JP5268977B2 - Power supply system control method and power supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce power fluctuation in a power system configured by connecting a power generator having a large output variation to a low-order distribution line. <P>SOLUTION: First distribution lines 101 are each equipped with a first information processing device 10 for acquiring output of a generator 5 and power consumption of a load 6 to calculate a first supply-demand gap, second distribution lines 102 are each equipped with a second information processing device 20 for calculating a second supply-demand gap, and third distribution lines 103 are each equipped with a third information processing device 30 for calculating a third supply-demand gap. The first information processing devices 10 each acquire the second supply-demand gap from the second information processing device 20 installed in the higher-order second distribution line 102 connected directly to the first distribution lines 101, acquire the third supply-demand gap from the third information processing device 30 installed in the higher-order third distribution lines 103, and control power supply to the loads 6 on the basis of the first-third supply-demand gaps. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a control method for a power supply system and a power supply system, and more particularly to a technique for suppressing power flow fluctuations that occur in a power system in which a generator having a large output fluctuation is connected to a lower distribution line.

  Recently, power generation methods using natural energy such as solar power generators for household use have attracted attention, and it is expected that a large number of generators using natural energy will be connected to power systems such as commercial power systems in the future. ing. However, in the power generation method using natural energy, the output is likely to fluctuate depending on weather conditions and the like, and there is a concern about the influence (voltage fluctuation, frequency fluctuation) on the power system caused by such a power generation method.

  As a technique for preventing the influence on the power system, for example, Patent Document 1 discloses an output target value for detecting the output of the distributed power source and the storage amount, and suppressing the fluctuation of the output to the power system based on the storage amount. A power storage device is described that sets and adjusts the power so that the output to the power system becomes the output target value by comparing the output of the distributed power source with the output target value.

  Also, in Patent Document 2, a power fluctuation smoothing device connected to a power system together with a distributed power source detects the output of the distributed power source and the amount of power storage, and the moving average value of the output of the distributed power source is stored as the power storage amount or power storage amount. Depending on the alternative value, the adjustment value or correction coefficient is used to correct the output target value to the power system side and the output of the distributed power source, or the output to the power system side is fed back to the power system side. It is described that the charge / discharge unit is controlled so that the output to the output target value becomes the output target value.

JP 2001-327080 A JP 2002-17044 A

  By the way, in a power system having a hierarchical structure including a plurality of high-voltage distribution lines branching from a power plant to a substation and a plurality of low-voltage distribution lines branching from the high-voltage distribution lines, such as a commercial power system, There is a supply-demand difference between the generator connected to each of the distribution lines and the customer-side load, and this supply-demand difference causes tidal current fluctuations in the higher-voltage distribution lines. Moreover, each tidal current fluctuation of the high-voltage distribution line causes a tidal current fluctuation of the higher-order distribution lines. Therefore, it is effective to consider the hierarchical structure of the power system in order to suppress the propagation of tidal current fluctuations.

  This invention is made | formed in view of such a background, and it aims at providing the control method of the electric power supply system which can suppress the tidal current fluctuation in an electric power grid | system, and an electric power supply system.

  In order to achieve the above object, one aspect of the present invention includes a first distribution line to which one or more generators and one or more loads are connected, and one or more of the first distribution lines connected to a higher rank of the first distribution line. In the control method of the electric power supply system containing the 2nd distribution line which a 1st distribution line branches, and the 3rd distribution line which connects to the upper rank of the said 2nd distribution line, and one or more said 2nd distribution lines branch Then, the output of the generator connected to each of the first distribution lines, and the power consumption of the load connected to the first distribution lines are obtained, and the difference between supply and demand is obtained. The first information processing apparatus is provided with a first information processing device for obtaining a first supply-demand difference, and is attached to each of the first distribution lines connected to each of the second distribution lines. Second information processing that obtains the first supply-demand difference from a device and obtains a second supply-demand difference that is the supply-demand difference of the second distribution line And a second supply and demand that is a difference in supply and demand from the second information processing device attached to each of the second distribution lines connected to each of the third distribution lines. A third information processing device for obtaining a difference and obtaining a third supply / demand difference, which is a supply / demand difference of the third distribution line, is provided, and each of the first information processing devices is provided with the first distribution to which each is attached. The second distribution difference is acquired by communicating with the second information processing apparatus attached to the second distribution line connected to the upper direct line of the electric wires, and the first distribution to which each is attached The third supply / demand difference is acquired by communicating with the third information processing apparatus attached to the third distribution line connected to the direct higher rank of the electric wire, and the first supply / demand difference is acquired. Based on the second supply-demand difference and the acquired third supply-demand difference, And controlling the power supply to the load connected to the first distribution line being.

  As described above, in the present invention, in a hierarchical power system in which a generator using natural energy such as a solar power generator is connected to a lower distribution line (first distribution line) such as a low-voltage distribution line, the first distribution line is used. The first information processing apparatus attached to the electric wire is divided into the supply / demand difference (first supply / demand difference) in the first distribution line and the supply / demand difference (second supply / demand difference, third supply / demand difference) of the direct upper distribution line. Based on this, power supply to the load connected to the first distribution line is controlled. For this reason, surplus electric power can be used effectively between the 1st distribution line and the direct upper distribution line. In addition, by allowing surplus power to be accommodated in this way, it is possible to prevent fluctuations in the power flow on the upper side. In addition, it is possible to relax the margin for supply and demand adjustment set in the power system.

  Another aspect of the present invention is a method for controlling the power supply system, wherein the first information processing device is configured to store surplus power of the first distribution line, each of which is attached based on the first supply-demand difference. If there is surplus power, power is supplied to the load connected to the first distribution line, and if there is no surplus power in the first distribution line, the first supply line is based on the second supply-demand difference. The presence or absence of surplus power in the second distribution line connected to the direct upstream of the one distribution line is determined, and if there is surplus power in the second distribution line, the load connected to the first distribution line If there is no surplus power in any of the first distribution line and the second distribution line, the third power supply is connected to the direct higher rank of the first distribution line based on the third supply-demand difference. It is determined whether there is surplus power in the distribution line, and if there is surplus power in the third distribution line, the first distribution And supplying power to the load connected to the line.

  As described above, in the present invention, the first information processing apparatus determines whether there is surplus power by tracing the direct higher rank in order from the first distribution line, and if there is a distribution line in which the surplus power is generated, the first distribution line. Supply power to the load connected to the. According to this, the surplus power of the lower distribution line is effectively provided to the load, the supply-demand difference of the lower distribution line is alleviated, and the tidal current fluctuation on the upper side can be prevented.

Another aspect of the present invention is a method for controlling the power supply system, wherein the generator is a generator using natural energy, and the load is a storage load or a heat storage load. More specifically, the generator is a solar power generator, and the load is an electric vehicle storage battery.

  Thus, by consuming the output of the generator using natural energy by either the storage load or the heat storage load, it is possible to reduce the influence of the output fluctuation of the generator on the upper side. In addition, when solar power generators are disconnected all at once due to a grid fault, etc., the storage load or heat storage load is generally not operated at the time of disconnection. There is no.

  Another aspect of the present invention is a method for controlling the power supply system, wherein a boundary between the first distribution line and the second distribution line, and a boundary between the second distribution line and the third distribution line. It is assumed that at least one of a transformer or a circuit breaker is interposed.

  In addition, the subject which this application discloses, and its solution method are clarified by the column of the form for inventing, and drawing.

ADVANTAGE OF THE INVENTION According to this invention, the tidal current fluctuation | variation in an electric power grid | system can be suppressed.

1 is a schematic configuration diagram of a power supply system 1. FIG. 2 is a diagram illustrating a hardware configuration of a first information processing apparatus 10. FIG. It is a figure which shows the hardware constitutions of the 2nd thru | or 4th information processing apparatus 20,30,40. 2 is a diagram illustrating a hardware configuration of a measuring device 8. FIG. 2 is a diagram illustrating functions of the first information processing apparatus 10. FIG. It is a figure which shows the structure of the record of the data stored in the measured value database. 2 is a diagram illustrating functions of a second information processing device 20. FIG. 3 is a diagram illustrating functions of a third information processing apparatus 30. FIG. It is a figure which shows the function of the 4th information processing apparatus. 4 is a flowchart for explaining a process S700 performed by the first information processing apparatus 10. It is a flowchart explaining electric power supply control processing S728. The generator output (positive value) of the generator 5, the power consumption (negative value) of the load 6, the first supply-demand difference Pt, the second supply-demand difference Pf, the third supply-demand difference Pb, and the fourth supply-demand difference Ps, respectively. It is the schematic diagram which substituted and showed the specific numerical value. It is a schematic diagram which shows an example at the time of incorporating the 1st information processing apparatus 10 in a charge adapter.

  FIG. 1 shows a schematic configuration of a power supply system 1 described as an embodiment. As shown in the figure, the power supply system 1 is connected to the first distribution line 101 to which the generator 5 and the load 6 are connected, and the first distribution line 101 via the first transformer 51 (on the power plant side). The second distribution line 102 to be connected, the third distribution line 103 to be connected to the upper level of the second distribution line 102 through the first circuit breaker 52, the third through the second circuit breaker 53 and the second transformer 54. The fourth distribution line 104 connected to the upper part of the distribution line 103 and the fifth distribution line 105 connected to the upper part of the fourth distribution line 104 via the third circuit breaker 55 are included.

  The 1st distribution line 101 is a low voltage distribution line provided in the consumer side of a commercial power system, for example. The 2nd distribution line 102 and the 3rd distribution line 103 are high voltage distribution lines provided between a substation and a pole transformer in a commercial power system, for example. The 4th distribution line 104 is a high voltage distribution line provided in a substation. The fifth distribution line 105 is a high-voltage distribution line provided between the power plant and the substation. The first transformer 51 is, for example, a pole transformer or an underground transformer.

  In the following description, a set including the first distribution line 101, the generator 5 connected to the first distribution line 101, and the load 6 as elements is referred to as a first grid 71 (low voltage grid). . In the present embodiment, it is assumed that the first grid 71 exists for each first transformer 51.

  A set including one second distribution line 102 and all the first grids 71 existing below the second distribution line 102 is referred to as a second grid 72 (high voltage grid). In the present embodiment, it is assumed that the second grid 72 exists for each first circuit breaker 52.

  A set having one third distribution line 103 and all the second grids 72 existing below the third distribution line 103 as elements is referred to as a third grid 73 (bank grid). In the present embodiment, it is assumed that the third grid 73 exists for each second circuit breaker 53.

  Further, a set including one fourth distribution line 104 and all the third grids 73 existing below the fourth distribution line 104 is referred to as a fourth grid 74 (substation grid). In the present embodiment, it is assumed that the fourth grid 74 exists for each third circuit breaker 55.

  The generator 5 connected to the first distribution line 101 is, for example, a generator (solar generator, hydroelectric generator, wind generator, etc.) using natural energy. Further, as the load 6 connected to the first distribution line 101, for example, a suitable device is selected as a device that uses the output of a generator that uses natural energy. Such loads include, for example, power storage loads (batteries of electric vehicles (EV), storage batteries used for electric vehicles, etc.) and heat storage loads (water heaters, commercial heat storage air conditioners, etc.). In the following description, one of the loads 6 connected to the first distribution line 101 is referred to as a self-load, and the other load 6 outside the self-load. Is referred to as other load.

  A first information processing apparatus 10 (not shown) is attached to each of the loads 6 connected to the first distribution line 101. The first information processing apparatus 10 obtains the output of the generator 5 connected to the first distribution line 101 to which the load 6 (own load) to which each is attached is connected and the power consumption of the load 6. Then, based on the acquired generator output and power consumption, the supply / demand difference (hereinafter referred to as the first supply / demand difference) in the first distribution line 101 to which the load is connected is obtained, and the obtained first supply / demand difference is obtained. It transmits to the below-mentioned 2nd information processing apparatus 20 attached to the 2nd distribution line 102 connected to the upper rank of the said 1st distribution line 101 concerned. The first information processing apparatus 10 supplies power to the load 6 connected to the first distribution line 101 to which the own load is connected based on the obtained first supply / demand difference and second to fourth supply / demand differences described later. To control.

  Each of the second distribution lines 102 is connected to all the first information processing apparatuses 10 attached to the first distribution lines 101 connected to the lower order of each of the second distribution lines 102 so as to be communicable with each other. (Not shown) is attached. The second information processing device 20 acquires the first supply / demand difference from each of the first distribution lines 101 connected to the lower level of the second distribution line 102 to which each is attached, and based on the acquired first supply / demand difference Then, the supply / demand difference (hereinafter referred to as the second supply / demand difference) in the second distribution line 102 is obtained, and the obtained second supply / demand difference is transmitted to the first information processing apparatus 10 and a third information processing apparatus 30 described later (broadcast). )

  Each of the third distribution lines 103 is connected to all the second information processing apparatuses 20 attached to the second distribution lines 102 connected to the lower level of each of the third distribution lines 103 so as to be communicable with each other. (Not shown) is attached. The 3rd information processor 30 acquires the 2nd supply-and-demand difference from each of the 2nd distribution line 102 connected to the lower rank of the 3rd distribution line 103 to which each is attached, and based on the acquired 2nd supply-and-demand difference Then, the supply and demand difference (hereinafter referred to as the third supply and demand difference) in the third distribution line 103 is obtained, and the obtained third supply and demand difference is transmitted (broadcast) to the first information processing apparatus 10 and a fourth information processing apparatus 40 described later. )

  Each of the fourth distribution lines 104 is connected to all the third information processing apparatuses 30 attached to the third distribution line 103 connected to the lower level of each of the fourth information distribution apparatuses 40 (communication information processing apparatuses 40 ( (Not shown) is attached. The fourth information processing device 40 acquires the third supply / demand difference from each of the third distribution lines 103 connected to the lower level of the fourth distribution line 104 to which each is attached, and based on the acquired third supply / demand difference Then, the supply / demand difference in the fourth distribution line 104 (hereinafter referred to as the fourth supply / demand difference) is obtained, and the obtained fourth supply / demand difference is transmitted to the first information processing apparatus 10.

  Each of the generators 5 is communicably connected to the first information processing apparatus 10 attached to the load 6 of the first distribution line 101 to which each of the generators 5 is connected, and each output (hereinafter referred to as a generator output). Measurement device 8 (not shown) is attached to the first information processing device 10 and measures (transmits) the first information processing device 10. The measuring device 8 includes all the first information processing devices attached to the loads 6 connected to the first distribution lines 101 to which the generators 5 to which the measured generator outputs are attached are connected. 10 (broadcast).

  In addition, between the measuring device 8 and the first information processing device 10, between the first information processing device 10 and the second information processing device 20, between the second information processing device 20 and the third information processing device 30, Between the third information processing device 30 and the fourth information processing device 40, for example, LAN, WAN, Internet, power line communication (PLC (Power Line Communication)), dedicated line (power system control information transmission system (CDT: (Cyclic Digital data Transmission equipment), metal wire, optical fiber, etc.)

FIG. 2A shows the hardware configuration of the first information processing apparatus 10. As shown in the figure, the first information processing apparatus 10 includes a CPU 211, a memory 212 such as a RAM / ROM, a storage device 213 such as a hard disk, an input device 214 such as a keyboard and a mouse, and a display such as a liquid crystal display. A device 215, a communication circuit 216, a time measuring circuit 217 configured by using an RTC (Real Time Clock) or the like to generate date and time information (time stamp) such as the current date and time, and a measuring circuit 218 for measuring the power consumption of the load And a control circuit 219 for controlling power supply to the load.

  FIG. 2B shows a hardware configuration of the second information processing apparatus 20. As shown in the figure, the second information processing apparatus includes a CPU 311, a memory 312, and a communication circuit 313. Note that the third information processing apparatus 30 and the fourth information processing apparatus 40 also have the same hardware configuration as the second information processing apparatus 20.

  FIG. 3 shows a hardware configuration of the measuring device 8. As shown in the figure, the measurement device 8 includes a CPU 81 and a memory 82, a communication circuit 83 for communicating with the measurement command device 10 and the communication device 20, and a measurement circuit 84 for measuring the generator output of the generator 5. It has.

  FIG. 4 shows functions of the first information processing apparatus 10. As shown in the figure, the first information processing apparatus 10 includes a power consumption measuring unit 411, a self-load information transmitting unit 412, an other load information receiving unit 413, a generator output receiving unit 414, a supply-demand difference calculating unit 415, a supply-demand balance. A difference transmission unit 416, a supply and demand difference reception unit 417, and a power supply control unit 418 are provided. Note that these functions are realized by the hardware of the first information processing apparatus 10 or by the CPU 211 of the first information processing apparatus 10 reading and executing a program stored in the memory 212 or the storage device 213. Is done.

  As shown in the figure, the first information processing apparatus 10 includes a measurement value database 421. The measurement value database 421 is managed by, for example, a DBMS (Data Base Management System) that operates in the first information processing apparatus 10.

  Among the functions shown in FIG. 4, the power consumption measuring unit 411 measures the power consumption of the load 6 (hereinafter referred to as “self load power consumption”), and the measured self load power consumption is measured at the measurement time ( (Time stamp) and stored in the measured value database 421.

  The self-load information transmission unit 412 is attached to the other load connected to the same first distribution line 101 as the self-load to which the first information processing apparatus 10 is attached with the measured self-load power consumption. Transmit (broadcast) to the first information processing apparatus 10. The information to be transmitted is accompanied by a self-load identifier.

  The other load information receiving unit 413 is sent from the first information processing apparatus 10 attached to another load connected to the same first distribution line 101 as the own load to which the first information processing apparatus 10 is attached. The incoming power consumption of the other load (hereinafter referred to as the other load power consumption) is received together with the identifier of the other load, and the received other load power consumption is measured with the identifier and the other load power consumption. The measured value database 421 is stored in association with the time (time stamp).

  The generator output receiving unit 414 is sent from the measuring device 8 attached to the generator 5 connected to the same first distribution line 101 as the own load to which the first information processing device 10 is attached. The generator output is received together with the identifier of the generator 5 to which the measuring device 8 is attached, and the received generator output is correlated with the identifier and the measurement time (time stamp) of the generator output. Stored in the value database 421.

  The supply-demand difference calculation unit 415 includes the own load power consumption measured by the power consumption measurement unit 411, the other load power consumption received by the other load information reception unit 413, and the power generation acquired by the generator output acquisition unit 414. By summing the machine output, the supply-demand difference (hereinafter referred to as the first supply-demand difference) in the first grid where the load 6 to which the first information processing apparatus 10 is attached is present is calculated.

  The supply-demand difference transmission unit 416 uses the first supply-demand difference calculated by the supply-demand difference calculation unit 415 as the first higher-rank of the first distribution line 101 to which the load 6 to which the first information processing apparatus 10 is attached is connected. It transmits to the 2nd information processor 20 attached to 2 distribution lines 102.

  The supply-demand difference receiving unit 417 includes the second distribution line 102, the third distribution line 103, and the first distribution line, which are directly above the first distribution line 101 to which the load 6 to which the first information processing apparatus 10 is attached is connected. From each of the second information processing device 20, the third information processing device 30, and the fourth information processing device 40 attached to each of the four distribution lines 104, a second supply / demand difference, a third supply / demand difference, and The fourth supply / demand difference is received.

  The power supply control unit 418 includes a first supply-demand difference of the first distribution line 101 to which the load 6 to which the first information processing apparatus 10 is attached is connected, and 2 based on the second supply / demand difference, the third supply / demand difference, and the fourth supply / demand difference received from each of the information processing device 20, the third information processing device 30, and the fourth information processing device 40. The power supply of the load 6 to which the device 10 is attached is controlled. The power supply control is performed, for example, by turning on / off the power supply to the load 6 or increasing / decreasing the supply voltage.

  FIG. 5 shows the configuration of data records stored in the measured value database 421. As shown in the figure, this record includes items of a measurement value type 4211, an identifier 4212, a measurement value 4213, and an acquisition date 4214. Among these, the measurement value type 4211 is set to a value indicating whether the measurement value set in the record is the generator output of the generator 5 or the power consumption of the load 6. In the identifier 4212, an identifier (identifier uniquely assigned to each generator 5 or load 6) indicating which generator 5 or load 6 the record belongs to is set. In the measurement value 4213, a measurement value (generator output or power consumption) is set. In the acquisition date 4214, the acquisition date (time stamp) of the measurement value is set.

  FIG. 6A shows functions of the second information processing apparatus 20. Note that the functions shown in the figure are executed by the hardware of the second information processing apparatus 20 or the CPU 311 of the second information processing apparatus 20 reading and executing a program stored in the memory 312 or the storage device 313. It is realized by.

  The lower-level supply-demand difference total calculation unit 611 is attached to all the loads 6 connected to the first distribution lines 101 directly below the second distribution line 102 to which the second information processing apparatus 20 is attached. By receiving the first supply-demand difference from each of the one information processing apparatus 10 (hereinafter referred to as the direct information subordinate first information processing apparatus 10) and summing the received first supply-demand difference, A supply-demand difference (hereinafter referred to as a second supply-demand difference) is obtained.

  The lower-level supply-demand difference total transmission unit 612 uses the calculated second supply-demand difference as the direct upper rank of all the first information processing apparatuses 10 in the direct lower rank and the second distribution line 102 to which the second information processing apparatus 20 is attached. Is transmitted (broadcasted) to the third information processing apparatus 30 attached to the third distribution line 103.

  FIG. 6B shows functions of the third information processing apparatus 30. Note that the functions shown in the figure are executed by the hardware of the third information processing apparatus 30 or by the CPU 311 of the third information processing apparatus 30 reading and executing a program stored in the memory 312 or the storage device 313. It is realized by.

  The lower-level supply-demand difference total calculation unit 621 includes all the second information processing apparatuses 20 (hereinafter referred to as “second information distribution apparatuses”) attached to the second distribution lines 102 directly below the third distribution line 103 to which the third information processing apparatus 30 is attached. The second supply / demand difference is received from each of the direct subordinate second information processing devices 20), and the received second supply / demand difference is summed to obtain a supply / demand difference (hereinafter referred to as a third supply difference) in the third distribution line 103. (Referred to as supply-demand difference).

  The lower-level supply-demand difference total transmission unit 622 calculates the calculated third supply-demand difference as the direct upper rank of all the first information processing apparatuses 10 in the direct lower rank and the third distribution line 103 to which the third information processing apparatus 30 is attached. Is transmitted (broadcasted) to the fourth information processing apparatus 40 attached to the fourth distribution line 104. Note that transmission (broadcasting) of data from the third information processing apparatus 30 to the first information processing apparatus 10 is performed via the second information processing apparatus 20 that is a direct subordinate.

  FIG. 6C shows functions of the fourth information processing apparatus 40. Note that the functions shown in the figure are executed by the hardware of the fourth information processing apparatus 40 or the CPU 311 of the fourth information processing apparatus 40 reading and executing a program stored in the memory 312 or the storage device 313. It is realized by.

  The lower-level supply-demand difference total calculation unit 631 includes all the third information processing devices 30 (hereinafter referred to as the third information processing devices 30 attached to the direct distribution lower third distribution wires 103 of the fourth distribution wires 104 to which the fourth information processing device 40 is attached). The third supply-demand difference is received from each of the direct information subordinate third information processing devices 30), and all the received third supply-demand differences are summed to obtain a supply-demand difference (hereinafter, referred to as the fourth distribution line 104). (Referred to as the fourth supply-demand difference).

  The lower supply-demand difference total transmission unit 632 transmits (broadcasts) the obtained fourth supply-demand difference to all the first information processing apparatuses 10 in the direct lower order. Note that data transmission from the fourth information processing device 40 to the first information processing device 10 is performed via the second information processing device 20 and the third information processing device 30.

  Next, processing performed by the first information processing apparatus 10 will be described. FIG. 7 is a flowchart for explaining the above processing.

  In S <b> 710, the first information processing apparatus 10 determines whether or not the current time is an electricity rate discount time zone. If it is a discount time zone (S710: YES), the charger is turned on (S711). If it is not the discount time zone, the process proceeds to S721.

In S721, the power consumption measuring unit 411 measures the self-load power consumption, and stores the measured self-load power consumption in the measurement value database 421. Next, the self-load information transmission unit 412 connects the measured self-load power consumption to the first distribution line 101 to which the self-load to which the first information processing apparatus 10 is attached is connected. Is transmitted (broadcast) to the first information processing apparatus 10 attached to (S722).

  Next, the other load information receiving unit 413 is attached to the other load connected to the first distribution line 101 to which the own load to which the first information processing apparatus 10 is attached is connected. The other load power consumption sent from the apparatus 10 is received, and the received other load power consumption is stored in the measured value database 421 (S723).

  Next, the generator output receiving unit 414 is attached to the generator 5 connected to the first distribution line 101 to which the own load to which the first information processing apparatus 10 is attached is connected. The generator output sent from is received, and the received generator output is stored in the measured value database 421 (S724).

Next, the supply-demand difference calculation unit 415 adds the self-load power consumption measured in S721, the other load power consumption acquired in S722, and the generator output acquired in S723 to obtain the first supply-demand difference Pt. Calculate (S725).

  Next, the supply / demand difference transmission unit 416 directly connects the first distribution line 101 to which the load 6 to which the first information processing apparatus 10 is attached is connected to the first supply / demand difference Pt calculated by the supply / demand difference calculation unit 415. It transmits to the 2nd information processing apparatus 20 attached to the high-order 2nd distribution line 102 (S726).

  Next, the supply and demand difference receiving unit 417 includes the second distribution line 102, the third distribution line 103, and the first distribution line 101 connected to the load 6 to which the first information processing apparatus 10 is attached. And the second information processing apparatus 20, the third information processing apparatus 30, and the fourth information processing apparatus 40 respectively attached to the fourth distribution line 104, the second supply / demand difference Pf, the third supply / demand difference Pb. , And the fourth supply-demand difference Ps is received (S727).

  Next, the power supply control unit 418 receives the first supply-demand difference Pt calculated by the supply-demand difference calculation unit 415, and the second supply-demand difference Pf, the third supply-demand difference Pb, and the fourth supply-demand difference received by the supply-demand difference receiving unit 417. Based on Ps, power supply to the load 6 to which the first information processing apparatus 10 is attached is controlled (S728). Details of this processing will be described later.

  In S715, the first information processing apparatus 10 determines whether or not charging of the load 6 to which the first information processing apparatus 10 is attached has been completed. If completed (S715: YES), the process ends. If not completed (S715: NO), the process returns to S710.

  Next, the processing of S728 in FIG. 7 (hereinafter referred to as power supply control processing S728) will be described. FIG. 8 is a flowchart illustrating details of the power supply control process S728.

  First, in S812, S821, S831, and S841, the power supply control unit 418 determines that at least one of the first supply-demand difference Pt, the second supply-demand difference Pf, the third supply-demand difference Pb, and the fourth supply-demand difference Ps is a positive value. It is determined whether or not (power surplus). If at least one of the first supply-demand difference Pt, the second supply-demand difference Pf, the third supply-demand difference Pb, and the fourth supply-demand difference Ps is a positive value ((S812: YES) or (S821: YES) or (S831) : YES) or (S841: YES)), the process proceeds to S813. On the other hand, any of the first supply-demand difference Pt, the second supply-demand difference Pf, the third supply-demand difference Pb, and the fourth supply-demand difference Ps is not a positive value ((S812: NO) and (S821: NO) and (S831: NO) and (S841: NO)), the process proceeds to S851.

  In S813, the power supply control unit 418 determines from the measurement value database 421 the past from the current time of all the loads 6 connected to the first distribution line 101 to which the load 6 to which the first information processing apparatus 10 is attached is connected. Whether or not the load 6 having the maximum power consumption in the predetermined time is the load 6 (own load) to which the first information processing apparatus 10 is attached is acquired. to decide. Then, if the power consumption of the own load is maximum (S813: YES), the power supply control unit 418 supplies power to the load 6 (for example, turns on the battery charger of the electric vehicle) (S814). On the other hand, if the power consumption of the own load is not the maximum (S813: NO), the process returns to FIG. 7 and proceeds to S727.

  In S851, the power supply control unit 418 determines from the measurement value database 421 the past from the current time of all the loads 6 connected to the first distribution line 101 to which the load 6 to which the first information processing apparatus 10 is attached is connected. Whether or not the load 6 having the minimum power consumption in the predetermined time is the load 6 (own load) to which the first information processing apparatus 10 is attached is acquired. to decide. If the power consumption of the own load is minimum (S851: YES), the power supply control unit 418 stops power supply to the load 6 (for example, turns off the battery charger of the electric vehicle) (S852). . On the other hand, if the power consumption of the own load is not the minimum (S851: NO), the process returns to FIG. 7 (proceeds to S715 in FIG. 7).

  In this way, the power supply control unit 418 is configured to connect the first distribution line 101 connected to the load 6 to which the first information processing apparatus 10 is attached, or a direct distribution line (second line) of the first distribution line 101. When surplus power is present in at least one of the distribution line 102, the third distribution line 103, and the fourth distribution line 104), power is supplied to the load 6. For example, the generator 5 generates power using natural energy. Even when the generator output is not constant as in the case of the machine, the power can be stably supplied to the load 6. In addition, since the upper power distribution lines (second distribution line 102, third distribution line 103, and fourth distribution line 104) are traced sequentially from the lower order to determine the presence or absence of each surplus power, the change in the generator output It is possible to effectively prevent a change in the power flow of the upper-side distribution line caused by.

  In addition, the power supply control unit 418 is connected to the first distribution line 101 connected to the load 6 to which the first information processing apparatus 10 is attached, or a distribution line directly above the first distribution line 101 (second distribution line 102). When the surplus power does not exist in at least one of the third distribution line 103 and the fourth distribution line 104), the power supply to the load 6 is stopped, so that, for example, the generator is a natural energy generator. Thus, even in the case of a generator whose output is not constant, it is possible to prevent a change in the power flow of the upper distribution line due to a change in the generator output.

  FIG. 9 shows the generator output (positive value) of the generator 5, the power consumption (negative value) of the load 6, the first supply-demand difference Pt, the second supply-demand difference Pf, the third supply-demand difference Pb, and the fourth supply-demand difference. The schematic diagram which substituted and showed the specific numerical value for each of Ps is shown. In addition, the arrow line in the figure has shown the flow (supply / insufficiency) of electric power.

  As described above, according to the power supply system 1 of the present embodiment, surplus power can be effectively utilized between the first distribution line 101 and its direct upstream distribution line. In addition, by allowing surplus power to be accommodated in this way, it is possible to prevent fluctuations in the power flow on the upper side. In addition, it is possible to relax the margin for supply and demand adjustment set in the power system.

  Further, the first information processing apparatus 10 sequentially determines the presence or absence of surplus power by tracing the direct higher rank in order from the first distribution line 101. If there is a distribution line in which surplus power is generated, the first information processing apparatus 10 is connected to the first distribution line 101. Since the power supply to the load 6 is performed, the surplus power of the lower distribution line is effectively provided to the load 6, the supply and demand difference of the lower distribution line is alleviated, and the upper side power flow fluctuation is made effective Can be prevented.

  By the way, although the 1st information processing apparatus 10 may be comprised as a dedicated apparatus, you may incorporate the function of the 1st information processing apparatus 10 in the charge adapter used for charge of the storage battery of an electric vehicle, etc., for example. FIG. 10 is a schematic diagram illustrating an example when the first information processing apparatus 10 is incorporated in a charging adapter. Note that, in the example of the figure, between the first information processing device 10 (charging adapter) and other information processing devices (second information processing device 20, third information processing device 30, and fourth information processing device 40). Communication is configured to be performed via a watt-hour meter. Thus, by incorporating the function of the first information processing apparatus 10 into the charging adapter, it is not necessary to provide the first information processing apparatus 10 separately, and the complexity of installing the first information processing apparatus 10 is reduced. Can do.

  Embodiment described above is for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

  For example, in the above description, the boundary between the lower distribution line and the upper distribution line is either a transformer or a circuit breaker, but the boundary between the lower distribution line and the upper distribution line is a transformer or a circuit breaker. Any of these may be used.

  In the present embodiment, the case where the grids of the first to fourth layers exist has been described, but the present invention can be extended by the same method when the grid of n layers exists.

DESCRIPTION OF SYMBOLS 1 Electric power supply system 5 Generator 6 Load 8 Measuring apparatus 10 1st information processing apparatus 20 2nd information processing apparatus 30 3rd information processing apparatus 40 4th information processing apparatus 101 1st distribution line 102 2nd distribution line 103 3rd distribution Electric wire 104 Fourth distribution line 411 Power consumption measuring unit 412 Self load information transmitting unit 413 Other load information receiving unit 414 Generator output receiving unit 415 Supply / demand difference calculating unit 416 Supply / demand difference transmitting unit 417 Supply / demand difference receiving unit 418 Power supply control unit 421 Measured value database 611 Lower level supply-demand difference total calculation unit 612 Lower level supply-demand difference total transmission unit 621 Lower level supply-demand difference total calculation unit 622 Lower level supply-demand difference total transmission unit

Claims (5)

A first distribution line to which one or more generators and one or more loads are connected; a second distribution line that is connected to a higher level of the first distribution line and from which the one or more first distribution lines are branched; and A third distribution line connected to a higher rank of the second distribution line, and one or more of the second distribution lines branch, and a control method of the power supply system,
The output of the generator connected to each of the first distribution lines and the power consumption of the load connected to the first distribution lines are obtained for each of the first distribution lines, and the first difference that is the difference between the supply and demand. A first information processing device for determining the supply-demand difference is attached,
The second distribution line is obtained by obtaining the first supply-demand difference from the first information processing apparatus attached to each of the first distribution lines connected to each of the second distribution lines. A second information processing device for obtaining a second supply-demand difference, which is a supply-demand difference,
Obtaining a second supply-demand difference, which is a supply-demand difference, from the second information processing apparatus attached to each of the second distribution lines connected to each of the third distribution lines; A third information processing device for obtaining a third supply / demand difference, which is a supply / demand difference of the third distribution line, is attached,
Each of the first information processing devices communicates with the second information processing device attached to the second distribution line connected to the direct higher rank of the first distribution line to which the first information processing apparatus is attached. By acquiring the second supply-demand difference and communicating with the third information processing apparatus attached to the third distribution line connected to the direct higher rank of the first distribution line to which each is attached Obtaining the third supply-demand difference ,
The first information processing apparatus
Based on the first supply-demand difference, it is determined whether there is surplus power in the first distribution line to which each is attached, and if there is surplus power, power is supplied to the load connected to the first distribution line. ,
If there is no surplus power in the first distribution line, it is determined whether or not there is surplus power in the second distribution line connected to the direct higher rank of the first distribution line based on the second supply-demand difference, and the second distribution If there is surplus power in the wire, supply power to the load connected to the first distribution line,
If there is no surplus power in any of the first distribution line and the second distribution line, the surplus power of the third distribution line connected to the direct higher rank of the first distribution line based on the third supply-demand difference The method for controlling the power supply system is characterized in that if there is surplus power in the third distribution line, power is supplied to the load connected to the first distribution line . It is a control method of the electric power supply system according to claim 1 ,
The method of controlling an electric power supply system, wherein the generator is a generator using natural energy, and the load is a storage load or a heat storage load. It is a control method of the electric power supply system according to claim 2 ,
The method of controlling a power supply system, wherein the generator is a solar power generator, and the load is a storage battery of an electric vehicle. It is a control method of the electric power supply system according to any one of claims 1 to 3 ,
At least one of a transformer or a circuit breaker is interposed at the boundary between the first distribution line and the second distribution line and the boundary between the second distribution line and the third distribution line. A control method of a power supply system characterized by the above. A first distribution line to which one or more generators and one or more loads are connected; a second distribution line that is connected to a higher level of the first distribution line and from which the one or more first distribution lines are branched; and A power distribution system including a third distribution line connected to a higher rank of the second distribution line and branching one or more of the second distribution lines,
The output of the generator connected to each of the first distribution lines and the power consumption of the load connected to the first distribution lines are obtained for each of the first distribution lines, and the first difference that is the difference between the supply and demand. A first information processing device for determining the supply-demand difference is attached,
The second distribution line is obtained by obtaining the first supply-demand difference from the first information processing apparatus attached to each of the first distribution lines connected to each of the second distribution lines. A second information processing device for obtaining a second supply-demand difference, which is a supply-demand difference,
Obtaining a second supply-demand difference, which is a supply-demand difference, from the second information processing apparatus attached to each of the second distribution lines connected to each of the third distribution lines; A third information processing device for obtaining a third supply-demand difference, which is a supply-demand difference of the third distribution line, is attached;
Each of the first information processing devices communicates with the second information processing device attached to the second distribution line connected to the direct higher rank of the first distribution line to which the first information processing apparatus is attached. By acquiring the second supply-demand difference and communicating with the third information processing apparatus attached to the third distribution line connected to the direct higher rank of the first distribution line to which each is attached Obtaining the third supply-demand difference ,
The first information processing apparatus
Determining whether the excess power of the first distribution line, respectively on the basis of the previous SL first supply difference is attached, supply power to the load is excess power is connected to the first distribution line if there And
If there is no surplus power in the first distribution line, it is determined whether or not there is surplus power in the second distribution line connected to the direct higher rank of the first distribution line based on the second supply-demand difference, and the second distribution If there is surplus power in the wire, supply power to the load connected to the first distribution line,
If there is no surplus power in any of the first distribution line and the second distribution line, the surplus power of the third distribution line connected to the direct higher rank of the first distribution line based on the third supply-demand difference The power supply system is characterized in that power is supplied to the load connected to the first distribution line if there is surplus power in the third distribution line .

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