JP2006204081A - Supply and demand adjusting method, system and service by distributed power source - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a system by which natural fluctuating electric power supply like wind power generation is interconnected to a commercial system, and economical operation is attained, without depending on the ability to adjust the supply and demand of an electric power company. <P>SOLUTION: The system includes a means 62 to collect information on demand of a customer 6, and a means 42 to collect information on generated energy (output) of an electric power enterprise having the natural fluctuating electric power supply 4, and the information is collected at a supply and demand adjusting center 3 via a communications network 2. A monitor controller 31 computes and sets an output of a power system 5 for adjustment from such information so as to keep the balance of demand and supply, including the naturally fluctuating electric power supply 4. Its control value is transmitted to the power system 5 for adjustment via the communication network 2, and the generated energy is controlled by a control unit 53. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supply and demand adjustment method, system, and service using a distributed power source, and more particularly, a supply and demand adjustment method and system using a distributed power source suitable for supplying power to demand by a distributed power source including a natural energy power source. And services.

Due to growing interest in the global environment, such as reducing CO ₂ emissions, the introduction of distributed power sources such as wind power generation and solar power generation is desired. In particular, wind power generation with relatively large capacity is expected as an environmentally friendly energy source. Also, since April 2003, the RPS Act (Special Measures Law on the Use of New Energy by Electric Power Companies) has been enforced, and the environment for introducing new energy has been improved in terms of policy.

  However, it is known that the power generation output of wind power generation changes depending on the strength of the wind, and the power generation output of solar power generation changes greatly due to the movement of clouds. A power generation device whose power generation output fluctuates depending on natural conditions, such as wind power generation or solar power generation, may be referred to as a natural power supply.

  When a natural variable power supply is connected to the grid, it is necessary to perform supply and demand adjustment and system voltage management including the natural variable power supply, and there is a concern about the influence on the grid. As described in Non-Patent Document 1, the use of secondary batteries, flywheels, capacitors, etc. has been studied for power stabilization (compensating for power generation output fluctuations) when a naturally varying power supply is connected to the system. Yes.

  In addition, Patent Document 1 devises a method for actively using a natural power source (natural energy power source) to supply power to consumers, and responds to fluctuations in demand and output fluctuations of the natural power source. Thus, there has been proposed a power supply system that determines the amount of power purchased from a power generator (electric power company) using weather forecast information.

  In addition, a company that can supply power from a distributed power source, called a specific-scale electric power company, transmits power to consumers who have contracted in advance via a transmission and distribution system owned by a general electric power company (electric power company). It has also been done. In this case, a general electric power company provides a connection supply service to a business having a distributed power source in accordance with the connection supply provisions.

JP 2002-262458 A "Proposal for promoting the introduction of wind power generation systems" (New Energy Foundation, New Energy Conference, 2002)

  For example, in wind power generation, the power generation output varies depending on the strength of the wind. In order to balance supply and demand, it is necessary to secure a controllable power source for fluctuations in output of wind power generation, in which output control is hardly possible, in addition to fluctuations in demand. An electric power company makes a bid for a power generation company and decides a purchase amount in advance. A power supply that can control the power generation output of the electric power company is prepared for fluctuations caused by the purchase amount, and final supply and demand adjustment (frequency adjustment) is performed.

  In order to greatly increase the capacity of wind power generation connected to the grid, it is necessary to maintain the adjustment capability of supply and demand adjustment (frequency adjustment), and in the current form, it is necessary to increase the adjustment facilities of the electric power company However, there is a limit to the enhancement from the viewpoint of management of electric power companies.

  When using a natural power source (natural power source), fluctuations in demand and output fluctuations from the natural power source are adjusted by the amount of power purchased from the power company. The problem of increasing the burden cannot be essentially solved.

  In view of the above-mentioned problems of the prior art, an object of the present invention is to connect a natural fluctuation power source such as wind power generation to a commercial system and operate economically without depending on the power supply adjustment power of an electric power company. An object of the present invention is to provide a method and system for adjusting the supply and demand of distributed power sources. It is another object of the present invention to provide a business model related to service and billing when operating the present invention.

  In order to solve the above-mentioned problems, the present invention supplies an electric power to a customer who has contracted in advance and has an adjusting power for balancing supply and demand (specific electric power company), wind power generation and the like. Establish a supply and demand adjustment system using distributed power sources that combine power generation companies with natural power sources.

  The present invention relates to a demand and supply adjustment system for a distributed power source that connects a plurality of consumer loads, a natural power source, and a power generator for adjustment with a power system, and adjusts the demand and supply. The means for collecting, the means for collecting information on the power generation amount of the natural variable power source, and the adjustment so as to balance the supply and demand between the demand and the supply including the natural variable power source from the collected information Supply and demand adjustment means for setting the output of the power generator for power generation, and communication means for transmitting the output control value to the power generator for adjustment.

  The supply and demand adjustment means calculates an optimum power generation amount in the adjustment power generation device from a prediction of demand at a time to be controlled and a predicted power generation value by the natural variable power source, and uses the command value as the power generation for adjustment It is sent to the control device of the apparatus, and the output of the power generator for adjustment is controlled.

  The present invention connects a load of a plurality of consumers and a distributed power source having a natural power source and a power generator for adjustment to an electric power system, and connects the load and power source to a supply and demand adjustment center through a communication network, thereby adjusting supply and demand. In the distributed power supply / demand adjustment service, the supply / demand adjustment center charges each customer's power fee as a consideration of the amount of power by the natural variable power supply and the amount of power by the power generator for adjustment, The supply / demand adjustment center is charged with a charge obtained by subtracting the service charge of the supply / demand adjustment center from the amount of electric power supplied to the customer, and the adjustment power generation device is connected to the supply / demand adjustment center. From the sum of the electricity charge supplied to the customer and the opportunity loss amount of the power generator for adjustment, the supply and demand adjustment service fee of the power generator for adjustment by the power supply and demand center is calculated. Characterized in that it charges pulling to.

  Here, when operating a supply and demand adjustment system using a distributed power source, a service provider that manages the supply and demand adjustment system using a distributed power source, a contract consumer, a power generation company having a naturally variable power source, and a controllable power generator You can sign a contract with a power generation company that has

  In this case, if the contract consumer is the contractor A, the power generation company having a naturally variable power source is the contractor B, the power generation company having a controllable power generation device is the contractor C, and the service provider is the contractor D, the contract is established. The contractor A concludes a contract with the contractor B and the contractor C regarding a supply and demand adjustment service using a distributed power source. For the contractor A, the maximum received power, the charge, etc., and the maximum purchase power, the charge, the incidental conditions, etc. for the contractor B and the contractor C, the supply and demand adjustment service side are determined in advance. On the other hand, the contractor D concludes a contract based on the connection supply agreement with a general electric power company (electric power company) having a transmission and distribution system, and pays a predetermined fee.

On the other hand, the contractor D supplies power to the contractor A, and the contractor A pays the contractor D with electricity as the compensation. The contractor B obtains the power price from the contractor D as a consideration for supplying the power. However, the contractor B can obtain the power price by subtracting the supply and demand adjustment service charge, which is possible only by the contractor D's supply and demand adjustment service. Become. The contractor B can provide a credit (tradeable certificate) of the RPS method, and the corresponding price can be obtained from the contractor D. The contractor C obtains a power price from the contractor D as a price for supplying power by a controllable power generation device. This electricity price includes consideration (such as opportunity loss) associated with supply and demand adjustment in addition to the amount corresponding to the amount of power supplied.

  When performing this service, the contractor D provides information collection devices, communication devices, control devices, information processing devices in the supply and demand adjustment center, etc. for collecting information from the contractors A, B, and C. It is possible to select whether to use the assets of the operator itself or to operate by leasing the assets of a third party. Some of the information collection device, communication device, control device, etc. are assets of the contractor A, the contractor B, or the contractor C, and can be operated by leasing them.

  When operating the supply and demand adjustment system with a distributed power supply and demand adjustment service, the contractor B predicts the power flow to the grid side based on the measured value of the natural variable power supply, and the contractor D owns it. The information is sent to the supply and demand control center. The contractor A periodically sends power demand information to the supply and demand control center. The contractor C periodically sends information on the equipment operation status and operational restrictions to the supply and demand control center.

  The supply and demand control center predicts the nearest demand based on information gathered from each contractor, determines the output of the controllable power generator owned by the contractor C, and sends it to the contractor C as a power generation command value. . The contractor C generates power based on the power generation command.

  According to the supply and demand adjustment method and system using a distributed power supply according to the present invention, a naturally fluctuating power supply with a large fluctuation in power generation output can be operated in conjunction with a commercial system without depending on the supply and demand adjustment capability of an electric power company. The necessary power is supplied to the consumer. In addition, the controllable power generator can save fuel and reduce costs. In addition, since the credit of the RPS method can be obtained for the amount of power generated by the natural fluctuation power source, an economic merit can be obtained including the sale of the surplus credit.

  The supply and demand adjustment of a distributed power source that can be operated economically by linking a naturally variable power source to a commercial system has been realized with a simple configuration.

  FIG. 1 shows an embodiment of the present invention, and is a configuration diagram of a supply and demand adjustment system using a distributed power source. In the customer premises 6 of the contractor A, there is a load device 63, which is connected to the power transmission / distribution system 1 via the switchgear 60. The power received by the corresponding customer is measured by the power measuring device 61, and the information is sent from the customer terminal 62 to the monitoring control device 31 in the supply and demand adjustment center 3 through the communication network 2.

  On the power generation company premises (power generation site) 4 of the contractor B, a naturally variable power source (wind power generation, etc.) 45, a conversion device 44, an inverse conversion device 43, and a secondary battery device 46 are installed. It is connected to the. The power generation sites I and III are generated by a natural power source, and the power sent to the power transmission / distribution system 11 is measured by the power measuring device 41 and monitored by the power supply terminal 42 via the communication network 2 and the supply / demand adjustment center 3. It is sent to the control device 31. The power generation device terminal 42 calculates a control command value for the secondary battery device 46 in order to reduce the power fluctuation at the connection point with the transmission and distribution systems 1 and 11 based on the collected information. A command value is sent to the next battery device 46. At the same time, a predicted value of the power sent to the power transmission and distribution system side at the nearest control timing is calculated and sent to the monitoring control device 31 in the supply and demand adjustment center 3.

  In the present embodiment, the power generation sites II and III are located adjacent to each other, and the power generation site II does not install the secondary battery device, and the secondary battery device 46 at the adjacent power generation site III compensates for the power fluctuation. I am doing so.

  The power generation company premises 5 of the contractor C is provided with a controllable power generation device 54, which is connected to the power transmission / distribution system 1 via the grid interconnection / switching device 50. The power sent to the power transmission / distribution system 1 side is measured by the power measuring device 51, and sent from the power generation device terminal 52 to the monitoring control device 31 in the supply and demand adjustment center 3 through the communication network 2. The power generation device terminal 52 determines the power generation output of each power generation device based on the power generation command value sent from the monitoring control device 31 in the supply and demand adjustment center 3, and sends it to the control device 53 to control the power generation output.

  The supply and demand adjustment center 3 of the contractor D determines the power generation amount of the controllable power generator from the information on the supply and demand sent from the contractor A, the contractor B, and the contractor C, and charges a fee (contract To the power generation company (contractors B and C).

  This supply and demand adjustment service is performed based on a contract between the contractor D and a general electric utility. Usually, it is a service between the contractors A, B, and C by the contractor D, but in the event of an accident of the contractor C or the like, a support service from a general electric utility is required. That is, the final supply and demand adjustment is performed by adjusting the power sent from the power plant 7 to the power transmission / distribution system 1 through the substation 77 according to the fluctuation in demand by the generator 73 of the power plant 7 owned by the general electric utility. Is realized. In this case, the contractor D pays the general electric utility.

  Next, the function of the supply and demand adjustment center 3 owned by the contractor D will be described with reference to FIGS.

  FIG. 2 is a block diagram of a monitoring control device installed in the supply and demand adjustment center 3. In the figure, the monitoring control device 31 includes an arithmetic processing device 232, a communication device 231, a display device 234, and an input device 233 for an operator to set conditions, etc. for exchanging information with each consumer and power generation company. Have. Furthermore, in order to calculate the demand output and the power generation output command value of the controllable power generation facility, the temporary storage device 271, the demand database (DB) 272, the weather information database 273, which store necessary information for a certain period of time. It has a status database 274, a maintenance information database 275, and a cost information database 276.

  FIG. 3 is an example of a monitoring control screen displayed on the display device 234. The display device 234 performs power generation device operation status, demand prediction, device abnormality display, and the like.

  For the demand, for each consumer 351, the current demand 352 and the predicted demand value 353 at the most recent time to be controlled are displayed.

  For the naturally varying power supply, the current generated power 355 and the predicted value 356 of the generated power at the most recent time to be controlled are displayed for each power generator 354. For the controllable power generator, the current generated power 358 of the power generator 357 and the generated power command value 359 at the most recent time to be controlled are displayed.

  The graph 361 displays the target of the generated power amount (thin solid line) and the actual generated power (thick solid line) of the controllable power generation apparatus necessary for balancing supply and demand. In addition, the deviation 362 between the demand and supply, the deviation 363 from the planned value of the generated electric energy, and the total purchased electric energy are displayed. Further, in the message column 365, device abnormality information, maintenance information, and the like are displayed.

  FIG. 4 is a processing flow in the monitoring control apparatus. This flow corresponds to one control cycle of the controllable power generator 54, and this process is repeated in actual operation.

  First, demand data is acquired from each consumer (1201). Next, the demand at the time of control (after X minutes) by the controllable power generator is predicted (1202). In addition, a predicted power generation value at the time of control (after X minutes) in the naturally varying power source is acquired (1203).

  Based on these pieces of information, the output PGI of the controllable power supply device is obtained by equation (1) (1204).

PGI = (PDI + PDII + PDIII) − (PWI + PWII + PWIII) (1)
Here, PDI, PDII, and PDIII are predicted demand values at the consumers I, II, and III, and PWI, PWII, and PWIII are predicted generated power values at the power generation sites I, II, and III having a naturally varying power source.

  Next, in the case of performing processing for bringing the power amount deviation within the target evaluation time closer to 0 (1205), correction (Δ) is added to the output of the controllable power generator (1206). That is, PGI is obtained by equation (2).

PGI = (PDI + PDII + PDIII) − (PWI + PWII + PWIII) + Δ (2)
In this embodiment, PGI is supplied by four power generators 54. Based on the latest maintenance information (1208), the operation constraints (output range, planned shutdown, etc.) of the controllable power generator are updated (1207), and the optimization calculation (1209) is performed using them as constraint conditions, and the individual power generation The power generation output of the apparatus is determined (1209) and transmitted to the control apparatus as a command value (1210).

  Next, a description will be given of a power generation apparatus terminal for a natural fluctuation power source. Here, a system of a naturally variable power source provided with a secondary battery device will be taken up, but operation in a system of a naturally variable power source not having a secondary battery device is also possible. In that case, the charge / discharge power control command value creation function, the remaining battery capacity measurement function, and the like can be omitted.

  FIG. 5 is a block configuration diagram of a power generation apparatus terminal of a natural variation power source. The power generation device terminal 42 includes a display device 631, an arithmetic processing device 633, an input device 632 for setting by an operator, a signal conversion device 636 for making measurement data necessary for arithmetic processing, and an arithmetic result as a control device 637. Output device 635 for sending to. Furthermore, a site operation information database (DB) 634 that records information related to site operation is provided.

  The signal converter 636 receives measurement values such as the output power of the inverse converter 45, the charge / discharge power of the secondary battery device, and the remaining battery level. A command value for controlling charging / discharging power is sent from the control device 637 to the secondary battery device 46.

  FIG. 6 is a processing flow in the power generation apparatus terminal of the natural fluctuation power source. This flow is one cycle of the control cycle of the controllable power generator, and this process is repeated in actual operation.

From the data of the site operation information database 634 and the latest measurement data stored in the temporary storage file 271 in the monitoring and control device 31 (supply / demand adjustment center), the trend of the output of the natural variable power source and the actual measured value of the secondary battery device are obtained. Obtain (1201). From the above trend, output prediction processing of a naturally varying power source at a time (after X minutes) at which control is performed on a controllable power source is performed (1202).

  When the measured value of the secondary battery remaining amount is significantly different from the predetermined planned value (1203), the measured output value of the secondary battery approaches the planned value based on the output target value based on the predicted output value of the power generation site. (1205). If the difference between the measured value and the planned value is within an allowable range, the output predicted value is set as the output target value (1204).

  Next, the secondary battery device is operated in accordance with the target value (1206), and the output target value of the power generation site is transmitted to the supply and demand adjustment center (1207). Further, the output of the power generation site and the remaining amount of the secondary battery are measured (1208) and stored in the temporary storage file and the site operation information database 634 (1209).

  FIG. 7 is an explanatory diagram illustrating an example of control by the power generator terminal for the natural variation power source. This example is applied to a wind power generator. FIG. 5A shows a case where output adjustment by a secondary battery is not performed, and FIG. 6B shows a case where output adjustment is made by a secondary battery. In the figure, the thin solid line represents the time variation of the output, and the thick solid line represents the average output per unit time (here, 1 minute).

  In the case of (a), since the secondary battery device is not provided, the equipment cost is reduced, but the output fluctuation is large, and the load of supply and demand adjustment by the controllable power generation device is increased. In the case of (b), the fluctuation range of the output can be reduced, and the burden of supply and demand adjustment by the controllable power generator can be reduced. On the other hand, an increase in equipment cost due to the provision of the secondary battery device is inevitable.

  Therefore, taking into consideration the magnitude and cycle of fluctuations in demand and natural fluctuation power supply, a system that does not provide a secondary battery device, a system that provides a secondary battery device with a small capacity that compensates only for short-term fluctuations, etc. It is desirable to select an optimal system configuration from among them.

  So far, the case where there is one power generation site having a controllable power generation device has been described, but the same is true for two or more power generation sites having controllable power generation devices. Each power generation site may coordinate the supply and demand. That is, the supply and demand adjustment center allows economical operation by allocating the power generation output of each site in consideration of the characteristics (power generation cost, partial load efficiency, etc.) of each power generation site.

  Next, the service provision and fee settlement methods between each contractor will be described. FIG. 8 is an explanatory view showing service provision and billing processing between contractors. The service and billing in FIG. 8 are performed via the communication network 2 shown in FIG. Accordingly, in the following, the contractor A in FIG. 8 is the customer terminal 62, the contractor B is the power generation device terminal 42, the contractor C is the power generation device terminal 52, and the contractor D is the function of the monitoring control device 31 of the supply and demand adjustment center 3. As: Of course, each contractor may be provided with a dedicated terminal for service and billing.

  Contractor D provides comprehensive supply and demand adjustment service (a) to contractor B (801). That is, the contractor D who is obligated to supply the contractor A supplies the contractor A with priority from the contractor B and the contractor C who can supply power, using the natural power of the contractor B.

  The electric power generated by the contractor B is entrusted to the contractor A by the power company connection supply service (b, c) (802, 803). That is, power (d) is supplied from the contractor B to the contractor A (804).

  Further, the contractor D can obtain a credit (e) in the RPS method (805). Part of the credit is necessary for the power business itself, but if there is a surplus, it can be sold (f) through relative transactions or through the market, and you can get the price corresponding to the sold credit. Yes (806, 807).

  From the contractor D to the contractor B, an amount of power and credit is subtracted from the price of the supply and demand adjustment service (808).

  Supply and demand adjustment in this power supply mode is performed by the power generation device of the contractor C. The electric power generated by the contractor C is consigned to the contractor A through the connection supply service (g, h) of the power company (809, 810). The contractor D pays a connection supply fee for the connection supply service provided by the power company (811). The connection supply fee is a consideration for the connection supply b, connection supply c, connection supply g, and connection supply h of the electric power company.

  In order to balance supply and demand, the supply and demand adjustment center of contractor D determines the amount of power generated by a controllable power generator based on the measured values collected from each contractor's site, and outputs it to contractor C. Command (i) is sent (812). In accordance with the command i, the generated power (j) is supplied from the contractor C to the contractor A (813).

  Since power generation by the contractor B is given priority, the contractor C may generate an opportunity loss (k) by performing power generation based on the output command (814). That is, when the contractor B and the contractor C can supply power with respect to the demand of the contractor A, the power supply by the contractor B has priority. It is less than the capacity of C, that is, it loses the opportunity for power supply and becomes a loss. However, in that case, since the fuel cost of the contractor C can be reduced, the difference becomes the opportunity loss evaluation amount.

  Accordingly, the contractor D to the contractor C pays an amount (j + ki) that is obtained by subtracting the price of the output command value providing service (supply / demand adjustment service) from the power amount price and the opportunity loss evaluation value (815). .

  From the contractor A to the contractor D, a power charge corresponding to the power (d) from the contractor B and the power (j) from the contractor C is paid (816).

  FIG. 9 is a system configuration diagram showing another embodiment of the present invention. This embodiment is substantially the same as the embodiment of FIG. 1, but a plurality of individuals who are individual consumers are connected to the low voltage distribution line 15 stepped down by the voltage converter 91 from the transmission / distribution system 11 to which the power generation site II is connected. Personal houses 93 are connected, and an electric vehicle 95 is connected. Further, a plurality of electric vehicles 95 that are stopped at the parking lot of the customer II are connected to the local low-voltage distribution line 16. The electric vehicle 95 is connected to the supply and demand adjustment center 3 via the communication network 2.

  The contractor D makes a contract in advance with respect to the use of the secondary battery of the electric vehicle with respect to the consumer II who owns the electric vehicle 95 and the customer II who can park the electric vehicle in the parking lot. The secondary battery is charged and discharged according to the command. In practice, not all electric vehicles 95 of the contracted customers are always available for supply and demand adjustment. Accordingly, the supply and demand adjustment center 3 sets the charge / discharge output for the electric vehicle 95 capable of charging / discharging the secondary battery at that time from among the customers who have contracted.

  Based on the amount of charge / discharge, the contractor D performs performance compensation on the owner of the electric vehicle 95 that cooperates with charge / discharge in the private house 93 and the parking lot of the customer II and the customer II.

  FIG. 10 is a schematic diagram showing an example of the configuration of a hybrid electric vehicle (hereinafter referred to as HEV). The drive portion is composed of an engine 2030, a fuel tank 2033, a generator 2031, a secondary battery 2032, a motor 2034, and the like. The electricity generated by the generator 2031 is converted into a direct current by the rectifier 2036 and stored in the secondary battery 2032. When output is necessary, the electricity of the secondary battery 2032 is converted into alternating current by the inverter 2037 and supplied to the electric motor 2034 to obtain the driving force of the wheels 2035. Information necessary for control is collected by the controller 2038 through the communication line 2040.

  In the premises of the customer II, a flexible power line 2042 for connecting the connecting portion 2041 and the premises low-voltage distribution line 16 is provided to supply power to the load device 65. In addition, a transmission / reception device 2043 is provided to send HEV status information to the supply and demand adjustment center 3 and to transmit an operation command from the center 3 to the controller 2038, and wireless communication is performed therebetween. The communication may be communication using wired communication or communication using power line carrier.

  An operation command from the supply and demand adjustment center 3 is transmitted to the controller 2038. In the case where power is transmitted from the HEV to the local low-voltage distribution line 16, the electrical characteristics (voltage magnitude, phase, etc.) of the local low-voltage distribution line 16 are measured and transmitted to the controller 2038. The controller 2038 adjusts (synchronizes) the magnitude and phase of the voltage with the control signal for controlling the output of the electric power generated by the inverter 2037 to the local low-voltage distribution line 16, so that the plurality of HEVs can convert the local low-voltage distribution line Power transmission to 16 is possible. In addition, power transmission to the low-voltage distribution line 15 is also possible from the electric vehicle 95 stopped in the private house 93 as described above. Here, the HEV has been described as an example, but the same applies to an electric vehicle or a fuel cell vehicle that runs only with electric power charged in the secondary battery.

  By using secondary batteries of a large number of electric vehicles, it becomes possible to balance supply and demand accompanying fluctuations in wind power generation. In general, the secondary battery has a high equipment cost, so it is often used to absorb only a short cycle load (for example, about a second) and fluctuations in generated power. It is also possible to absorb the imbalance with the secondary battery.

  As described above, according to this embodiment, the contractor A can obtain low-cost electric power and satisfy the environmental contribution. Contractor B performs a power generation business using a naturally variable power source without being restricted by the tender frame (which has been reduced) by the electric power company, and can obtain merits by selling power and selling RPS credits. The contractor C can sell the generated power as high as the evaluation associated with the supply and demand adjustment. The contractor D can carry out an electric power supply business using relatively cheap electric power from the natural fluctuation power source.

This facilitates the acquisition of RPS credits necessary for business continuity, and the society as a whole has the advantage of promoting naturally fluctuating power sources and reducing fossil fuel consumption and CO ₂ emissions. .

  In the above-described embodiment, the natural fluctuation power source that cannot be artificially controlled has been described. However, even for power generators that are difficult to control in terms of fuel supply, the power generation site compensates for fluctuations in the output of the power generator, and controllable power generation is possible for relatively long periods of load and power generator fluctuations. Supply and demand can be adjusted by following the apparatus.

The block diagram which shows one Example of the supply-and-demand adjustment system of the distributed power supply of this invention. The block block diagram of the monitoring control apparatus employ | adopted as one Example of this invention. Explanatory drawing of the monitoring screen in a monitoring control apparatus. The processing flow figure of the supply-and-demand adjustment system by one Example of this invention. The block block diagram of the generator apparatus for natural fluctuation power supplies by one Example of this invention. The processing flow figure of the generator apparatus for natural fluctuation power supplies by one Example of this invention. Explanatory drawing which shows the effect of control of the power generator for natural fluctuation power supplies. Explanatory drawing which shows the service provision between each contractor, and the method of charging. The block diagram which shows the other Example of the supply-and-demand adjustment system of the distributed power supply of this invention. The block diagram of the electric vehicle utilized for the electric power storage in the Example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 ... Power transmission / distribution system, 2 ... Communication network, 3 ... Supply and demand adjustment center, 4, 5 ... Power generation company premises, 6 ... Consumer premises, 7 ... Power plant, 15 ... Low voltage distribution line, 16 ... On-site low voltage distribution Electric wire, 31 ... monitoring control device, 41,51 ... power measurement device, 42,52 ... power generation device terminal, 46 ... secondary battery device, 53 ... control device, 54 ... power generation device, 61 ... power measurement device, 62 ... demand House terminal, 63 ... load device, 73 ... generator, 77 ... transformer, 93 ... private house, 95 ... electric car.

Claims (9)

In a supply and demand adjustment system for distributed power sources that connects the load of multiple consumers, a naturally variable power source, and a power generator for adjustment with a power system, and adjusts the demand and supply,
Means for collecting information on the demand of the consumer, means for collecting information on the power generation amount of the natural variable power source, and supply and demand of the demand and the supply including the natural variable power source from these collected information Supply / demand adjustment of a distributed power source, comprising: a supply / demand adjustment means for setting the output of the power generator for adjustment so as to balance, and a communication means for transmitting the output control value to the power generator for adjustment system. In a supply and demand adjustment system for distributed power sources that connects the load of multiple consumers, a naturally variable power source, and a power generator for adjustment with a power system, and adjusts the demand and supply,
Means for collecting information on the demand of the consumer, means for collecting information on the power generation amount of the natural variable power source, and supply and demand of the demand and the supply including the natural variable power source from these collected information Supply / demand adjustment means for setting the output of the adjustment power generator so as to balance, communication means for transmitting the output control value to the adjustment power generator, and connection to the supply / demand adjustment means via the communication means A power supply and demand adjustment system for a distributed power source, comprising:   3. The supply and demand adjustment means according to claim 1, wherein the supply and demand adjustment means calculates an optimal power generation amount in the adjustment power generation device from a prediction of demand at a time to be controlled and a predicted power generation value by the natural fluctuation power source, and the command A supply / demand adjustment system for a distributed power source, wherein a value is sent to a control device of the power generator for adjustment and an output of the power generator for adjustment is controlled.   The power storage device is an electric vehicle or a fuel cell vehicle. In a method for adjusting the supply and demand of a distributed power source, which connects a load of a plurality of consumers, a naturally variable power source, and a power generation device for adjustment with a power system, and adjusts the demand and supply,
Collect information related to the demand of the consumer and information related to the amount of power generated by the natural variable power source, and balance the demand and supply between the collected information and the supply including the natural variable power source. The power generation amount of the adjustment power generator is set, the output control value is transmitted to the control device of the adjustment power generator, and the output of the adjustment power generator is controlled. Adjustment method.   6. The supply and demand adjustment method for a distributed power source according to claim 5, wherein the power generation amount of the power generator for adjustment is calculated based on a prediction of demand at a time to be controlled and a predicted power generation value by the natural power source. .   6. The supply and demand adjustment method for a distributed power source according to claim 5, wherein electric power is supplied from an electric power storage device connected to the electric power system in accordance with fluctuations in power generated by the natural fluctuation power source. A distributed power source that adjusts the supply and demand by connecting a load of multiple customers and a distributed power source having a natural power source and a power generator for adjustment to a power system, and connecting the load and power source to a supply and demand adjustment center through a communication network. In the supply and demand adjustment service of
The supply and demand adjustment center charges the electricity charge of each consumer as a consideration of the amount of power by the natural fluctuation power source and the amount of power by the power generator for adjustment,
The natural variable power source charges the supply / demand adjustment center with a charge obtained by subtracting the service charge of the supply / demand adjustment center from the amount of electricity supplied to a consumer, and the power generation device for adjustment supplies the supply / demand adjustment center with the supply / demand adjustment center. Charging is performed by subtracting the supply and demand adjustment service fee of the power generation device for adjustment by the power supply and demand adjustment center from the sum of the electricity charge supplied to the consumer by the power generation device for adjustment and the opportunity loss amount of the power generation device for adjustment. Supply and demand adjustment service for distributed power supplies. 9. The distribution according to claim 8, wherein the supply and demand adjustment center pays a connection supply fee for the consumer, the natural fluctuation power source, and the power generation device for adjustment to a general electric power company connected to the power system. Power supply / demand adjustment service.

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