JP4139821B2 - Power distribution control device and monitoring method - Google Patents

Power distribution control device and monitoring method Download PDF

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JP4139821B2
JP4139821B2 JP2005094654A JP2005094654A JP4139821B2 JP 4139821 B2 JP4139821 B2 JP 4139821B2 JP 2005094654 A JP2005094654 A JP 2005094654A JP 2005094654 A JP2005094654 A JP 2005094654A JP 4139821 B2 JP4139821 B2 JP 4139821B2
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JP2006280082A (en
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保憲 武内
弘典 角井
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Chugoku Electric Power Co Inc
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16—Electric power substations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission

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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Description

本発明は、分散型電源と連系可能な配電系統を制御する配電自動化システム等の配電制御装置、この配電制御装置が分散型電源を監視する監視方法に関する。   The present invention relates to a power distribution control device such as a power distribution automation system that controls a power distribution system that can be linked to a distributed power source, and a monitoring method in which the power distribution control device monitors a distributed power source.

最近、工場やビル、一般住宅等の需要家宅において、例えば太陽光発電システム、風力発電システム、コジェネレ−ション設備等の比較的小規模な発電システムを商用電源の配電系統に連系させる分散型電源が普及しつつある（例えば、特許文献１、２参照。）。   Recently, distributed power sources that connect relatively small-scale power generation systems, such as solar power generation systems, wind power generation systems, and cogeneration facilities, to commercial power distribution systems in consumer homes such as factories, buildings, and general houses. (See, for example, Patent Documents 1 and 2).

図４のブロック図を参照しつつ、この分散型電源と、配電系統を制御する配電自動化システムとの連系例について説明する。ここで、連系とは、分散型電源と、電力会社が供給する商用ラインである配電系統とが電気的に接続し、この分散型電源と配電系統とが連系動作することを意味する。同図によれば、変電所２０からの高圧（例えば６．６ｋＶ）配電線２１０は、柱上変圧器４０を介して需要家宅へ低圧（例えば２１０Ｖ）配電線６２０として引き込まれている。また、柱上変圧器４０近傍に柱上開閉器４１が設けられており、ここで高圧配電線２１０を遮断又は接続が可能となっている。この柱上開閉器４１の入り・切りは、その近傍に設けられた遠方監視制御装置の子局（以後、遠制子局と略称する）４２を介し、更に光通信線３１０及び電力会社が管轄する通信網３００を介して、配電遠方監視制御装置の親局（以後、配電遠制親局と略称する）５５０により制御される。この配電遠制親局５５０は、前記の子局４２に制御信号を送信する機能を有するものである。この親局５５０は、配電用サーバ５１０及び監視制御用端末５２０と通信線５６０を介して相互に接続され、配電自動化システム５０として電力会社の営業所に設置されている。分散型電源７０は、需要家宅へ引き込まれた低圧配電線６２０を介して配電系統２と連系可能となっている。具体的には、低電圧配電線６２０に対して、需要家宅内の負荷（不図示）とともに分散型電源７０が接続されている。   With reference to the block diagram of FIG. 4, an example of interconnection between this distributed power source and a distribution automation system that controls the distribution system will be described. Here, the term “interconnection” means that a distributed power source and a power distribution system that is a commercial line supplied by an electric power company are electrically connected, and the distributed power source and the power distribution system operate in an interconnected manner. According to the figure, the high voltage (for example, 6.6 kV) distribution line 210 from the substation 20 is drawn into the customer's house as a low voltage (for example, 210 V) distribution line 620 through the pole transformer 40. Moreover, the pole switch 41 is provided in the vicinity of the pole transformer 40, and the high voltage distribution line 210 can be cut off or connected here. The pole switch 41 is turned on and off via a remote station (hereinafter referred to as a remote control station) 42 of a remote monitoring control device provided in the vicinity thereof, and further controlled by the optical communication line 310 and the electric power company. The network is controlled by a master station (hereinafter abbreviated as a “distribution remote control master station”) 550 of the power distribution far-field monitoring control device via the communication network 300. The power distribution distance control master station 550 has a function of transmitting a control signal to the slave station 42. The master station 550 is connected to the power distribution server 510 and the monitoring control terminal 520 via the communication line 560 and is installed as a power distribution automation system 50 at a sales office of an electric power company. The distributed power source 70 can be connected to the power distribution system 2 via the low-voltage distribution line 620 drawn into the customer's house. Specifically, a distributed power source 70 is connected to the low voltage distribution line 620 together with a load (not shown) in the customer's house.

この分散型電源７０は、配電系統２からの配電停止時に自身が稼動している所謂単独運転の有無を判別して、自身を低圧配電線６２０から解列する機能を有している。例えば、この分散型電源７０は、系統基本波に同調したその非整数倍の周波数の次数間高調波の電流を生成する次数間高調波生成部７０ａを備えている（例えば、特許文献３参照。）。分散型電源７０は、この次数間高調波の電流を需要家宅から配電系統２に注入し、当該周波数について配電系統２のインピーダンス又はアドミタンスの変化を検出することにより単独運転の有無を判別する。また、この分散型電源７０は、配電系統２に注入された次数間高調波の電流を次数間高調波検出部７１により検出することにより、配電時の自身の運転状態を判別する機能も有している。例えば１つの需要家宅に複数の分散型電源７０が設置されている場合、この次数間高調波検出部７１は、これら複数の分散型電源７０に共通して設けられるものである。   The distributed power source 70 has a function of determining whether or not there is a so-called single operation in which the power source is operating when power distribution from the power distribution system 2 is stopped, and disconnecting the power source from the low-voltage power distribution line 620. For example, the distributed power source 70 includes an inter-order harmonic generation unit 70 a that generates an inter-order harmonic current of a frequency that is a non-integer multiple of the frequency tuned to the system fundamental wave (see, for example, Patent Document 3). ). The distributed power source 70 injects this interharmonic current from the customer's home into the distribution system 2 and determines the presence or absence of the single operation by detecting a change in the impedance or admittance of the distribution system 2 for the frequency. In addition, the distributed power source 70 has a function of determining its own operating state at the time of power distribution by detecting an inter-order harmonic current injected into the power distribution system 2 by an inter-order harmonic detection unit 71. ing. For example, when a plurality of distributed power sources 70 are installed in one customer's house, the inter-order harmonic detection unit 71 is provided in common to the plurality of distributed power sources 70.

以上述べた分散型電源７０によれば、例えば配電自動化システム５０を通じて柱上開閉器４１等を切りにして、配電系統２からこの分散型電源７０への配電を停止した場合、低圧配電線６２０を経由して配電系統２に逆潮流が流れる心配は無い。よって、例えば配電線作業、配電系統切替操作、配電線事故発生等に際し、逆潮流に伴う感電、系統事故、事故被害の拡大等の虞も無い。また、次数間高調波検出部７１による検出結果を例えば監視員がモニタすることにより、配電時における分散型電源７０の運転状態も監視可能である。つまり、配電系統２と分散型電源７０との連系状態が配電時でも監視可能ということになる。よって、複数の分散型電源７０が配電系統２と連系可能となっている場合には、例えば各監視結果に基づいて各連系状態を統合的に把握すれば、電力会社の営業所における運転員は、配電自動化システム５０を通じて系統操作を常時安全に実施できる。
特開平１１−８９０９３号公報 特開２０００−３５８３３０号公報 特開２００１−２９８８６５号公報 According to the distributed power source 70 described above, for example, when the distribution switch 2 is stopped from the distribution system 2 by turning off the pole switch 41 or the like through the distribution automation system 50, the low voltage distribution line 620 is connected. There is no concern that a reverse power flow will flow through the distribution system 2 via the route. Therefore, there is no risk of electric shock due to reverse power flow, system accidents, accident damage expansion, etc., for example, during distribution line work, distribution system switching operation, and distribution line accident occurrence. Further, for example, a monitoring person monitors the detection result by the inter-order harmonic detection unit 71, so that the operating state of the distributed power source 70 during power distribution can be monitored. That is, the connection state between the power distribution system 2 and the distributed power source 70 can be monitored even during power distribution. Therefore, when a plurality of distributed power sources 70 can be connected to the power distribution system 2, for example, if each connection state is grasped in an integrated manner based on each monitoring result, the operation at the sales office of the power company is performed. Personnel can always perform system operation safely through the distribution automation system 50.
JP 11-89093 A JP 2000-358330 A JP 2001-298865 A

しかしながら、前述した構成において配電系統と分散型電源との連系状態が配電時でも監視可能となるためには、この分散型電源が少なくとも前述した次数間高調波生成部７０ａ（図４）を備えていることが必要である。このため、例えば需要家宅に既設の分散型電源を配電系統２に新たに連系させる場合、次数間高調波生成部７０ａを組み込むべくこの分散型電源を改造する必要が生じ、電力会社としてはその顧客に負担をかけることになる。   However, in order to be able to monitor the interconnection state between the power distribution system and the distributed power source even during power distribution in the configuration described above, this distributed power source includes at least the inter-order harmonic generation unit 70a (FIG. 4). It is necessary to be. For this reason, for example, when newly connecting a distributed power source installed in a customer's house to the distribution system 2, it is necessary to modify the distributed power source to incorporate the inter-order harmonic generation unit 70a. This will put a burden on the customer.

また、前述した次数間高調波検出部７１による検出結果を配電自動化システム５０（図４）の運転に効果的に反映させるためには、この次数間高調波検出部７１を少なくとも電力会社が管轄する通信網３００（図４）と通信可能に接続する必要がある。このため、例えば分散型電源７０（図４）を監視する専用の通信線を需要家宅に新設する必要が生じ、これも顧客に負担をかけることになる。   Moreover, in order to effectively reflect the detection result by the inter-order harmonic detection unit 71 described above in the operation of the distribution automation system 50 (FIG. 4), at least the power company has jurisdiction over the inter-order harmonic detection unit 71. The communication network 300 (FIG. 4) needs to be communicably connected. For this reason, for example, a dedicated communication line for monitoring the distributed power supply 70 (FIG. 4) needs to be newly installed in the customer's house, which also places a burden on the customer.

本発明はかかる課題に鑑みてなされたものであり、その目的とするところは、電力需要側の分散型電源と、電力供給側との連系状態をこの電力需要側に負担をかけずに監視可能な配電制御装置を提供することにある。   The present invention has been made in view of such a problem, and an object of the present invention is to monitor a connection state between a distributed power source on the power demand side and the power supply side without imposing a burden on the power demand side. It is to provide a possible power distribution control device.

前記課題を解決するための発明は、第１電圧を送電する第１配電線から分岐するとともに前記第１電圧より低い第２電圧を送電する第２配電線に対して、分散型電源が接続又は遮断されることを監視する配電制御装置であって、前記第２配電線の電力信号に前記分散型電源が接続又は遮断されたことを示す情報信号が重畳されている場合、当該情報信号を分離する第１中継器と、前記第１中継器によって分離された情報信号を受信し、前記分散型電源が前記第２配電線に対して接続又は遮断の何れの状態であるのかを判別する判別部と、を備え、前記第１中継器は、前記第２配電線の電力信号に重畳された情報信号を分離するＰＬＣ（Power Line Communication）モデムであることを特徴とする。 The invention for solving the above-described problem is that a distributed power source is connected to a second distribution line that branches from a first distribution line that transmits a first voltage and transmits a second voltage lower than the first voltage. A power distribution control device that monitors the disconnection, and when the information signal indicating that the distributed power source is connected or disconnected is superimposed on the power signal of the second distribution line, the information signal is separated A first repeater that receives the information signal separated by the first repeater, and a determination unit that determines whether the distributed power source is connected to or disconnected from the second distribution line The first repeater is a PLC (Power Line Communication) modem that separates an information signal superimposed on a power signal of the second distribution line .

この配電制御装置の判別部は、第１中継器により第２配電線の電力信号から分離された情報信号に基づいて、分散型電源が第２配電線に対する接続又は遮断の状態を判別できる。また、この情報信号が例えば分散型電源の出力電圧を示す情報を更に有するものとすれば、判別部は、第１配電線や第２配電線等を備えた配電系統に対する分散型電源の連系動作を監視できることにもなる。一方、分散型電源から第１中継器までの情報信号の伝送路は、電力信号を伝送するための例えば既設の第２配電線である。よって、配電系統及び配電制御装置を管理する例えば電力供給側が、分散型電源を管理する例えば電力需要側に対して、情報信号を伝送するための専用の通信線を開設させる等の負担を強いることが無い。従って、電力需要側の分散型電源と電力供給側との連系状態をこの電力需要側に負担をかけずに監視可能な配電制御装置が提供されたことになる。   The determination unit of the power distribution control device can determine whether the distributed power source is connected to or disconnected from the second distribution line based on the information signal separated from the power signal of the second distribution line by the first repeater. Further, if this information signal further includes, for example, information indicating the output voltage of the distributed power supply, the determination unit connects the distributed power supply to the power distribution system including the first distribution line, the second distribution line, and the like. It will also be possible to monitor the operation. On the other hand, the information signal transmission path from the distributed power source to the first repeater is, for example, an existing second distribution line for transmitting a power signal. Therefore, for example, the power supply side that manages the distribution system and the distribution control device imposes a burden such as opening a dedicated communication line for transmitting information signals to the power demand side that manages the distributed power source, for example. There is no. Therefore, a power distribution control device that can monitor the interconnection state between the distributed power source on the power demand side and the power supply side without placing a burden on the power demand side is provided.

また、かかる配電制御装置において、前記分散型電源が前記第２配電線に対して接続又は遮断されることを指示する指示信号を発信する発信部と、前記第２配電線の電力信号に前記発信部から発信された指示信号を重畳させる第２中継器と、を更に備え、前記第２中継器は、前記第２配電線の電力信号に前記指示信号を重畳させるＰＬＣ（Power Line Communication）モデムであり、前記第２配電線の電力信号に重畳された指示信号に基づいて、前記分散型電源が前記第２配電線に対して接続又は遮断の何れかの状態に設定された後、前記第２配電線の電力信号に前記判別部が判別するための情報信号が重畳されることが好ましい。 Further, in the power distribution control device, a transmission unit that transmits an instruction signal instructing that the distributed power supply is connected to or disconnected from the second distribution line, and the transmission to the power signal of the second distribution line. A second repeater that superimposes the instruction signal transmitted from the unit, and the second repeater is a PLC (Power Line Communication) modem that superimposes the instruction signal on the power signal of the second distribution line. There, based on the superimposed instruction signal to the power signal of the second distribution line, after the dispersed type power supply is set to one state of the connection or cutoff to the second distribution line, the second It is preferable that an information signal for the determination by the determination unit is superimposed on the power signal of the distribution line.

また、かかる配電制御装置において、前記第２配電線の電力信号に重畳される情報信号は、前記分散型電源の出力電圧を示す情報を、更に有することが好ましい。   In the power distribution control device, it is preferable that the information signal superimposed on the power signal of the second distribution line further includes information indicating an output voltage of the distributed power source.

また、かかる配電制御装置において、前記第２配電線の電力信号に重畳される指示信号は、前記分散型電源の出力電圧を設定する情報を、更に有することが好ましい。   In the power distribution control device, it is preferable that the instruction signal superimposed on the power signal of the second distribution line further includes information for setting an output voltage of the distributed power source.

また、かかる配電制御装置において、前記第１中継器は、複数の前記分散型電源が如何なる状態であるかを示す複数の前記情報信号を、前記判別部に送信し、複数の前記情報信号は各々、複数の前記分散型電源の何れの信号であるのかを示す情報を含み、前記情報信号が複数の前記分散型電源の何れの信号であるのかを前記判別部が判別する際に用いる、前記情報に対応する第１識別情報が記憶された第１記憶部、を更に備えたことが好ましい。   In the power distribution control device, the first repeater transmits a plurality of information signals indicating a state of the plurality of distributed power sources to the determination unit, and the plurality of information signals are respectively The information includes information indicating which signal of the plurality of distributed power supplies is used, and the information used by the determination unit to determine which signal of the plurality of distributed power supplies is the information signal. It is preferable to further include a first storage unit in which first identification information corresponding to is stored.

また、かかる配電制御装置において、前記第２中継器は、複数の前記分散型電源の状態を設定するための複数の前記指示信号を出力し、複数の前記指示信号は各々、複数の前記分散型電源の何れの信号であるのかを示す第２識別情報を含み、前記発信部が前記指示信号を送信する際に用いる前記第２識別情報が記憶された第２記憶部、を更に備えたことが好ましい。   In the power distribution control device, the second repeater outputs a plurality of instruction signals for setting a plurality of distributed power supply states, and each of the plurality of instruction signals includes a plurality of the distributed types. A second storage unit that includes second identification information that indicates which signal of the power supply is used, and that stores the second identification information that is used when the transmission unit transmits the instruction signal; preferable.

また、かかる配電制御装置において、前記第１中継器及び前記第２中継器と前記分散型電源との間には、前記第１中継器が前記第２配電線の電力信号から分離すべき情報信号を当該電力信号に重畳させるか、又は、前記第２中継器が前記第２配電線の電力信号に重畳させた指示信号を当該電力信号から分離する第３中継器と、前記第３中継器から得られる指示信号に応じて、前記第２配電線と前記分散型電源とを接続又は遮断する開閉器と、前記第３中継器が前記第２配電線の電力信号に重畳すべき情報信号を生成する生成部と、が設けられ、前記第３中継器は、前記第２配電線の電力信号に重畳された情報信号を分離し、且つ、前記第２配電線の電力信号に前記指示信号を重畳させるＰＬＣ（Power Line Communication）モデムであることが好ましい。 Further, in the power distribution control device, the information signal that the first repeater should separate from the power signal of the second distribution line between the first repeater and the second repeater and the distributed power source. Or the third repeater for separating the instruction signal superposed on the power signal of the second distribution line from the power signal by the second repeater, and the third repeater. According to the obtained instruction signal, a switch for connecting or disconnecting the second distribution line and the distributed power source and an information signal for the third repeater to be superimposed on the power signal of the second distribution line And a generation unit configured to separate the information signal superimposed on the power signal of the second distribution line and superimpose the instruction signal on the power signal of the second distribution line. Oh Rukoto is preferably in the cause PLC (Power Line Communication) modem .

また、かかる配電制御装置において、前記第１中継器及び前記第２中継器は親局であり、前記第３中継器は家屋に設けられた子局である、ことが好ましい。   In the power distribution control device, it is preferable that the first repeater and the second repeater are master stations, and the third repeater is a slave station provided in a house.

また、前記課題を解決するための発明は、第１電圧を送電する第１配電線から分岐するとともに前記第１電圧より低い第２電圧を送電する第２配電線に対して、分散型電源が接続又は遮断されることを監視する配電制御装置の監視方法であって、前記第２配電線の電力信号に前記分散型電源が接続又は遮断されたことを示す情報信号が重畳されている場合、当該情報信号を、前記第２配電線の電力信号に重畳された情報信号を分離するＰＬＣ（Power Line Communication）モデムにより分離する分離ステップと、前記分離ステップにおいて分離された情報信号を受信し、前記分散型電源が前記第２配電線に対して接続又は遮断の何れの状態であるのかを判別する判別ステップと、を備えてなる。 Moreover, the invention for solving the above-described problem is that a distributed power source is provided for a second distribution line that branches from a first distribution line that transmits a first voltage and transmits a second voltage lower than the first voltage. In the monitoring method of the distribution control device that monitors connection or disconnection, when an information signal indicating that the distributed power source is connected or disconnected is superimposed on the power signal of the second distribution line, A separation step of separating the information signal by a PLC (Power Line Communication) modem that separates the information signal superimposed on the power signal of the second distribution line; and receiving the information signal separated in the separation step; A determination step of determining whether the distributed power source is connected or disconnected with respect to the second distribution line.

また、かかる配電制御装置の監視方法において、前記分散型電源が前記第２配電線に対して接続又は遮断されることを指示する指示信号を発信する発信ステップと、前記第２配電線の電力信号に前記発信部から発信された指示信号を、前記第２配電線の電力信号に前記指示信号を重畳させるＰＬＣ（Power Line Communication）モデムにより重畳する第１の重畳ステップと、前記第２配電線の電力信号に重畳された指示信号に基づいて、前記分散型電源が前記第２配電線に対して接続又は遮断の何れかの状態に設定された後、前記第２配電線の電力信号に前記判別ステップにおいて判別するための情報信号を重畳する第２の重畳ステップと、を更に備えたことが好ましい。 Moreover, in the monitoring method of the power distribution control device, a transmission step of transmitting an instruction signal instructing that the distributed power source is connected to or disconnected from the second power distribution line, and a power signal of the second power distribution line A first superimposing step of superimposing an instruction signal transmitted from the transmitter on a power line communication (PLC) modem that superimposes the instruction signal on a power signal of the second distribution line; Based on the instruction signal superimposed on the power signal, the distributed power source is set to either the connected state or the disconnected state with respect to the second distribution line, and then the determination is made to the power signal of the second distribution line. It is preferable to further include a second superimposing step of superimposing an information signal for discrimination in the step.

電力需要側の分散型電源と電力供給側との連系状態をこの電力需要側に負担をかけずに監視可能な配電制御装置を提供できる。   It is possible to provide a power distribution control device capable of monitoring the interconnection state between the distributed power source on the power demand side and the power supply side without placing a burden on the power demand side.

＝＝＝配電制御装置の構成＝＝＝
図１を参照しつつ、本実施の形態の配電系統１における主に配電自動化システム１０と分散型電源３０との接続例について説明する。同図は、本実施の形態の配電自動化システム１０の構成例、及びこれと周辺装置との接続例を示すブロック図である。 === Configuration of Power Distribution Control Device ===
A connection example of the distribution automation system 10 and the distributed power supply 30 in the distribution system 1 of the present embodiment will be mainly described with reference to FIG. FIG. 2 is a block diagram illustrating a configuration example of the power distribution automation system 10 according to the present embodiment and a connection example between the system and peripheral devices.

本実施の形態では、電力会社の営業所に設置された配電自動化システム１０と、電力会社の電柱に設置された柱上開閉器４１の遠制子局４２とは、光通信線３１０を介して相互に通信可能に接続されている。この柱上開閉器４１は、高圧（例えば６．６ｋＶ）配電線（第１配電線）２１０を遮断又は接続する機能を有するものである。また、この柱上開閉器４１は、高圧配電線２１０において、変電所２０からの電圧を降圧し低圧（例えば２１０Ｖ）配電線（第２配電線）２２０を通じて需要家宅（家屋）へ配電するための柱上変圧器４０の近傍に設けられている。   In the present embodiment, the power distribution automation system 10 installed at the sales office of the power company and the remote control station 42 of the pole switch 41 installed on the power pole of the power company are connected via the optical communication line 310. They are connected so that they can communicate with each other. The pole switch 41 has a function of interrupting or connecting a high voltage (for example, 6.6 kV) distribution line (first distribution line) 210. Further, the pole switch 41 is used to step down the voltage from the substation 20 in the high-voltage distribution line 210 and distribute the power to the customer's house (house) through the low-voltage (for example, 210V) distribution line (second distribution line) 220. It is provided in the vicinity of the pole transformer 40.

本実施の形態の配電自動化システム１０は、主として、配電用サーバ１１０と、監視制御用端末１２０と、分散型電源遠方監視制御装置の親局（以後、分散型電源遠制親局と略称する）１３０と、配電遠制親局１５０とが通信線１６０により相互に通信可能に接続されて構成されたものである。   The distribution automation system 10 according to the present embodiment mainly includes a distribution server 110, a monitoring control terminal 120, and a master station of a distributed power remote monitoring control device (hereinafter abbreviated as a distributed power remote control master station). 130 and the power distribution distance control master station 150 are connected to each other via a communication line 160 so that they can communicate with each other.

配電用サーバ（判別部）１１０は、主として、分散型電源遠制親局１３０や配電遠制親局１５０等を統括管理して制御する機能を有する情報処理装置である。監視制御用端末１２０は、例えば営業所の運転員が配電用サーバ１１０にデータを入力したり、配電用サーバ１１０から出力されたデータを表示したりするための端末である。ここで、分散型電源遠制親局（発信部）１３０は、これに更に接続されたメディア・コンバータ（以後、Ｍ／Ｃと略称する）１４０を通じて、例えば分散型電源３０の運転状態を示す情報信号を受信する機能を有する装置である。また、配電遠制親局１５０は、遠制子局４２に例えば柱上開閉器４１の入り・切りの旨の制御信号を送信する機能を有する装置である。   The power distribution server (discriminating unit) 110 is an information processing apparatus mainly having a function of managing and controlling the distributed power remote control master station 130, the distribution remote control master station 150, and the like. The monitoring control terminal 120 is, for example, a terminal for an operator of a sales office to input data to the power distribution server 110 or display data output from the power distribution server 110. Here, the distributed power remote control master station (transmitting unit) 130, for example, information indicating the operating state of the distributed power supply 30 through a media converter (hereinafter abbreviated as M / C) 140 further connected thereto. A device having a function of receiving a signal. In addition, the power distribution distance control master station 150 is a device having a function of transmitting, to the distance control slave station 42, for example, a control signal for turning on / off the pole switch 41.

本実施の形態の分散型電源３０は、需要家宅内に引き込まれた低圧配電線２３０に対して、遠制子局３１及びＰＬＣモデム３２を介して接続されている。ここで、「ＰＬＣ」とは、電力線通信（Power Line Communication）の略称である。尚、本実施の形態の分散型電源とは、工場やビル、一般住宅等の需要家宅において、例えば太陽光発電システム、風力発電システム、コジェネレ−ション設備等の発電システムを商用電源の配電系統に連系させる電源を意味する。   The distributed power source 30 according to the present embodiment is connected to a low-voltage distribution line 230 drawn into a customer's house via a remote control station 31 and a PLC modem 32. Here, “PLC” is an abbreviation for Power Line Communication. The distributed power source according to the present embodiment refers to a power generation system such as a solar power generation system, a wind power generation system, or a cogeneration facility in a customer's house such as a factory, a building, or a general house. It means the power supply to be connected.

遠制子局（開閉器、生成部）３１は、例えば、分散型電源３０と低圧配電線２３０との間の電力線を遮断又は接続する公知の開閉部（不図示）、分散型電源３０の出力電圧を検出する公知の検出部（不図示）等を備え、これら開閉部や検出部等を制御する機能を有する装置である。   The remote control station (switch, generation unit) 31 is, for example, a known switching unit (not shown) that cuts off or connects the power line between the distributed power source 30 and the low-voltage distribution line 230, and the output of the distributed power source 30. This is a device that includes a known detection unit (not shown) that detects a voltage and has a function of controlling the open / close unit and the detection unit.

ＰＬＣモデム（第３中継器）３２は、前記の開閉部（開閉器、不図示）の動作に応じた入り・切りの旨を示すデータや、前記の検出部（不図示）により検出された出力電圧を示すデータ等を、分散型電源３０の運転状態を示す情報信号として、低圧配電線２３０の電力信号に重畳させる機能を有する伝送モデムである。また、このＰＬＣモデム３２は、後述する需要家宅外に設けられたＰＬＣモデム（第１中継器、第２中継器）３３により情報信号が重畳された電力信号からこれら２つを分離する機能を有する伝送モデムでもある。尚、このＰＬＣモデム３３は、需要家宅内に給電コンセントとして設けられ、例えばこの需要家宅内の通信にも使用し得る一般的なＰＬＣモデムである。   The PLC modem (third repeater) 32 includes data indicating on / off according to the operation of the switch (switch, not shown) and the output detected by the detector (not shown). The transmission modem has a function of superimposing data indicating voltage or the like on the power signal of the low-voltage distribution line 230 as an information signal indicating the operating state of the distributed power source 30. The PLC modem 32 has a function of separating the two from the power signal on which the information signal is superimposed by a PLC modem (first repeater, second repeater) 33 provided outside the customer's house to be described later. It is also a transmission modem. The PLC modem 33 is a general PLC modem that is provided as a power outlet in the customer's house and can be used for communication in the customer's house, for example.

営業所の配電自動化システム１０と、需要家宅のＰＬＣモデム３３とは、このＰＬＣモデム３３側のＭ／Ｃ３４、光通信線３２０、及び電力会社が管轄する通信網３００を介して通信可能に接続されている。このＰＬＣモデム３３は、前述した遠制子局３１の開閉部（不図示）に入り・切りの動作をさせるためのデータや、前述した遠方監視制御装置の検出部（不図示）に分散型電源３０の出力電圧を検出させるためのデータ等を、分散型電源３０に対する制御命令を示す指示信号として、低圧配電線２２０の電力信号に重畳させる機能を有する伝送モデムである。また、このＰＬＣモデム３３は、前述したＰＬＣモデム３２から送信された電力信号と情報信号とを分離する機能を有する伝送モデムでもある。尚、このＰＬＣモデム３３は、需要家宅外に設けられ、前述したＰＬＣモデム３２を子局モデムとして統括する一般的な親局のＰＬＣモデムである。よって、以後、例えばＰＬＣモデム３２といった需要家宅内に設けられる子局のＰＬＣモデムを「ＰＬＣ子局」と略称し、例えばＰＬＣモデム３３といった需要家宅外に設けられる親局のＰＬＣモデムを「ＰＬＣ親局」と略称することとする。 The distribution automation system 10 at the sales office and the PLC modem 33 at the customer's house are communicably connected via the M / C 34 on the PLC modem 33 side, the optical communication line 320, and the communication network 300 under the jurisdiction of the power company. ing. The PLC modem 33, and data for the operation of-cut enters the opening portion of the Toseiko station 31 described above (not shown), distributed to the detecting section of the remote monitor control equipment described above (not shown) The transmission modem has a function of superimposing data for detecting the output voltage of the power supply 30 on the power signal of the low-voltage distribution line 220 as an instruction signal indicating a control command for the distributed power supply 30. The PLC modem 33 is also a transmission modem having a function of separating the power signal and the information signal transmitted from the PLC modem 32 described above. The PLC modem 33 is a general master station PLC modem provided outside the customer's home and supervising the PLC modem 32 described above as a slave station modem. Therefore, hereinafter, the slave station PLC modem provided in the customer's house such as the PLC modem 32 is abbreviated as “PLC slave station”, and the master station PLC modem provided outside the consumer's house such as the PLC modem 33 is referred to as “PLC parent It will be abbreviated as “station”.

尚、本実施の形態では、２つの保安用電話１３０ａ、３１ａが、分散型電源遠制親局１３０及び遠制子局３１にそれぞれ設けられ、光通信線３２０により相互に通信可能に接続されている。この保安用電話１３０ａ、３１ａは、所謂ＩＰ（Internet Protocol）電話である。   In the present embodiment, two security telephones 130a and 31a are provided in the distributed power supply remote control master station 130 and the remote control station 31, respectively, and are connected to each other via an optical communication line 320 so that they can communicate with each other. Yes. The security telephones 130a and 31a are so-called IP (Internet Protocol) telephones.

また、本実施の形態では、ＰＬＣ親局３３は需要家宅外に設けられ、ＰＬＣ子局３２は需要家宅内に設けられているとしているが、これに限定されるものではない。例えば、ＰＬＣ親局３３及びＰＬＣ子局３２が全て需要家宅内に設けられていてもよい。また、ＰＬＣ親局３３は、例えば、柱上変圧器４０の近傍に設けられるものであってもよい。   In the present embodiment, the PLC master station 33 is provided outside the customer's home and the PLC slave station 32 is provided inside the customer's home. However, the present invention is not limited to this. For example, the PLC master station 33 and the PLC slave station 32 may all be provided in the customer's house. Moreover, the PLC master station 33 may be provided in the vicinity of the pole transformer 40, for example.

上記の構成を備えた配電自動化システム１０によれば、例えば、営業所で運転員が、監視制御用端末１２０を通じて、分散型電源３０を配電系統１から解列させる旨を入力すると、この指示信号は光通信線３２０を通じてＰＬＣ親局３３に至る。次に、この指示信号は、ＰＬＣ親局３３で配電系統１からの電力信号に重畳され、低圧配電線２３０を通じて需要家宅内のＰＬＣ子局３２に至る。次に、この指示信号は、ＰＬＣ子局３２で電力信号から分離されて遠制子局３１の開閉部（不図示）に切りの動作を実施させる。次に、分散型電源３０が配電系統１から解列されると、この開閉部（不図示）による切りの旨を示すデータが、情報信号として前記と逆の経路を辿って配電自動化システム１０に至り、監視制御用端末１２０の適宜なディスプレイ（不図示）にその旨が表示される。   According to the distribution automation system 10 having the above-described configuration, for example, when an operator inputs that the distributed power source 30 is disconnected from the distribution system 1 through the monitoring control terminal 120 at the sales office, the instruction signal Reaches the PLC master station 33 through the optical communication line 320. Next, this instruction signal is superimposed on the power signal from the distribution system 1 at the PLC master station 33, and reaches the PLC slave station 32 in the customer's house through the low-voltage distribution line 230. Next, the instruction signal is separated from the power signal by the PLC slave station 32 and causes the switching unit (not shown) of the remote control station 31 to perform a cutting operation. Next, when the distributed power source 30 is disconnected from the distribution system 1, data indicating that the switching unit (not shown) is turned off follows the reverse path as the information signal to the distribution automation system 10. This is displayed on an appropriate display (not shown) of the monitoring control terminal 120.

上記以外にも、電力会社と顧客との間で予め定められた取り決め等に基づいて、配電自動化システム１０から分散型電源３０を制御することが可能である。例えば、分散型電源３０の出力電圧をモニタしつつ当該出力電圧を制御するためには、この分散型電源３０が備えた公知の電圧調整部（不図示）を制御する制御部（不図示）等を、遠制子局３１に対して新たに設ければよい。この制御部（不図示）は、例えば前述した開閉部（不図示）と同様に公知のものである。   In addition to the above, it is possible to control the distributed power source 30 from the distribution automation system 10 based on a predetermined agreement between the power company and the customer. For example, in order to control the output voltage while monitoring the output voltage of the distributed power source 30, a control unit (not shown) for controlling a known voltage adjusting unit (not shown) provided in the distributed power source 30 or the like. May be newly provided for the remote control station 31. This control part (not shown) is a well-known thing like the opening-and-closing part (not shown) mentioned above, for example.

以上から、分散型電源３０と配電系統１との連系状態（例えば、「遮断」又は「接続」、「出力電圧○○Ｖで運転中」等の運転状態を示す情報等）を、配電自動化システム１０から監視できることになる。   From the above, the distribution state between the distributed power source 30 and the distribution system 1 (for example, information indicating the operation state such as “cut off” or “connection”, “operating at output voltage OOV”, etc.) is automatically distributed. It can be monitored from the system 10.

＝＝＝連系状態を監視可能且つ電力需要側に負担をかけない配電制御装置＝＝＝
前述した構成を備えた配電自動化システム１０は、以下述べる理由から、低コストのシステムとなる。 === Distribution control device that can monitor the interconnection state and does not place a burden on the power demand side ===
The distribution automation system 10 having the above-described configuration is a low-cost system for the reasons described below.

図２を参照しつつ、需要家宅におけるＰＬＣ親局及びＰＬＣ子局のもう一つの構成例について説明する。同図は、本実施の形態の分散型電源とその周辺装置とのもう一つの接続例を示すブロック図である。   With reference to FIG. 2, another configuration example of the PLC master station and the PLC slave station in the customer's house will be described. This figure is a block diagram showing another example of connection between the distributed power supply of this embodiment and its peripheral devices.

図２の例示は、図１のＰＬＣ子局３２が複数のＰＬＣ子局（例えば、ＰＬＣ子局３２１、３２２、３２３等）から構成されていることを意味している。これら複数のＰＬＣ子局３２１、３２２、３２３は、需要家宅内の給電用及び通信用として使用可能な一般的な伝送モデムである。例えば、ＰＬＣ子局３２１には図１の場合と同様に分散型電源３０が接続される一方、他のＰＬＣ子局３２２、３２３には情報通信機器等の負荷８０２、８０３が接続可能である。これらの情報通信機器８０２、８０３は、ＰＬＣ親局３３１の下、需要家宅内の低圧配電線２３０’を通じて相互に通信可能である。   The illustration of FIG. 2 means that the PLC slave station 32 of FIG. 1 is composed of a plurality of PLC slave stations (for example, PLC slave stations 321, 322, 323, etc.). The plurality of PLC slave stations 321, 322, and 323 are general transmission modems that can be used for power supply and communication in a customer's house. For example, while the distributed power source 30 is connected to the PLC slave station 321 as in the case of FIG. 1, loads 802 and 803 such as information communication devices can be connected to the other PLC slave stations 322 and 323. These information communication devices 802 and 803 can communicate with each other through the low voltage distribution line 230 ′ in the customer's house under the PLC master station 331.

これにより、例えば、需要家宅に分散型電源を新設し、これを配電系統１に新規に連系させる場合、例えば情報通信機器等の予備としてこの需要家宅内に既に設けられているＰＬＣ子局を用いればよい。本実施の形態では、このＰＬＣ子局や光通信線等は、分散型電源を監視する専用のものではなく一般的なものである。よって、例えば、特開２００１−２９８８６５号公報に開示された次数間高調波生成部等を組み込むべく分散型電源を改造したり、分散型電源の監視結果を送信すべく専用の通信線を新規に設けたりする必要がないため、低コストという点で、電力会社は顧客に負担をかけないことになる。尚、もし予備のＰＬＣ子局が無い場合でも、ＰＬＣ親局に対してＰＬＣ子局を増設することは容易であり、専用の通信線を新規に開設することに比べて低コストで済む。   Thus, for example, when a distributed power source is newly installed in a customer's house and this is newly connected to the power distribution system 1, for example, a PLC slave station already installed in the customer's house as a spare for information communication equipment or the like is used. Use it. In this embodiment, the PLC slave station, the optical communication line, and the like are general, not dedicated for monitoring the distributed power source. Therefore, for example, a distributed power source is modified to incorporate the inter-order harmonic generation unit disclosed in Japanese Patent Laid-Open No. 2001-298865, or a dedicated communication line is newly added to transmit the monitoring result of the distributed power source. Since there is no need to provide it, the power company does not place a burden on the customer in terms of low cost. Even if there is no spare PLC slave station, it is easy to add a PLC slave station to the PLC master station, and the cost can be reduced compared to newly opening a dedicated communication line.

＝＝＝複数の需要家宅に分散された複数の分散型電源の監視＝＝＝
前述した実施の形態では、１つの配電自動化システム１０により、１つの需要家宅に設けられた１つの分散型電源３０が監視されているとしたが、これに限定されるものではない。以下、図３（ａ）を参照しつつ、配電自動化システムと、需要家宅における複数の分散型電源との接続例について説明する。同図は、本実施の形態の配電自動化システム１０’の構成例、及びこれと周辺装置との接続例を示すもう一つのブロック図である。 === Monitoring of a plurality of distributed power sources distributed in a plurality of customer homes ===
In the above-described embodiment, one distributed power source 30 provided in one customer's house is monitored by one distribution automation system 10, but the present invention is not limited to this. Hereinafter, a connection example between the distribution automation system and a plurality of distributed power sources in a customer's house will be described with reference to FIG. This figure is another block diagram showing a configuration example of the power distribution automation system 10 ′ of the present embodiment and a connection example between the system and peripheral devices.

図３（ａ）に例示された配電自動化システム１０’は、図１の配電自動化システム１０に加えて、複数のＰＬＣ親局のそれぞれについてのデータベース（例えば親モデムデータベース１７１、１７２）を管理するデータベース管理サーバ１７０が通信線１６０を介して更に接続されたものである。このデータベース管理サーバ１７０は、親モデムデータベース１７１、１７２におけるデータの入出力を制御する機能を有する情報処理装置である。   The distribution automation system 10 ′ illustrated in FIG. 3A is a database that manages a database (for example, parent modem databases 171 and 172) for each of a plurality of PLC master stations in addition to the distribution automation system 10 of FIG. A management server 170 is further connected via a communication line 160. The database management server 170 is an information processing apparatus having a function of controlling data input / output in the parent modem databases 171 and 172.

親モデムデータベースは、配電自動化システム１０’が監視する複数の分散型電源が複数の需要家宅に渡り分散している場合、これら分散型電源を需要家宅毎に記憶するデータベースである。具体的には、各需要家宅は、そこに設けられたＰＬＣ親局（例えば、ＰＬＣ親局３３１）により識別する。また、分散型電源は、或るＰＬＣ親局の下でのＰＬＣ子局（例えば、ＰＬＣ子局３２１、３２２、３２３）により識別する。この識別を以下具体的に説明する。   When a plurality of distributed power sources monitored by the distribution automation system 10 'are distributed over a plurality of customer homes, the parent modem database is a database that stores these distributed power sources for each customer home. Specifically, each customer's house is identified by a PLC master station (for example, PLC master station 331) provided there. The distributed power source is identified by a PLC slave station (for example, PLC slave stations 321, 322, and 323) under a certain PLC master station. This identification will be specifically described below.

１つの需要家宅外に設けられたＰＬＣ親局３３１に対して、当該需要家宅内で、複数のＰＬＣ子局３２１、３２２、３２３が接続され、更に分散型電源３０１（以後、分散型電源Ａと称する）、分散型電源３０２（以後、分散型電源Ｂと称する）、分散型電源３０３（以後、分散型電源Ｃと称する）がそれぞれ接続されている。一方、配電自動化システム１０’の親モデムデータベース１７１は、例えばＰＬＣ親局３３１に対応する子モデムデータ１７１ａを記憶している（第１記憶部、第２記憶部）。この子モデムデータ１７１ａは、上記の複数の分散型電源Ａ、Ｂ、Ｃを示す情報に、複数のＰＬＣ子局３２１、３２２、３２３を示す情報をそれぞれ対応付けたものである（図３（ｂ）参照）。尚、図３（ｂ）は、需要家宅内の複数の分散型電源と該当のＰＬＣ子局との対応例を示す図表である。   A plurality of PLC slave stations 321, 322, and 323 are connected to a PLC master station 331 provided outside one customer's house in the customer's house, and a distributed power source 301 (hereinafter referred to as a distributed power source A). Distributed power source 302 (hereinafter referred to as distributed power source B) and distributed power source 303 (hereinafter referred to as distributed power source C) are connected to each other. On the other hand, the parent modem database 171 of the distribution automation system 10 ′ stores, for example, child modem data 171 a corresponding to the PLC master station 331 (first storage unit, second storage unit). The child modem data 171a is obtained by associating information indicating the plurality of distributed power sources A, B, and C with information indicating the plurality of PLC slave stations 321, 322, and 323, respectively (FIG. 3B). )reference). FIG. 3B is a chart showing a correspondence example between a plurality of distributed power sources in the customer's house and the corresponding PLC slave station.

以上から、例えば配電用サーバ１１０が、データベース管理サーバ１７０を通じて、親モデムデータベース１７１、１７２を参照することにより、ＰＬＣ親局３３１及びＰＬＣ子局３２１、３２２、３２３を介して、各分散型電源Ａ、Ｂ、Ｃを識別できる。よって、本実施の形態の配電自動化システム１０’は、複数の需要家宅に渡り分散された複数の分散型電源を個別に監視できる。   From the above, for example, when the power distribution server 110 refers to the parent modem databases 171 and 172 through the database management server 170, each distributed power source A is connected via the PLC master station 331 and the PLC slave stations 321, 322, and 323. , B, C can be identified. Therefore, the power distribution automation system 10 ′ of the present embodiment can individually monitor a plurality of distributed power sources distributed over a plurality of customer homes.

例えば、配電自動化システム１０’からの遠隔操作により、分散型電源Ａを低圧配電線２２０から遮断し、実際に遮断された旨を確認する場合の配電用サーバ１１０の動作手順について説明する。   For example, an operation procedure of the power distribution server 110 when the distributed power source A is disconnected from the low-voltage distribution line 220 by remote operation from the distribution automation system 10 'and it is confirmed that the distribution has been actually interrupted will be described.

先ず、監視制御用端末１２０を通じて或る需要家宅の分散型電源Ａの遮断の旨のデータが入力されると、配電用サーバ１１０は、この需要家宅に該当するＰＬＣ親局３３１の親モデムデータベース（第２記憶部）１７１に記憶された子モデムデータ１７１ａを参照し、分散型電源Ａに対応付けられたＰＬＣ子局３２１を示す情報（第２識別情報）を取得する。次に、配電用サーバ１１０は、遮断の旨の指示信号に対してこのＰＬＣ子局３２１を示す情報を付帯させ、これをＰＬＣ親局３３１へ送信する。この指示信号は、ＰＬＣ親局３３１により、分散型電源Ａが接続されているＰＬＣ子局３２１に振り分けられる。   First, when data indicating that the distributed power source A of a certain customer's house is shut off is input through the monitoring control terminal 120, the power distribution server 110 transmits the parent modem database (in the PLC master station 331 corresponding to this consumer's house). Reference is made to the child modem data 171a stored in the second storage unit 171 to obtain information (second identification information) indicating the PLC slave station 321 associated with the distributed power source A. Next, the power distribution server 110 attaches information indicating the PLC slave station 321 to the instruction signal indicating the cutoff, and transmits the information to the PLC master station 331. This instruction signal is distributed by the PLC master station 331 to the PLC slave station 321 to which the distributed power source A is connected.

次に、分散型電源Ａが低圧配電線２２０から遮断されると、ＰＬＣ子局３２１により、この遮断の旨の情報信号に対してこのＰＬＣ子局３２１を示す情報（第１識別情報）が付帯され、ＰＬＣ親局３３１を通じて、配電用サーバ１１０まで送信される。配電用サーバ１１０は、この情報信号を受信すると、ＰＬＣ親局３３１に該当する親モデムデータベース（第１記憶部）１７１に記憶された子モデムデータ１７１ａを参照することにより、分散型電源Ａを特定できる。   Next, when the distributed power source A is disconnected from the low-voltage distribution line 220, the PLC slave station 321 adds information (first identification information) indicating the PLC slave station 321 to the information signal indicating the cutoff. Then, it is transmitted to the distribution server 110 through the PLC master station 331. Upon receiving this information signal, the distribution server 110 identifies the distributed power source A by referring to the child modem data 171a stored in the parent modem database (first storage unit) 171 corresponding to the PLC master station 331. it can.

前述したように、本実施の形態では、例えば電力会社と顧客との間で予め定められた取り決め等に基づいて、配電自動化システム１０、１０’から分散型電源３０を制御することが可能である。よって、例えば、顧客の分散型電源が配電系統に連系されているか否かを確認でき、従って系統操作や停電作業等を安全に実施できるとともに、配電線電圧を基準値内に収め易くできる。また、例えば、電力会社の配電系統１に対する顧客の分散型電源の連系容量を増加させることができ、従って電力会社の設備投資の抑制を図ることができる。この連系容量の増加が太陽光や風力等の自然エネルギーによるものであれば、これは二酸化炭素ガス排出量の削減にもつながり、環境問題の解決に貢献する。更に、例えば、配電線電圧を基準値内で高め運用することにより、配電線送電容量を増加させ、配電線のより効率的な運用が可能である。   As described above, in the present embodiment, it is possible to control the distributed power supply 30 from the power distribution automation system 10, 10 ′ based on, for example, a predetermined agreement between the power company and the customer. . Therefore, for example, it is possible to confirm whether or not the customer's distributed power supply is linked to the distribution system, and thus it is possible to safely perform system operation, power outage work, and the like, and to easily keep the distribution line voltage within the reference value. Further, for example, it is possible to increase the interconnection capacity of the customer's distributed power supply with respect to the power distribution system 1 of the power company, and thus it is possible to reduce the capital investment of the power company. If this increase in interconnection capacity is due to natural energy such as sunlight and wind power, this will lead to a reduction in carbon dioxide gas emissions and contribute to solving environmental problems. Furthermore, for example, by operating the distribution line voltage within the reference value, the distribution line transmission capacity can be increased, and the distribution line can be operated more efficiently.

前述した実施の形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく変更、改良されるとともに、本発明にはその等価物も含まれる。   The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention is changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

本実施の形態の配電自動化システムの構成例、及びこれと周辺装置との接続例を示すブロック図である。It is a block diagram which shows the structural example of the power distribution automation system of this Embodiment, and the example of a connection with this and a peripheral device. 本実施の形態の分散型電源とその周辺装置とのもう一つの接続例を示すブロック図である。It is a block diagram which shows another example of a connection of the distributed power supply of this Embodiment, and its peripheral device. （ａ）は、本実施の形態の配電自動化システムの構成例、及びこれと周辺装置との接続例を示すもう一つのブロック図であり、（ｂ）は、需要家宅内の複数の分散型電源と該当のＰＬＣ子局との対応例を示す図表である。(A) is another block diagram which shows the example of a structure of the power distribution automation system of this Embodiment, and the connection example of this and a peripheral device, (b) is the some distributed power supply in a consumer's house. It is a graph which shows the example of a response | compatibility with the applicable PLC slave station. 従来の配電自動化システムの構成例、及びこれと周辺装置との接続例を示すブロック図である。It is a block diagram which shows the structural example of the conventional power distribution automation system, and the example of a connection with this and a peripheral device.

符号の説明Explanation of symbols

１０、１０’ 配電自動化システム
２０ 変電所
３０、３０１、３０２、３０３ 分散型電源
３１、４２、３１１、３１２、３１３ 遠制子局
３１ａ、１３０ａ、３１１ａ、３１２ａ、３１３ａ 保安用電話
３２、３２１、３２２、３２３ ＰＬＣモデム（ＰＬＣ子局）
３３、３３１ ＰＬＣモデム（ＰＬＣ親局）
３４、１４０ Ｍ／Ｃ
４０ 柱上変圧器
４１ 柱上開閉器
１１０ 配電用サーバ
１２０ 監視制御用端末
１３０ 分散型電源遠制親局
１５０ 配電遠制親局
１６０ 通信線
１７０ データベース管理サーバ
１７１、１７２ 親モデムデータベース
１７１ａ、１７２ａ 子モデムデータ
２１０ 高圧配電線
２２０、２３０、２３０’ 低圧配電線
３００ 通信網
３１０、３２０ 光通信線
８０２、８０３ 負荷 10, 10 ′ Distribution automation system 20 Substation 30, 301, 302, 303 Distributed power supply 31, 42, 311, 312, 313 Remote control station 31a, 130a, 311a, 312a, 313a Security telephone 32, 321, 322 323 PLC modem (PLC slave station)
33,331 PLC modem (PLC master station)
34, 140 M / C
40 Pillar transformer 41 Pillar switch 110 Distribution server 120 Monitoring control terminal 130 Distributed power remote control master station 150 Distribution remote control master station 160 Communication line 170 Database management server 171, 172 Parent modem database 171a, 172a Child Modem data 210 High voltage distribution line 220, 230, 230 'Low voltage distribution line 300 Communication network 310, 320 Optical communication line 802, 803 Load

Claims (10)

第１電圧を送電する第１配電線から分岐するとともに前記第１電圧より低い第２電圧を送電する第２配電線に対して、分散型電源が接続又は遮断されることを監視する配電制御装置であって、
前記第２配電線の電力信号に前記分散型電源が接続又は遮断されたことを示す情報信号が重畳されている場合、当該情報信号を分離する第１中継器と、
前記第１中継器によって分離された情報信号を受信し、前記分散型電源が前記第２配電線に対して接続又は遮断の何れの状態であるのかを判別する判別部と、
を備え、
前記第１中継器は、前記第２配電線の電力信号に重畳された情報信号を分離するＰＬＣ（Power Line Communication）モデムであることを特徴とする配電制御装置。 A distribution control device that monitors whether a distributed power source is connected to or disconnected from a second distribution line that branches from the first distribution line that transmits the first voltage and transmits a second voltage lower than the first voltage. Because
A first repeater for separating the information signal when the information signal indicating that the distributed power source is connected or disconnected is superimposed on the power signal of the second distribution line;
A determination unit that receives the information signal separated by the first repeater and determines whether the distributed power source is connected to or disconnected from the second distribution line;
Equipped with a,
The power distribution control device according to claim 1, wherein the first repeater is a PLC (Power Line Communication) modem that separates an information signal superimposed on a power signal of the second distribution line . 前記分散型電源が前記第２配電線に対して接続又は遮断されることを指示する指示信号を発信する発信部と、
前記第２配電線の電力信号に前記発信部から発信された指示信号を重畳させる第２中継器と、を更に備え、
前記第２中継器は、前記第２配電線の電力信号に前記指示信号を重畳させるＰＬＣ（Power Line Communication）モデムであり、
前記第２配電線の電力信号に重畳された指示信号に基づいて、前記分散型電源が前記第２配電線に対して接続又は遮断の何れかの状態に設定された後、前記第２配電線の電力信号に前記判別部が判別するための情報信号が重畳される、
ことを特徴とする請求項１に記載の配電制御装置。 A transmitter for transmitting an instruction signal instructing that the distributed power source is connected to or disconnected from the second distribution line;
A second repeater that superimposes the instruction signal transmitted from the transmitter on the power signal of the second distribution line, and
The second repeater is a PLC (Power Line Communication) modem that superimposes the instruction signal on the power signal of the second distribution line,
Based on the instruction signal superimposed on the power signal of the second distribution line, after the distributed power source is set to either the connected or disconnected state with respect to the second distribution line, the second distribution line An information signal for the determination unit to determine is superimposed on the power signal of
The power distribution control device according to claim 1. 前記第２配電線の電力信号に重畳される情報信号は、前記分散型電源の出力電圧を示す情報を、更に有することを特徴とする請求項１に記載の配電制御装置。   The power distribution control device according to claim 1, wherein the information signal superimposed on the power signal of the second distribution line further includes information indicating an output voltage of the distributed power source. 前記第２配電線の電力信号に重畳される指示信号は、前記分散型電源の出力電圧を設定する情報を、更に有することを特徴とする請求項２に記載の配電制御装置。 The power distribution control device according to claim 2 , wherein the instruction signal superimposed on the power signal of the second distribution line further includes information for setting an output voltage of the distributed power source. 前記第１中継器は、複数の前記分散型電源が如何なる状態であるかを示す複数の前記情報信号を、前記判別部に送信し、
複数の前記情報信号は各々、複数の前記分散型電源の何れの信号であるのかを示す情報を含み、
前記情報信号が複数の前記分散型電源の何れの信号であるのかを前記判別部が判別する際に用いる、前記情報に対応する第１識別情報が記憶された第１記憶部、を更に備えたことを特徴とする請求項１又は３に記載の配電制御装置。 The first repeater transmits a plurality of the information signals indicating the state of the plurality of distributed power sources to the determination unit,
Each of the plurality of information signals includes information indicating which of the plurality of distributed power sources is a signal.
A first storage unit storing first identification information corresponding to the information, which is used when the determination unit determines which of the plurality of distributed power sources the information signal is; The power distribution control device according to claim 1 or 3. 前記第２中継器は、複数の前記分散型電源の状態を設定するための複数の前記指示信号を出力し、
複数の前記指示信号は各々、複数の前記分散型電源の何れの信号であるのかを示す第２識別情報を含み、
前記発信部が前記指示信号を送信する際に用いる前記第２識別情報が記憶された第２記憶部、を更に備えたことを特徴とする請求項２又は４に記載の配電制御装置。 The second repeater outputs a plurality of the instruction signals for setting a plurality of distributed power supply states,
Each of the plurality of instruction signals includes second identification information indicating which signal of the plurality of distributed power sources,
Power distribution control device according to claim 2 or 4, characterized in that said transmission unit is a second storage portion in which the second identification information used for transmitting the instruction signal is stored, further comprising a. 前記第１中継器及び前記第２中継器と前記分散型電源との間には、
前記第１中継器が前記第２配電線の電力信号から分離すべき情報信号を当該電力信号に重畳させるか、又は、前記第２中継器が前記第２配電線の電力信号に重畳させた指示信号を当該電力信号から分離する第３中継器と、
前記第３中継器から得られる指示信号に応じて、前記第２配電線と前記分散型電源とを接続又は遮断する開閉器と、
前記第３中継器が前記第２配電線の電力信号に重畳すべき情報信号を生成する生成部と、
が設けられ、
前記第３中継器は、前記第２配電線の電力信号に重畳された情報信号を分離し、且つ、前記第２配電線の電力信号に前記指示信号を重畳させるＰＬＣ（Power Line Communication）モデムである、ことを特徴とする請求項２、４又は６の何れかに記載の配電制御装置。 Between the first repeater and the second repeater and the distributed power source,
Instruction that the first repeater superimposes the information signal to be separated from the power signal of the second distribution line on the power signal, or the second repeater superimposes on the power signal of the second distribution line A third repeater for separating the signal from the power signal;
A switch for connecting or disconnecting the second distribution line and the distributed power source in accordance with an instruction signal obtained from the third repeater;
A generator for generating an information signal to be superimposed on the power signal of the second distribution line by the third repeater;
Is provided ,
The third repeater is a PLC (Power Line Communication) modem that separates the information signal superimposed on the power signal of the second distribution line and superimposes the instruction signal on the power signal of the second distribution line. Oh Ru, power distribution control device according to claim 2, 4 or 6, characterized in that. 前記第１中継器及び前記第２中継器は親局であり、
前記第３中継器は家屋に設けられた子局である、ことを特徴とする請求項７に記載の配電制御装置。 The first repeater and the second repeater are master stations,
The power distribution control device according to claim 7 , wherein the third repeater is a slave station provided in a house. 第１電圧を送電する第１配電線から分岐するとともに前記第１電圧より低い第２電圧を送電する第２配電線に対して、分散型電源が接続又は遮断されることを監視する配電制御装置の監視方法であって、
前記第２配電線の電力信号に前記分散型電源が接続又は遮断されたことを示す情報信号が重畳されている場合、当該情報信号を、前記第２配電線の電力信号に重畳された情報信号を分離するＰＬＣ（Power Line Communication）モデムにより分離する分離ステップと、
前記分離ステップにおいて分離された情報信号を受信し、前記分散型電源が前記第２配電線に対して接続又は遮断の何れの状態であるのかを判別する判別ステップと、
を備えたことを特徴とする配電制御装置の監視方法。 A distribution control device that monitors whether a distributed power source is connected to or disconnected from a second distribution line that branches from the first distribution line that transmits the first voltage and transmits a second voltage lower than the first voltage. Monitoring method,
If the information signal indicating the that the dispersed type power supply is connected or cut off power signal of the second distribution line is superimposed, the information signal to the information signal, is superimposed on the power signal of the second distribution line A separation step of separating by a PLC (Power Line Communication) modem for separating
A determination step of receiving the information signal separated in the separation step, and determining whether the distributed power source is connected or disconnected with respect to the second distribution line;
A method for monitoring a power distribution control device comprising: 前記分散型電源が前記第２配電線に対して接続又は遮断されることを指示する指示信号を発信する発信ステップと、
前記第２配電線の電力信号に前記発信部から発信された指示信号を、前記第２配電線の電力信号に前記指示信号を重畳させるＰＬＣ（Power Line Communication）モデムにより重畳する第１の重畳ステップと、
前記第２配電線の電力信号に重畳された指示信号に基づいて、前記分散型電源が前記第２配電線に対して接続又は遮断の何れかの状態に設定された後、前記第２配電線の電力信号に前記判別ステップにおいて判別するための情報信号を重畳する第２の重畳ステップと、
を更に備えたことを特徴とする請求項９に記載の配電制御装置の監視方法。 A transmission step of transmitting an instruction signal instructing that the distributed power source is connected to or disconnected from the second distribution line;
An instruction signal transmitted from the transmitter unit to the power signal of the second distribution line, a first superimposing step of superimposing the PLC (Power Line Communication) modem for superimposing the instruction signal to the power signal of the second distribution line When,
Based on the instruction signal superimposed on the power signal of the second distribution line, after the distributed power source is set to either the connected or disconnected state with respect to the second distribution line, the second distribution line A second superposition step of superimposing an information signal for discrimination in the discrimination step on the power signal of
The power distribution control device monitoring method according to claim 9 , further comprising:
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