JP2007068288A - Power supply system - Google Patents

Power supply system Download PDF

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JP2007068288A
JP2007068288A JP2005249280A JP2005249280A JP2007068288A JP 2007068288 A JP2007068288 A JP 2007068288A JP 2005249280 A JP2005249280 A JP 2005249280A JP 2005249280 A JP2005249280 A JP 2005249280A JP 2007068288 A JP2007068288 A JP 2007068288A
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power
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electric power
company
electric
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JP4650170B2 (en
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Shinsuke Nii
真介 仁井
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply system wherein if an interruption in power supply occurs in the power generating installation of a specific electrical power supplier, power the customers of the specific electric power supplier need can be reliably ensured at low cost and stably supplied to the customers. <P>SOLUTION: If an interruption in power supply occurs in a specific electrical power supplier, a power producer and supplier 10 utilizes the generators 31 for emergency at its customers 30 to supply supplementary power to the specific electrical power supplier. Thus, in an accident, supplementary power can be ensured without newly investing in equipment. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、特定規模電気事業者から需要家に対して電力を供給するようにした電力供給システムに関するものであり、特に電力供給障害発生時の電力供給を設備投資なく実現することのできる電力供給システムに関するものである。   The present invention relates to a power supply system configured to supply power to a consumer from a specific scale electric power company, and in particular, power supply capable of realizing power supply when a power supply failure occurs without capital investment. It is about the system.

電力の自由化により、従来の一般電気事業者（電力会社）だけでなく、電力の供給を特別高圧の電力使用者（需要家）に行う目的で、新たな事業者、すなわち特定規模電気事業者が電力の販売を行っている（例えば、特許文献1参照）。
図３は、特許文献１に記載された電力制御・管理システムの全体的な構成を示すブロック図である。図３において、3は一般電気事業者、10は特定規模電気事業者、30は特別高圧の需要家、40は発電事業者である。一般電気事業者3は発電設備4を所有しており、この発電設備4の電力が電力系統１を介して需要家30の負荷32に供給される。
いくつかの需要家30は、非常用の自家発電設備として、負荷32に対して電力を供給するための非常用発電機31を所有している。この非常用発電機31は、消防法や建築基準法に基づいて設置される場合があり、通常は待機状態にあるため設備の使用効率は極めて低い。 With the liberalization of electric power, not only conventional general electric power companies (electric power companies) but also new electric power companies, that is, specific-scale electric power companies, for the purpose of supplying electric power to special high voltage electric power users (customers) Sells electricity (see, for example, Patent Document 1).
FIG. 3 is a block diagram showing the overall configuration of the power control / management system described in Patent Document 1. As shown in FIG. In FIG. 3, 3 is a general electric company, 10 is a specific scale electric company, 30 is a special high voltage consumer, and 40 is a power generation company. The general electric utility 3 owns the power generation facility 4, and the electric power of the power generation facility 4 is supplied to the load 32 of the customer 30 through the power system 1.
Some customers 30 have an emergency generator 31 for supplying power to a load 32 as an emergency private power generation facility. The emergency generator 31 may be installed based on the Fire Service Law or the Building Standard Law, and is normally in a standby state, so the use efficiency of the facility is extremely low.

発電事業者40は、発電設備41を所有しており、この発電設備41の余剰電力は、特定規模電気事業者10に購入される形で電力系統１に供給される。なお、余剰電力だけでなく、特定規模電気事業者10からの電力補充の要請で電力系統１に供給される場合もある。さらに、特定規模電気事業者10は発電設備を所有し、電力系統１に電力を供給する形態もある。
電力系統１は、特定規模電気事業者10とは異なる他者、例えば一般電気事業者3が所有する設備であるが、特定規模電気事業者10が一般電気事業者3に送電を委託することにより、特定規模電気事業者10が発電事業者40から購入した電力が、需要家30に直接的に供給される。
このような構成において、特定規模電気事業者10は、各発電事業者40と電力を購入する契約を交わし、その購入した電力を各需要家30に販売する契約を各需要家30と交わすと共に、電力系統１の所有者である一般電気事業者3との間で送電委託及び電力補充の契約を締結している。また、特定規模電気事業者10は、一般電気事業者3との間には、需要家30に対する供給電力が不足する場合に、一般電気事業者3から電力補充を受けることについて契約を締結している。 The power generation company 40 has a power generation facility 41, and surplus power of the power generation facility 41 is supplied to the power system 1 in a form purchased by the specific scale electric power company 10. In addition to the surplus power, there is a case where it is supplied to the power system 1 in response to a request for supplementation of power from the specific scale electric power company 10. Furthermore, the specific scale electric power company 10 has a power generation facility and supplies power to the power system 1.
The electric power system 1 is a facility owned by another person different from the specific-scale electric power company 10, for example, the general electric power company 3, but the specific-scale electric power company 10 entrusts the general electric power company 3 to transmit power. The electric power purchased by the specific scale electric power company 10 from the power generation company 40 is directly supplied to the consumer 30.
In such a configuration, the specific-scale electric power company 10 makes a contract to purchase electric power with each power generation company 40, and makes a contract to sell the purchased electric power to each customer 30 with each customer 30. We have signed a contract for power transmission and replenishment with the general electric utility 3 who is the owner of the power grid 1. In addition, the specified-scale electric power company 10 has signed a contract with the general electric power company 3 to receive power supplement from the general electric power company 3 when the power supplied to the customer 30 is insufficient. Yes.

特定規模電気事業者10は、通信ネットワーク２を介して一般電気事業者3、需要家30、発電事業者40に設けられている各端末（図示せず）に接続されるサーバ11を所有しており、サーバ11は、通信ネットワーク２を介して各種の必要な情報を収集して分析および解析し、その結果を基に、一般電気事業者3、需要家30、発電事業者40及び特定規模電気事業者10自身に運転指令を出す。これにより、電力系統１における電力供給と電力使用との需給バランスを監視し、電力系統1における系統制御を低廉な価格で最適に行っている。
さらに、最近では一般電気事業者、特定規模電気事業者とは異なる電気事業者、すなわち特定電気事業者が特定の供給地点における需要に応じて電力の供給を行っている。この特定電気事業者は、当該事業における需要家の電力を全量供給すると同時に、自己の発電設備の障害時の補給電力を確保する義務を有している。このため、特定電気事業者は、一般電気事業者（電力会社）と自家発補給契約を締結し、障害時の補給電力を確保している。
特開２００３−３２８９９号公報 The specific scale electric power company 10 has a server 11 connected to each terminal (not shown) provided to the general electric power company 3, the customer 30, and the power generation company 40 via the communication network 2. The server 11 collects, analyzes and analyzes various necessary information via the communication network 2, and based on the results, the general electric utility 3, the customer 30, the power generation enterprise 40, and the specified scale electricity Issue a driving order to the operator 10 itself. As a result, the supply and demand balance between power supply and power use in the power system 1 is monitored, and system control in the power system 1 is optimally performed at a low price.
Furthermore, recently, an electric power company different from a general electric power company and a specific scale electric power company, that is, a specific electric power company supplies electric power according to demand at a specific supply point. This specific electric power company is obligated to supply the entire amount of electric power of the customer in the business, and at the same time to secure supplementary power in the event of a failure of its own power generation equipment. For this reason, the specified electric power company has concluded a self-supplied replenishment contract with a general electric power company (electric power company), and secures replenished power at the time of failure.
JP 2003-32899 A

この補給電力に対処するため、一般電気事業者は、障害時補給電力を確保するための発電機予備力を維持する必要がある。さらに、一般電気事業者と特定電気事業者との間の自家発補給電力の契約では、通常運転時は系統に接続するだけで電力の授受は行わないが、発電予備力の設備維持のための高額の接続料が特定電気事業者の負担となっている。
本発明は、上記に鑑み、一般電気事業者が事故時補給電力を確保するための発電機予力を維持することがなく、特定電気事業者が自己所有の発電設備の障害時にも補給電力を確保することのできる電力供給システムを提供することを目的とする。 In order to cope with this supplementary power, general electric utilities need to maintain a generator reserve for securing supplementary power in the event of a failure. In addition, in the contract of self-supplied power between a general electric utility and a specific electric utility, during normal operation, it is only connected to the grid and does not transfer power. High connection charges are a burden on specified electric utilities.
In view of the above, the present invention does not maintain a generator reserve to ensure that a general electric utility secures supplementary power in the event of an accident. An object is to provide a power supply system that can be secured.

本発明は、特定規模電気事業者が需要家の非常用発電設備により発電予備電力を確保するものであり、正常運転時においては、特定電気事業者は自社の自家用発電設備で当該事業の需要家へ電力を供給している。特定電気事業者の発電設備に供給障害が発生すると、特定規模電気事業者は特定電気事業者に補給電力を供給する。特定規模電気事業者は、自社の設備容量を越える電力の供給が必要となった場合、需要家の非常用自家発電設備を運転することで需要家への供給量を低減し、特定電気事業者への自家発補給電力を確保する。
これにより、特定規模電気事業者の設備容量を越えない範囲で、当該事業の需要家への電力と特定電気事業者の自家発補給電力を供給することが可能となる。 According to the present invention, a specific-scale electric power company secures power generation reserve power by a customer's emergency power generation facility, and during normal operation, the specific electric power company uses its own power generation facility to Is supplying power. When a supply failure occurs in a power generation facility of a specific electric power company, the specific electric power company supplies supplementary power to the specific electric power company. Specified-scale electric utilities reduce the amount of supply to consumers by operating their own emergency power generation facilities when it is necessary to supply more power than their own capacity. Secure self-supplied power for
As a result, it is possible to supply electric power to consumers of the business and self-supplied electric power of the specific electric power company within a range that does not exceed the installed capacity of the specific electric power company.

特定規模電気事業者は、当該電力使用者である特別高圧の需要家に加えて、新たに特定電気事業者に自家発補給電力供給という事業の拡大が可能となる。
特定規模電気事業者は、特定電気事業者への補給電力供給のために、発電予備力を確保するために新たな設備投資をしないので、補給電力供給契約において一般電気事業者よりも低廉な価格での契約が可能である。
一方、需要家においては、従来、非常用発電設備は使用待機状態にあり利益を生まない設備であるが、補給電力供給のための発電予備力として特定規模電気事業者と契約することで、利益を生ずることが可能になる。また、需要家が特定電気事業者と補給電力供給契約を直接結ぶ場合は、電力系統側へ電力を逆潮することになるため、一般電気事業者との系統連系の協議が必要であり、系統連系のための設備追加ならびに運用が必要となり、低廉な価格の電力供給の観点から現実的とは言えない。 In addition to the special high voltage consumer who is the electric power user, the specific scale electric power company can newly expand the business of supplying self-supplied electric power to the specific electric power company.
Specified-scale electric utilities do not make new capital investments to secure power generation reserves in order to supply supplementary power to specified electric utilities. A contract can be made at
On the other hand, in the past, emergency power generation facilities have been in standby status and do not produce profits. However, profits can be gained by contracting with a specific-scale electric power company as a power reserve for supplying supplementary power. Can be generated. In addition, when a customer directly makes a supplementary power supply contract with a specified electric power company, the power will flow back to the power system side, so it is necessary to discuss grid connection with a general electric power company. It is not realistic from the viewpoint of low-priced power supply because it requires additional equipment and operation for grid interconnection.

これに対し、特定規模電気事業者が介在すると、特定規模電気事業者からの電力供給を受けながら逆潮しない範囲で自家発電力を利用するので、逆潮なしとすることができる。これにより、特定電気事業者と一般電気事業者との間は通常の自家発連系協議の範囲で系統連系が可能となる。   On the other hand, when a specific-scale electric power company is interposed, self-generated power is used within a range that does not reverse power while receiving power supply from the specific-scale electric power company, so that no reverse power can be generated. As a result, the grid connection between the specific electric power company and the general electric power company is possible within the range of the normal self-initiated connection discussion.

以下、本発明の実施の形態を図１、図２に基づいて説明する。
図１は特定電気事業者に電力供給障害が発生した時の電力供給経路を説明するための全体構成図、図２は特定電気事業者が正常に電力供給を行っている時の電力供給経路を説明するための全体構成図である。
図１、図２において、図３と同じ構成要素には同じ符号が付与されているが、特定電気事業者20が電力系統１に接続されている点が図３と相違している。なお、図３に記載されている一般電気事業者３、発電事業者40が図1では省略されているが、実際には電力系統１に接続されていることは勿論である。
特定電気事業者20は、特定地域の複数の需要家22に電力を供給するための発電設備21を有している。また、図１では、特定規模電気事業者10は発電設備11を所有している例が示されている。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is an overall configuration diagram for explaining a power supply path when a power supply failure occurs in a specific electric power company. FIG. 2 shows a power supply path when the specific electric power company normally supplies power. It is a whole block diagram for demonstrating.
1 and 2, the same components as those in FIG. 3 are given the same reference numerals, but are different from FIG. 3 in that a specific electric utility 20 is connected to the power system 1. In addition, although the general electric power company 3 and the electric power generation company 40 which were described in FIG. 3 are abbreviate | omitted in FIG. 1, it is needless to say that it is actually connected to the electric power grid | system 1. FIG.
The specific electric power company 20 has a power generation facility 21 for supplying power to a plurality of consumers 22 in a specific area. Further, FIG. 1 shows an example in which the specific scale electric power company 10 owns the power generation facility 11.

このような構成において、特定電気事業者20の発電設備21が需要家22に対して正常に電力供給を行っている時には、図２において実線矢印で示されているように、特定規模電気事業者10の発電設備11の電力は、電力系統１を介して需要家30の負荷32に供給されているが、特定電気事業者20には供給されない。特定地域の需要家22には、特定電気事業者20の発電設備21からのみ電力供給が行われている。このとき、需要家30の非常用発電機31は待機状態にあり、負荷32に対して電力供給は行っていない。
これに対して、特定電気事業者20の発電設備21に障害が発生し、需要家22に対して正常に電力供給が行えなくなった時の電力供給経路を図１に基づいて説明する。
特定電気事業者20の発電設備21に障害が発生して電力供給ができなくなった場合、特定電気事業者20は特定規模電気事業者10に対して事故時補給電力の供給を依頼する。この依頼を受けた特定規模電気事業者10は、特定電気事業者20に対して補給電力の供給を開始する。そして、特定規模電気事業者10は、特定電気事業者への電力供給により自己の発電設備の設備容量を超える電力が必要となった場合、需要家30に対して非常用発電機31の運転を依頼する。 In such a configuration, when the power generation facility 21 of the specific electric utility 20 is normally supplying power to the customer 22, as shown by the solid arrow in FIG. The electric power of the ten power generation facilities 11 is supplied to the load 32 of the consumer 30 through the electric power system 1, but is not supplied to the specific electric power company 20. Electric power is supplied only to the power generation facility 21 of the specific electric power company 20 to the consumer 22 in the specific area. At this time, the emergency generator 31 of the customer 30 is in a standby state, and no power is supplied to the load 32.
On the other hand, a power supply path when a failure occurs in the power generation facility 21 of the specific electric utility 20 and the power supply to the consumer 22 cannot be normally performed will be described with reference to FIG.
When the power generation facility 21 of the specified electric power company 20 fails and cannot supply power, the specified electric power company 20 requests the specified electric power company 10 to supply supplementary power during an accident. The specific-scale electric power company 10 that has received this request starts to supply supplementary power to the specific electric power company 20. The specific-scale electric power company 10 operates the emergency generator 31 with respect to the customer 30 when the power supply to the specific electric power company exceeds the capacity of its own power generation facility. Ask.

この依頼を受けた需要家30は、非常用発電機31を運転し、特定規模電気事業者10からの電力供給と非常用発電機31からの電力供給を併用して負荷運転を続ける（図１の実線矢印参照）。これにより、特定規模電気事業者10から需要家30に対して供給される電力は、非常用発電機31の発電量に相当する分だけ低減される。
これにより、特定規模電気事業者10は、この低減された電力を電力系統１を介して特定電気事業者20の特定地域の需要家22に供給する（図１の破線矢印参照）。このようにして、特定規模電気事業者10は、自己の発電設備の設備容量を不変として低廉な価格の電力を特定電気事業者20に供給することができる。
特定電気事業者20の発電設備21の障害が復旧した時点で、特定規模電気事業者10から特定電気事業者20への電力供給は終了するとともに、需要家30の非常用発電機3１の運転も停止され、需要家30の負荷32には特定規模電気事業者10から全ての電力供給が行われる。 Upon receiving this request, the customer 30 operates the emergency generator 31 and continues the load operation by using both the power supply from the specific-scale electric utility 10 and the power supply from the emergency generator 31 (FIG. 1). (See the solid arrow in). Thereby, the electric power supplied from the specific scale electric power company 10 to the customer 30 is reduced by an amount corresponding to the power generation amount of the emergency generator 31.
Thereby, the specific scale electric power company 10 supplies this reduced electric power to the consumer 22 in the specific area of the specific electric power company 20 through the electric power system 1 (see the broken line arrow in FIG. 1). In this way, the specific scale electric power company 10 can supply the specific electric power company 20 with low-priced power while keeping the capacity of its own power generation equipment unchanged.
When the failure of the power generation facility 21 of the specified electric power company 20 is restored, the power supply from the specified electric power company 10 to the specified electric power company 20 is terminated and the emergency generator 31 of the customer 30 is also operated. The electric power supply 10 is supplied to the load 32 of the customer 30 from the specific scale electric power company 10.

需要家30の非常用発電機31は、需要家30は所有する設備であるため、前記のように特定電気事業者20の発電設備21の障害時に、需要家30の非常用発電機31を運転してもらうために、特定規模電気事業者10と需要家30との間には、特定規模電気事業者10が非常用発電機31を借用して運用する形の契約を締結しておく。そして、特定電気事業者20の発電設備21に障害が発生したときに授受された電力量に応じて、特定規模電気事業者10、特定電気事業者20、需要家30の間で料金の精算が行われる。
特定規模電気事業者10は、非常用発電機31を借用しつつ、それを運用するのに要する経費を勘案し、それと実際の事業で得られる収入とのバランスを考慮し、非常用発電機31を借用するかを決定すれば良い。 Since the emergency generator 31 of the customer 30 is a facility owned by the customer 30, the emergency generator 31 of the customer 30 is operated when the power generation facility 21 of the specific electric utility 20 fails as described above. Therefore, a contract in which the specific-scale electric utility 10 borrows and operates the emergency generator 31 is concluded between the specific-scale electric utility 10 and the customer 30. Then, depending on the amount of power transferred when a failure occurs in the power generation facility 21 of the specified electric power company 20, charges are settled between the specified electric power company 10, the specified electric power company 20, and the customer 30. Done.
The specific electric utility 10 borrows the emergency generator 31, considers the expenses required to operate it, and considers the balance between the actual income and the income generated in the actual business. You can decide whether to borrow.

本発明において、特定電気事業者に電力供給障害が発生した時の電力供給経路を説明するための全体構成図。The whole block diagram for demonstrating the electric power supply path | route when the electric power supply failure generate | occur | produces in the specific electric utility in this invention. 本発明において、特定電気事業者が正常に電力供給を行っている時の電力供給経路を示す全体構成図。In this invention, the whole electric power supply path | route when a specific electric power supplier is supplying electric power normally is a block diagram which shows the electric power supply path | route. 従来の電力制御・管理システムの全体的な構成を示すブロック図。The block diagram which shows the whole structure of the conventional power control and management system.

符号の説明Explanation of symbols

１…電力系統、２…通信ネットワーク、３…一般電気事業者、４，２１，４１…発電設備、１０…特定規模電気事業者、１１…サーバ、２０…特定電気事業者、２２…特定電気事業者の需要家、３０…需要家、３１…非常用発電機、３２…負荷、４０…発電事業者 DESCRIPTION OF SYMBOLS 1 ... Electric power system, 2 ... Communication network, 3 ... General electric power company, 4, 21, 41 ... Power generation equipment, 10 ... Specific scale electric power company, 11 ... Server, 20 ... Specific electric power company, 22 ... Specific electric power business Consumers ... 30 ... customers, 31 ... emergency generators, 32 ... loads, 40 ... power generators

Claims (2)

他者から電力を購入あるいは発電設備を所有する特定規模電気事業者と、発電設備を所有し、特定の供給地点に電力を供給する特定電気事業者と、非常用電源を所有する需要家とが電力系統に接続され、常時は、前記特定規模電気事業者は前記需要家に電力供給を行い、前記特定電気事業者は前記特定規模電気事業者からは電力供給を受けず、電気自己所有の発電設備により特定の供給地点に電力供給を行う電力供給システムにおいて、
前記特定電気事業者所有の発電設備に障害が発生した際、前記特定規模事業者は、前記特定電気事業者に電力供給を行い、前記特定電気事業者への電力供給により自己の発電設備の設備容量を超える電力が必要となった場合、前記需要家の非常用電源を運転させて該需要家への電力供給を減少させ、前記特定電気事業者への電力供給を確保することを特徴とする電力供給システム。 There are specific-scale electric utilities that purchase power from other parties or own power generation facilities, specific electric power utilities that own power generation facilities and supply power to specific supply points, and customers who own emergency power sources. It is connected to a power system, and at the normal time, the specific-scale electric power company supplies power to the consumer, and the specific electric power company does not receive power supply from the specific-scale electric power company. In a power supply system that supplies power to a specific supply point using equipment,
When a failure occurs in the power generation equipment owned by the specific electric power company, the specific electric power company supplies power to the specific electric power company, and the power generation equipment is installed by supplying power to the specific electric power company. When power exceeding the capacity is required, the emergency power source of the consumer is operated to reduce the power supply to the consumer, thereby securing the power supply to the specific electric utility Power supply system. 請求項１に記載の電力供給システムにおいて、
発電設備を所有する発電事業者が前記電力系統に接続され、前記特定規模電気事業者は前記発電事業者の発電設備の余剰電力を購入することを特徴とする電力供給システム。 The power supply system according to claim 1,
A power supply system, wherein a power generation company that owns a power generation facility is connected to the power system, and the specific-scale electric power company purchases surplus power of the power generation facility of the power generation business.
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* Cited by examiner, † Cited by third party
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JP2010154617A (en) * 2008-12-24 2010-07-08 Mitsubishi Heavy Ind Ltd Underpower replenishing system of operating non-utility power generation facility
JP2010246306A (en) * 2009-04-08 2010-10-28 Ntt Facilities Inc Device, method and system for controlling power supply
WO2013122372A1 (en) * 2012-02-13 2013-08-22 에스케이이노베이션 주식회사 Distributed power generating system and method for controlling same
WO2017146243A1 (en) 2016-02-25 2017-08-31 京セラ株式会社 Power management server, power management system, and power management method

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JP2002223531A (en) * 2001-01-24 2002-08-09 Osaka Gas Co Ltd Method of consigning privately-generated and supplied power, and power generating facility
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JP2004282898A (en) * 2003-03-14 2004-10-07 Osaka Gas Co Ltd Power supply and demand control system

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JP2002223531A (en) * 2001-01-24 2002-08-09 Osaka Gas Co Ltd Method of consigning privately-generated and supplied power, and power generating facility
JP2002300723A (en) * 2001-03-30 2002-10-11 Tokyo Gas Co Ltd Consignment system
JP2003032899A (en) * 2001-07-10 2003-01-31 Ennet Corp Power control and management system
JP2004282898A (en) * 2003-03-14 2004-10-07 Osaka Gas Co Ltd Power supply and demand control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010154617A (en) * 2008-12-24 2010-07-08 Mitsubishi Heavy Ind Ltd Underpower replenishing system of operating non-utility power generation facility
JP2010246306A (en) * 2009-04-08 2010-10-28 Ntt Facilities Inc Device, method and system for controlling power supply
WO2013122372A1 (en) * 2012-02-13 2013-08-22 에스케이이노베이션 주식회사 Distributed power generating system and method for controlling same
WO2017146243A1 (en) 2016-02-25 2017-08-31 京セラ株式会社 Power management server, power management system, and power management method

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