the power interchange determination unit 42 and instructs transmission thereof. .

  The power interchange determination unit 42 determines whether the power consumption detected by the wattmeter 22 exceeds the output response performance of the power generation apparatus 10 and rises and falls sharply within a predetermined short time in the same manner as the follow-up control determination unit 32 described above. By determining whether or not to permit execution of power interchange.

  The power generation amount instruction value calculation unit 43 indicates the status of the interchange permission signal for the switch 19 that is a pair of the power usage location 20, the power generation amount of the power generation apparatus 10 that is the pair of the power usage location 20, and the power usage location The power generation amount instruction value of each power generation device 10 is calculated in consideration of the power consumption of 20 and the surplus power of other power generation devices 10.

  The operation control device 40 has a microcomputer (not shown), and the microcomputer includes an input / output interface, a CPU, a RAM, and a ROM (all not shown) connected via a bus. The CPU executes a program corresponding to the flowchart of FIG. 9, inputs the power consumption detected by the power meter 22, and controls the power generation amount (output power) and power interchange of the power generation device based on the power consumption. ing. The RAM temporarily stores variables necessary for executing the program, and the ROM stores the program.

  Next, the operation of the network system of the distributed power supply system described above will be described with reference to FIG. The operation control device 40 executes the program shown in FIG. 9 every predetermined short time (for example, 60 seconds) when each power generation device 10 is in a state capable of generating power. The operation control device 40 uses the wattmeter 22 to measure each power consumption at the power usage place 20 (step 102), and stores the measured power consumption in the memory 31 for each power usage place 20 (step 104).

  Then, the power interchange determining unit 42 calculates the degree of coincidence with the reference model based on the power consumption data stored in the memory 41 (step 106 which is a degree of coincidence calculating unit), and is calculated by the degree of coincidence calculating unit. The degree of coincidence and the predetermined value C are compared (step 108 as comparison means). At this time, if the degree of coincidence is equal to or greater than a predetermined value C, it is determined as “YES”, it is determined that execution of power accommodation is permitted, and the accommodation permission signal is set to 1 (step 202). If it is less than “NO”, it is determined as “NO”, it is determined that execution of power accommodation is not permitted, and the accommodation permission signal is set to 0 (step 204). Then, the operation control device 40 executes power accommodation when the accommodation permission signal is 1 (steps 206 and 208), and restricts execution of power accommodation when the accommodation permission signal is 0 (steps 206 and 208). Steps 206 and 210).

  Therefore, according to the present embodiment, the follow-up control determination unit (follow-up control determination unit) 32 causes the power consumption detected by the wattmeter 22 to exceed the output response performance of the power generation apparatus 10 within a predetermined short time. It is determined whether or not the execution of the follow-up control is permitted by determining whether or not the power consumption rises and falls, and the power interchange determination unit (power interchange determination unit) 42 determines whether the power consumption detected by the wattmeter 22 is the power consumption. A step which is a follow-up control means, which determines whether or not to permit the execution of power interchange by determining whether or not the output response performance of the power generation apparatus 10 is exceeded and suddenly rises and falls within a predetermined short time. 114 to 118 restrict the execution of the follow-up control when the follow-up control determining means 32 determines that the execution of the follow-up control is not permitted (steps 114 and 118). Are executed (steps 114 and 116), and if the power interchange control means steps 206 to 210 determine that the power accommodation determination means 42 does not permit execution of the power accommodation, the power accommodation execution is performed. Control is performed (steps 206 and 210), and if not, control is performed to execute power interchange (steps 206 and 208). Therefore, when the power consumption of the power usage place 20 (load device 21) fluctuates within the output response performance of the power generation device 10, it is determined that the execution of the follow-up control is permitted by each control means and the follow-up control is executed. It is determined that the execution of the power accommodation is permitted, and the power accommodation is executed. On the other hand, the power consumption at the power use place 20 (load device 21) exceeds the output response performance of the power generation device and rises and falls rapidly within a predetermined short time. In this case, it is determined that the execution of the follow-up control is not permitted by each control means, and the execution of the follow-up control is restricted, and the execution of the power interchange is restricted by determining that the execution of the power interchange is not permitted.

  For example, in one power usage place 20 of the present embodiment, the power consumption exceeds the output response performance of the power generator and rises and falls sharply within a predetermined short time, and such power consumption in the other power usage place 20 Otherwise, one switch 19 is switched to the second state to restrict power interchange to one power usage place 20 and one power generation apparatus 10 is restricted from performing follow-up control. However, when the follow-up control cannot be completely eliminated as in the above-described region A2, and surplus power is generated at the time of the fall, the surplus power can be supplied to the other power use place 20.

  Therefore, it is determined whether or not the generated power of the power generator 10 can follow the power consumption that rapidly rises and falls within a predetermined short time exceeding the output response performance of the power generator 10, and the power generation control according to the determination result is performed. Providing a network system of a distributed power supply system that is highly efficient in power generation and is environmentally friendly by determining whether power generation is possible while allowing the power generation apparatus to execute and power interchange according to the determination result. it can.

  In the network system of the distributed power system described above, the follow-up control determining means is provided in the operation control apparatus 30 of the power generation apparatus 10 and the power interchange determining means is provided in the operation control apparatus 40 of the network system. The determination unit may be provided in the operation control device 30 of the power generation apparatus 10 or the operation control device 40 of the network system.

  Alternatively, the operation control device 40 of the network system may be provided without providing the operation control device 40 of the network system. In this case, it is desirable to perform mutual communication of data between the operation control devices 30. In addition, the operation control device 40 of the network system may be provided with the follow-up control determination function of the operation control device 30 of the power generation device 10.

  In each of the above-described embodiments, the fuel cell power generation device is employed as the power generation device 10, but instead, a solar power generation device, a wind power generation device, a micro gas turbine power generation device, a gas engine power generation device, or the like is used. You may make it employ | adopt.

  Further, as the power generation device 10, there is a power generation device 11 in which the power generator 11 generates AC power and directly outputs it without going through the exchanger 12.

  In each of the determination means described above, the degree of coincidence with the reference model is calculated from the detected power consumption, and based on the degree of coincidence, the power consumption exceeds the output response performance of the power generation device within a predetermined short time. Although it has been determined whether or not it suddenly rises and falls, instead of this, a differential value may be calculated from the detected power consumption and determined based on the differential value.

1 is a schematic diagram showing an outline of an embodiment of a distributed power supply system to which a control device for a distributed power supply system according to the present invention is applied. It is a flowchart of the control program performed with the operation control apparatus shown in FIG. It is a graph which shows the power consumption including temporarily large consumption processed by this invention. It is a graph which shows the coincidence degree with respect to the reference | standard model of the power consumption shown in FIG. It is a graph which shows a follow permission signal. It is a graph which shows the power consumption processed by this invention, and the electric power generation amount by this invention. It is a graph which shows the power consumption processed by this invention, and the electric power generation amount by a prior art. 1 is a schematic diagram showing an outline of an embodiment of a network system of a distributed power supply system according to the present invention. It is a flowchart of the control program performed with the operation control apparatus shown in FIG. It is a figure which shows the relationship between the power consumption at the time of performing the follow-up control by a prior art, and output power.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Power generation device, 11 ... Generator, 12 ... Converter, 13 ... Fuel supply device, 14 ... Water supply device, 15 ... Power transmission line, 16 ... System power supply, 17 ... Hot water tank, 18 ... Hot water use place, 19 ... Switch ... 20 ... Electricity use place, 21 ... Load device, 22 ... Wattmeter, 30 ... Operation control device, 31 ... Memory, 32 ... Follow-up control determination unit, 33 ... Power generation amount instruction value calculation unit, 40 ... Operation control device, 41 ... Memory, 42 ... Power interchangeability determination unit, 43 ... Power generation amount instruction value calculation unit.

Claims (2)

A control device for a distributed power system comprising: a power generation device; a load device that operates with power supplied from the power generation device; and a detection unit that detects power consumption consumed by the load device,
In a control device for a distributed power supply system that performs follow-up control for causing the output power of the power generator to follow the power consumption detected by the detection means,
Whether or not to allow execution of the follow-up control by determining whether or not the power consumption detected by the detection means exceeds the output response performance of the power generator and suddenly rises and falls within a predetermined short time. Tracking control determination means for determining whether
The follow-up control determination means includes
A degree of coincidence calculating means for calculating a degree of coincidence with a reference model based on the power consumption detected by the detecting means;
Comparing means for comparing the degree of coincidence calculated by the degree of coincidence calculating means with a predetermined value,
When the degree of coincidence is less than a predetermined value, it is determined that execution of the follow-up control is not permitted, and when the degree of coincidence is equal to or greater than a predetermined value, it is determined that execution of the follow-up control is permitted,
The control device restricts execution of the follow-up control when the follow-up control determination unit determines that execution of the follow-up control is not permitted, and executes the follow-up control otherwise. Control device for distributed power system. A power generation device; a load device that operates with power supplied from the power generation device; and a detection unit that detects power consumption consumed by the load device, the power consumption detected by the detection unit being In the network system of the distributed power system in which a plurality of distributed power systems that perform follow-up control for tracking the output power of the power generation apparatus are electrically connected to each other and perform power accommodation to accommodate power to each other.
  Whether or not to allow execution of the follow-up control by determining whether or not the power consumption detected by the detection means exceeds the output response performance of the power generator and suddenly rises and falls within a predetermined short time. Tracking control determining means for determining whether or not
  Whether to permit execution of the power interchange by determining whether or not the power consumption detected by the detection means exceeds the output response performance of the power generator and suddenly rises and falls within the predetermined short time Power interchange determination means for determining whether or not,
  If the tracking control determination means determines not to allow execution of the tracking control, the tracking control means controls the execution of the tracking control, and otherwise controls to execute the tracking control;
  Power accommodation control means for restricting execution of the power accommodation when the power accommodation determining means determines not to permit execution of the power accommodation; otherwise, performing power accommodation control means for controlling the power accommodation. A network system of a distributed power supply system characterized by comprising:

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