JPWO2004073136A1 - Power system - Google Patents

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JPWO2004073136A1
JPWO2004073136A1 JP2005505005A JP2005505005A JPWO2004073136A1 JP WO2004073136 A1 JPWO2004073136 A1 JP WO2004073136A1 JP 2005505005 A JP2005505005 A JP 2005505005A JP 2005505005 A JP2005505005 A JP 2005505005A JP WO2004073136 A1 JPWO2004073136 A1 JP WO2004073136A1
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power
power supply
demand
supplier
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JP5100009B2 (en
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松本 吉彦
吉彦 松本
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Vpec株式会社
Vpec株式会社
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

複数の電力需給家が、電力需給制御機器により相互接続されて構成された、従来の電力系統に拠らない電力システムを提供する。発電機器101、蓄電機器102および複数の負荷103と、電力需給制御機器104とを備えた電力需給家の複数が電力需給線路Wを介して相互接続されてなり、前記電力需給制御機器は、当該電力需給制御機器が備えられた電力需給家11において電力不足が生じるか否か、または電力余剰が生じるか否かを判断し、当該電力需給家11において電力不足が生じる場合には、発電機器および/または蓄電機器を備えた他の電力需給家12〜15から電力を受け取り、当該電力需給家11において電力余剰が生じる場合には、他の電力需給家11〜15に電力を渡すことを特徴とする。Provided is an electric power system that is configured by a plurality of electric power suppliers and demanders interconnected by an electric power supply and demand control device and that does not depend on a conventional electric power system. A plurality of power suppliers and demanders including a power generation device 101, a power storage device 102, a plurality of loads 103, and a power supply / demand control device 104 are interconnected via a power supply / demand line W. It is determined whether or not there is a power shortage in the power supplier and demander 11 equipped with the power supply and demand control device, or whether or not a power surplus occurs. / Or receives power from other power suppliers / suppliers 12-15 provided with power storage devices, and when power surplus occurs in the power supplier / supplier 11, the power is passed to the other power suppliers / suppliers 11-15. To do.

Description

本発明は、複数の電力需給家が、電力需給制御機器により相互接続されてなる電力システムに関する。
発明の背景
従来の電力系統は、図8に示すように、大規模発電所91を頂点とし需要家92を裾野とする「放射状系統」が基本である。図8では、複数の送電系統を確保するために、一部で「ループ系統」が導入されている。この種の電力系統は、広域(たとえば数万km)であり、かつ大規模(数十GW)に、単一システムとして構成されている。
一方、近年、ソラー発電、燃料電池による系統連系型分散発電システム(たとえば、特許文献1参照)が注目されている。系統連系型分散発電システムは、通常、従来の放射状の電力系統の末端領域あるいは末端に近い局所領域に構築されるもので、当該電力系統との連系を前提としている。
特開平6−327146号
The present invention relates to a power system in which a plurality of power suppliers and demanders are interconnected by a power supply and demand control device.
Background of the Invention As shown in FIG. 8, the conventional power system is basically a “radial system” having a large-scale power plant 91 as a top and a customer 92 as a base. In FIG. 8, a “loop system” is partially introduced to secure a plurality of power transmission systems. This type of power system is configured as a single system in a wide area (for example, several tens of thousands km 2 ) and on a large scale (several tens of GW).
On the other hand, in recent years, solar power generation and a grid-connected distributed power generation system using a fuel cell (see, for example, Patent Document 1) have attracted attention. A grid-connected distributed power generation system is normally constructed in a terminal region of a conventional radial power system or a local region near the terminal, and is premised on connection with the power system.
JP-A-6-327146

図8に示した従来の電力系統構造では、電力の移送が大量に長距離に行われるため損失が多く、また太陽エネルギー・風力エネルギー等の再生可能なエネルギー由来の発電ではその再生可能エネルギーが遍在しているため、これらのエネルギーを利用した大規模発電所を構築しにくい。
本発明の目的は、複数の電力需給家が、電力需給制御機器により相互接続されて構成された、従来の電力系統に拠らない電力システムを提供することである。
本発明の電力システムは、1つまたは複数の発電機器、1つまたは複数の蓄電機器および1つまたは複数の電力消費機器のうちから選ばれた少なくとも1つの機器と、電力需給制御機器とを備えた電力需給家の複数が相互接続されてなる電力システムにおいて、前記電力需給制御機器は、当該電力需給制御機器が備えられた前記電力需給家において電力不足が生じるか否か、または電力余剰が生じるか否かを判断し、当該電力需給家において電力不足が生じる場合には、前記発電機器および/または前記蓄電機器を備えた他の電力需給家から電力を受け取り、当該電力需給家において電力余剰が生じる場合には、他の電力需給家に電力を渡すことを特徴とする。
また、本発明の電力システムは、1つまたは複数の発電機器、1つまたは複数の蓄電機器および1つまたは複数の電力消費機器のうちから選ばれた少なくとも1つの機器と、電力需給制御機器とを備えた電力需給家の複数が相互接続されてなる電力システムであって、前記複数の電力需給家は、複数の群に区分され、各群に属する電力需給制御機器は、当該群において電力不足が生じるか否か、または電力余剰が生じるか否かを判断し、当該群において電力不足が生じる場合には、前記発電機器および/または前記蓄電機器を備えた電力需給家が属する他の群から電力を受け取り、当該群において電力余剰が生じる場合には、他の群に電力を渡すことを特徴とする。
本発明では、従来の電力系統を持たずに、基本的には各電力需給家は自立している電力システムである。すなわち、各電力需給家は、電力不足・電力余剰が生じたときは、他の電力需給家との間で電力の需給を行い、またこれによりシステム全体での自立を目的とする。
本発明では、複数の前記電力需給家は、分枝状電力需給線路、数珠つなぎ状電力需給線路、放射状電力需給線路、網状電力需給線路またはこれらを組み合わせた電力需給線路に接続することができる。
また、本発明では、前記電力需給制御機器は、他の電力需給家の前記電力需給制御機器との間で電力の需給情報のやり取りをデータ通信ネットワークを介して行うことができる。
本発明では、DC送配電の利点を十分に活用するために、複数の前記電力需給家を、相互にDC接続することができる。
In the conventional power system structure shown in FIG. 8, a large amount of power is transferred over a long distance, so there is a lot of loss. In the case of power generation derived from renewable energy such as solar energy and wind energy, the renewable energy is ubiquitous. Therefore, it is difficult to build a large-scale power plant using these energies.
The objective of this invention is providing the electric power system which does not depend on the conventional electric power grid | structure comprised by the some electric power supplier and demander being mutually connected by the electric power supply-and-demand control apparatus.
The power system of the present invention includes at least one device selected from one or more power generation devices, one or more power storage devices, and one or more power consumption devices, and a power supply / demand control device. In the electric power system in which a plurality of electric power suppliers and demanders are interconnected, the electric power supply and demand control device determines whether or not there is a power shortage in the electric power supplier and demander provided with the electric power supply and demand control device, or an electric power surplus occurs. If power shortage occurs in the power supplier and demander, it receives power from the power generator and / or another power supplier and demander equipped with the power storage device, and there is a power surplus in the power supplier and demander. When it occurs, it is characterized by passing power to another power supplier and demander.
Moreover, the power system of the present invention includes at least one device selected from one or more power generation devices, one or more power storage devices, and one or more power consumption devices, a power supply and demand control device, A plurality of power supply and demanders, wherein the plurality of power supply and demanders are divided into a plurality of groups, and the power supply and demand control equipment belonging to each group has insufficient power in the group If there is a power shortage in the group, the power generator and / or the electric power supplier / provider with the power storage device belongs to the other group to which the power supplier / supplyer belongs. When power is received and power surplus occurs in the group, the power is passed to another group.
In the present invention, each electric power supplier and demander is basically an independent electric power system without having a conventional electric power system. In other words, each power supplier and demander supplies and supplies power with other power suppliers and suppliers when power shortages and surpluses occur, and is intended to be independent throughout the system.
In the present invention, the plurality of electric power suppliers and demanders can be connected to a branched electric power supply and demand line, a daisy chain electric power supply and demand line, a radial electric power supply and demand line, a meshed electric power supply and demand line, or a combination of these electric power supply and demand lines.
In the present invention, the power supply and demand control device can exchange power supply and demand information with the power supply and demand control device of another power supplier and demander via a data communication network.
In the present invention, in order to fully utilize the advantages of DC power transmission and distribution, a plurality of the power suppliers and demanders can be DC-connected to each other.

図1は本発明の電力システムの一実施形態を示す説明図、図2は本発明の電力システムにおいて、電力需給家の電力需給制御機器が、他の電力需給家とAC電力の需給を行うときの説明図、図3は本発明の電力システムにおいて、電力需給家の電力需給制御機器が、他の電力需給家とDC電力の需給を行うときの説明図、図4は本発明の電力システムにおいて、電力需給家の屋内配線を介してDC電力を負荷に給電する場合の説明図、図5は本発明の電力システムにおける、電力需給家が階層化されている様子を示す説明図、図6は、(A)は電力需給家が分枝状に接続されている場合の説明図、(B)は電力需給家が星状に接続されている場合の説明図、(C)は電力需給家が網状に接続されている場合の説明図、図7は複数の他の電力需要家と異なる電力需給線路を介して接続された電力需給家の例を示す図、図8は従来の電力系統を示す説明図である。  FIG. 1 is an explanatory diagram showing an embodiment of the power system of the present invention, and FIG. 2 is a diagram illustrating when the power supply / demand control device of the power supplier / demand performs AC power supply / demand with another power supplier / supplyer in the power system of the present invention. FIG. 3 is an explanatory diagram of the power system of the present invention, in which the power supply and demand control device of the power supplier and demander performs DC power supply and demand with another power supplier and demander, and FIG. 4 is the power system of the present invention. FIG. 5 is an explanatory diagram in the case of supplying DC power to a load through an indoor wiring of an electric power supplier and demander, FIG. 5 is an explanatory diagram showing a state in which the electric power supplier and demander is hierarchized in the electric power system of the present invention, and FIG. , (A) is an explanatory diagram when the power supplier and demander is connected in a branch shape, (B) is an explanatory diagram when the power supplier and demander is connected in a star shape, and (C) is an electric power supplier and demander. FIG. 7 is an explanatory diagram when connected in a net shape, and FIG. Diagram illustrating an example of a connected power supplier and demander via different power supply lines and house 8 is an explanatory diagram showing a conventional electric power system.

図1の電力システム1は、複数の電力需給家11〜15の電力需給家のみを示す。各電力需給家11〜15は、電力需給線路Wを介して相互に接続されている。
電力需給家11は、発電機器101と、蓄電機器102と、複数の負荷(電気機器)103と、電力需給制御機器104を備えている。なお、複数の電気機器103は、A1,A2,・・・,Anで示してある。また、図1では、他の電力需給家12,13,14および図示しない他の電力需給家も電力需給家11と同様、発電機器と、蓄電機器と、複数の負荷(電気機器)と、電力需給制御機器とを備えており、各機器は枝状の屋内配線に接続されているものとする。
本発明では、各電力需給家間は疎結合している。すなわち、各電力需給家は、基本的には自立型であり、電力不足が生じたときに他の電力需給家から電力の供給を受け、電力余剰が生じたときに他の電力需給家に電力を供給することができる。
電力需給家11は、たとえば、一般家屋、集合住宅、小・中・大規模工場、低層・中層・高層ビルディング等である。さらにこれら一般家屋、集合住宅等が複数集合した群も本発明の電力需給家11として扱うことができる。
典型的には、発電機器101は、ソラー発電器、燃料電池等のDC電源である。発電機器101として風力発電が用いられることもある。風力発電機器は通常AC電源であるが、その出力をAC/DC変換してDC電源として使用することができる。また、蓄電機器102は、DC電源である。負荷103は、たとえば、電灯、空調機、冷蔵庫、電磁調理器、炊飯器等のDC機器またはAC機器である。
電力需給制御機器104は、電力需給家11において電力余剰が生じたとき、たとえば負荷103の電力使用量が低減しかつ蓄電機器102が満充電あるいは満充電に近くなったときに、発電機器101が生成する電力を、電力需給線路Wに接続された他の電力需給家、あるいは電力需給家15に供給することができる。また、電力需給制御機器104は、電力需給家11において電力不足が生じたとき、たとえば負荷103の電力使用量が急増したときに、電力需給線路Wに接続された電力余剰が生じている他の電力需給家12,13,14の電力需給制御機器、あるいは電力需給家15の後述する電力需給制御機器153を介して電力の供給を受け、負荷103を駆動し、あるいは蓄電機器102に蓄電することができる。
電力需給家15は、発電機器151と、蓄電機器152と、電力需給制御機器153とを備えている。なお、電力需給家は、発電機器と、蓄電機器の何れかのみを備えることができる。発電機器151は、典型的には火力、水力、風力等の中小規模設備であり、蓄電機器152は、典型的には二次電池である。電力需給家15は、電力需給制御機器153を介して、前述したように電力需給家11(あるいは、他の電力需給家12〜14等)に電力を供給できる。また逆に、電力需給家15は、電力需給家11(あるいは、他の電力需給家12〜14等)から電力の供給を受けることもできる。
電力需給家15が電力需給家11等に供給する電力は、発電機器151により生成した電力または蓄電機器152に蓄電された電力であり、電力需給家15が電力需給家11等から供給される電力は蓄電機器152に蓄電される。
図1に示した電力システムでは、電力需給制御機器104は、他の電力需給家12〜15と電力の需給を行う場合には、当該電力需給制御機器104が、当該他の電力需給家の電力需給制御機器と情報交換をして需給条件等を決定する。
図1に示した電力システムでは、電力需給家間の電力の需給をACで行うこともできるし、DCで行うこともできるが、何れにしても、局所的な電力システムとして構築することもできるし、これらの電力システムが組み合わされた大きな電力システムとして構築することもできる。
図1に示した電力システムでは、図示はしないが、負荷のみからなる電力需給家が電力需給線路Wに接続されることもある。また、図1の電力システムでは、多数かつ多様な電力需給家を相互接続することで、需給電力の平準化が行われる。
電力需給家11の蓄電機器102を大容量とした場合に、コスト高となる場合には、蓄電機器102として小容量のものを使用し(あるいは、蓄電機器102を備えずに)、他の電力需給家から供給される電力により負荷をまかなうようにすることができる。この場合、電力システム1には、時間帯消費電力パターンが異なる電力需給家(たとえば、住宅と事業所)が混在していることが好ましい。また、電力需給家15として、発電形態が異なるもの(たとえば、ソラー発電機器と風力発電機器)が混在していることが好ましい。
図2は、電力需給家の電力需給制御機器が、他の電力需給家とAC電力の需給を行う電力システムを示す説明図である。
図2の電力需給家11a,12a,13a,14aおよび15aは、図1の電力需給家11,12,13,14および15に対応している。図2における電力需給家11aの電力需給制御機器51は、制御装置511と、双方向AC/DC変換器512とを備えている。
各電力需給家の制御装置同士は通信ラインCLによりデータ通信が可能に構成されており、電力需給に際して需給情報の交換を行うことができる。
また、電力需給家15aの電力需給制御機器61は、制御装置611と、双方向AC/ACまたはDC/AC変換器612とを備えている。電力需給家間でAC電力の需給が行われるときには、両者の間で電圧・電流・周波数・位相の整合をとらなければならない。この整合は、電力需給制御機器51,61が行う。なお、図2には図示していないが、電力需給制御機器51,61には限流器、積算電力計等をさらに備えることができる。
図3は、電力需給家の電力需給制御機器が、他の電力需給家とDC電力の需給を行う電力システムを示す説明図である。
図3の電力需給家11b,12b,13b,14bおよび15bは、図1の電力需給家11,12,13,14および15に対応している。図3における電力需給家15bの電力需給制御機器71は、制御装置711と、双方向DC/DC変換器712とを備えている。
各電力需給家の制御装置同士は通信ラインCLによりデータ通信が可能に構成されており、電力需給に際して需給情報の交換を行うことができる。
また、電力需給家11bの電力需給制御機器81は、制御装置811と、双方向DC/DCまたはDC/AC変換器812とを備えている。電力需給家間でDCで電力の需給が行われるときには、電圧・電流の調整を行う。なお、図3には図示していないが、電力需給制御機器71,81には限流器、積算電力計等をさらに備えることができる。
図4は、電力需給家の屋内配線を介してDC電力を負荷に配電する場合の説明図である。
図4の電力需給家11cでは、図1に示した電力需給家11における発電機器と蓄電機器と複数の負荷とが具体的に示されている。なお、図4の電力需給制御機器71は、図3の電力需給制御機器71と同一のものである。
電力需給家11cにおいて、発電機器はソラー発電器701であり、蓄電機器はバッテリー702であり、複数の負荷はDC負荷7031とAC負荷7032である。
ここでは、双方向DC/DC変換器712は、バッテリー702、ソラー発電器701、DC負荷7031との間で電力の需給を行うとともに、DC/AC変換器706を介してAC負荷7032との間で電力の需給を行う。
ソラー発電器701が生成する電力は、たとえば双方向DC/DC変換器712を介してバッテリー702、DC負荷7031に供給され、あるいはDC/AC変換器706を介してAC負荷7032には供給される。
電力需給制御機器71は、バッテリー702の充電を制御する機能、屋内配線L側への安定出力を補償する機能を備えている。
DC負荷7031には、電力需給制御機器71からの電力が屋内配線L、DCコンセント7051を介して供給され、AC負荷7032には、電力需給制御機器71からの電力が屋内配線L、DC/AC変換器706、ACコンセント7052を介して供給される。なお、図4では、DCコンセント,ACコンセントはそれぞれ1つしか示していないが、それぞれ複数設け、これらにDC負荷、AC負荷を接続することができる。
ところで、図1の電力システムでは、電力需給家の適宜数を集めた群を、一つの電力需給家として扱うことができる。図5に示すように、電力需給家群G11,G12,・・・は、このときの群(たとえば、数十〜1万戸程度)を示している。
図5では、電力需給家群G11,G12,・・・同士は、電力需給制御機器S1を介して相互に接続されている。また、電力需給家群G11,G12,・・・の上位階層は、G21,G22,・・・で示され、更に上位階層はG31,G32,G33,・・・で示されている。ここでは、図示はされていないが、G31,G32,G33,・・・より更に上位の階層が形成される。
たとえば、電力需給家群G11,G12,・・・は「町」単位、G21,G22,・・・は「市」単位、G31,G32,G33,・・・は、「県」単位とされる。
図5では、電力需給家群G11,G12,・・・は、電力需給制御機器S1により他の電力需給家と相互接続されているが、各上位階層と下位階層とは、電力需給制御機器S2,S3,S4・・・を介して相互に階層接続されている。
上記の実施形態では、各電力需給家が、図6(A)に示すような分枝状に接続されている場合を説明した。各電力需給家は、図6(B)に示すように星状に接続してもよいし、図6(C)に示すように網状に接続してもよい。さらに、これらを複合した態様で接続してもよい。
図7は、複数の他の電力需要家と異なる電力需給線路を介して接続された電力需給家の例を示す図である。図7では、双方向DC/DC変換器712は、たとえば図6(C)に示したような電力需給家同士の接続態様において、電力需給線路W1,W2,W3間で電力の移動をして他の電力需給家同士の電力需給を仲介することができる。
The electric power system 1 of FIG. 1 shows only the electric power supplier and demander of the some electric power supplier and demander 11-15. The electric power suppliers and demanders 11 to 15 are connected to each other via the electric power supply and demand line W.
The power supplier and demander 11 includes a power generation device 101, a power storage device 102, a plurality of loads (electric devices) 103, and a power supply / demand control device 104. The plurality of electric devices 103 are indicated by A1, A2,. In addition, in FIG. 1, other power suppliers and demanders 12, 13, and 14 and other power suppliers and demanders (not shown) are also similar to the power supplier and demander 11, the power generation device, the power storage device, a plurality of loads (electric devices), It is assumed that supply and demand control equipment is provided, and each equipment is connected to branch indoor wiring.
In the present invention, each power supplier and demander is loosely coupled. In other words, each power supplier and demander is basically self-supporting, receives power from other power suppliers and suppliers when power shortages occur, and supplies power to other power suppliers and suppliers when power surplus occurs. Can be supplied.
The electric power supplier and demander 11 is, for example, a general house, an apartment house, a small / medium / large-scale factory, a low-rise / mid-rise / high-rise building, and the like. Furthermore, a group in which a plurality of these general houses and apartment houses are collected can be handled as the electric power supplier and demander 11 of the present invention.
Typically, the power generation device 101 is a DC power source such as a solar power generator or a fuel cell. Wind power generation may be used as the power generation device 101. The wind turbine generator is usually an AC power supply, but the output can be AC / DC converted and used as a DC power supply. The power storage device 102 is a DC power source. The load 103 is, for example, a DC device or an AC device such as an electric light, an air conditioner, a refrigerator, an electromagnetic cooker, and a rice cooker.
The power supply / demand control device 104 is configured such that when the power surplus occurs in the power supply / demand supplier 11, for example, when the amount of power used by the load 103 is reduced and the power storage device 102 is fully charged or nearly fully charged, The electric power to be generated can be supplied to another electric power supplier and demander connected to the electric power supply and demand line W or the electric power supplier and demander 15. In addition, the power supply / demand control device 104 has another power supply / supply line connected to the power supply / demand line W when power shortage occurs in the power supplier / supplyer 11, for example, when the power usage of the load 103 increases rapidly. Power is supplied via the power supply / demand control equipment of the power supply / demand suppliers 12, 13, 14, or the power supply / demand control equipment 153 described later of the power supply / demand supply 15, and the load 103 is driven or stored in the power storage device 102. Can do.
The power supplier and demander 15 includes a power generation device 151, a power storage device 152, and a power supply / demand control device 153. In addition, the electric power supplier and demander can include only one of the power generation device and the power storage device. The power generation device 151 is typically a medium to small-scale facility such as thermal power, hydraulic power, and wind power, and the power storage device 152 is typically a secondary battery. As described above, the power supplier and demander 15 can supply power to the power supplier and demander 11 (or other power supplier and demander 12 to 14 etc.) via the power demand and supply control device 153. On the other hand, the power supplier and demander 15 can also receive power from the power supplier and demander 11 (or other power supplier and demander 12 to 14 etc.).
The power supplied from the power supplier / supplier 15 to the power supplier / supplier 11 or the like is the power generated by the power generator 151 or the power stored in the power storage device 152, and the power supplied from the power supplier / supplier 15 or the like. Is stored in the power storage device 152.
In the power system shown in FIG. 1, when the power supply / demand control device 104 performs power supply / demand with the other power supply / demand suppliers 12 to 15, the power supply / demand control device 104 uses the power of the other power supply / demand suppliers. Exchange information with supply and demand control equipment to determine supply and demand conditions.
In the power system shown in FIG. 1, power supply and demand between power suppliers and demanders can be performed by AC or DC, but in any case, it can be constructed as a local power system. However, it can also be constructed as a large power system in which these power systems are combined.
In the electric power system shown in FIG. 1, although not shown, an electric power supplier and demander consisting only of a load may be connected to the electric power supply and demand line W. In the power system of FIG. 1, supply and demand power is leveled by interconnecting a large number and variety of power suppliers and demanders.
If the power storage device 102 of the power supplier and demander 11 has a large capacity and the cost is high, use a small capacity power storage device 102 (or no power storage device 102) and use other power It is possible to cover the load with the electric power supplied from the supplier and demander. In this case, it is preferable that the power system 1 includes a power supplier and demander (for example, a house and a business office) having different time zone power consumption patterns. Moreover, it is preferable that the power supply and demanders 15 are different in the form of power generation (for example, solar power generation equipment and wind power generation equipment).
FIG. 2 is an explanatory diagram showing an electric power system in which an electric power supply and demand control device of an electric power supplier and demander supplies and receives AC power with another electric power supplier and demander.
The power suppliers and demanders 11a, 12a, 13a, 14a and 15a in FIG. 2 correspond to the power suppliers and demanders 11, 12, 13, 14 and 15 in FIG. 2 includes a control device 511 and a bidirectional AC / DC converter 512.
The control devices of each power supplier and demander are configured to be capable of data communication through the communication line CL, and can exchange supply and demand information during power supply and demand.
In addition, the power supply / demand control device 61 of the power supplier / supplyer 15 a includes a control device 611 and a bidirectional AC / AC or DC / AC converter 612. When AC power is supplied and received between power suppliers and suppliers, voltage, current, frequency, and phase must be matched between the two. This matching is performed by the power supply / demand control devices 51 and 61. Although not shown in FIG. 2, the power supply / demand control devices 51 and 61 can further include a current limiter, an integrating wattmeter, and the like.
FIG. 3 is an explanatory diagram showing a power system in which a power supply / demand control device of a power supply / demand provider supplies / receives DC power to / from another power supply / demand provider.
The power suppliers and demanders 11b, 12b, 13b, 14b and 15b in FIG. 3 correspond to the power suppliers and demanders 11, 12, 13, 14 and 15 in FIG. 3 includes a control device 711 and a bidirectional DC / DC converter 712. The power supply / demand control device 71 of the power supplier / supplyer 15b in FIG.
The control devices of each power supplier and demander are configured to be capable of data communication through the communication line CL, and can exchange supply and demand information during power supply and demand.
In addition, the power supply / demand control device 81 of the power supplier / demander 11 b includes a control device 811 and a bidirectional DC / DC or DC / AC converter 812. When electric power supply and demand is performed between DC electric power suppliers and DCs, voltage and current are adjusted. Although not shown in FIG. 3, the power supply / demand control devices 71, 81 can further include a current limiter, an integrating wattmeter, and the like.
FIG. 4 is an explanatory diagram in the case where DC power is distributed to the load via the indoor wiring of the power supplier and demander.
In the power supplier and demander 11c of FIG. 4, the power generation device, the power storage device, and a plurality of loads in the power supplier and demander 11 shown in FIG. 1 are specifically shown. 4 is the same as the power supply / demand control device 71 in FIG.
In the power supplier and demander 11c, the power generation device is a solar power generator 701, the power storage device is a battery 702, and a plurality of loads are a DC load 7031 and an AC load 7032.
Here, the bidirectional DC / DC converter 712 supplies and receives power between the battery 702, the solar power generator 701, and the DC load 7031, and between the AC load 7032 via the DC / AC converter 706. To supply and demand electricity.
The electric power generated by the solar generator 701 is supplied to the battery 702 and the DC load 7031 via the bidirectional DC / DC converter 712 or supplied to the AC load 7032 via the DC / AC converter 706, for example. .
The power supply / demand control device 71 has a function of controlling charging of the battery 702 and a function of compensating for stable output to the indoor wiring L side.
The DC load 7031 is supplied with power from the power supply / demand control device 71 via the indoor wiring L and the DC outlet 7051, and the AC load 7032 is supplied with power from the power supply / demand control device 71 through the indoor wiring L, DC / AC. It is supplied via a converter 706 and an AC outlet 7052. In FIG. 4, only one DC outlet and one AC outlet are shown, but a plurality of DC outlets and AC loads can be provided, and a DC load and an AC load can be connected to them.
By the way, in the electric power system of FIG. 1, the group which collected the appropriate number of electric power suppliers and demanders can be handled as one electric power supplier and demander. As shown in FIG. 5, the electric power supplier and demander group G11, G12,... Indicates a group at this time (for example, about several tens to 10,000 houses).
In FIG. 5, the power supplier and demander groups G11, G12,... Are connected to each other through the power supply and demand control device S1. Moreover, the upper hierarchy of the electric power supplier-and-demand group G11, G12, ... is shown by G21, G22, ..., and the upper hierarchy is shown by G31, G32, G33, .... Here, although not shown in the figure, higher layers than G31, G32, G33,... Are formed.
For example, the power supply and demand groups G11, G12,... Are in “town” units, G21, G22,... Are in “city” units, and G31, G32, G33,. .
In FIG. 5, the power supplier and demander group G11, G12,... Are interconnected with other power supplier and demander by the power supply and demand control device S1, but each upper layer and lower layer are connected to the power supply and demand control device S2. , S3, S4,...
In the above embodiment, a case has been described in which each power supplier and demander is connected in a branched shape as shown in FIG. Each electric power supplier and demander may be connected in a star shape as shown in FIG. 6B, or may be connected in a net shape as shown in FIG. 6C. Furthermore, you may connect in the aspect which compounded these.
FIG. 7 is a diagram illustrating an example of a power supplier and demander connected via a power supply and demand line different from a plurality of other power consumers. In FIG. 7, the bidirectional DC / DC converter 712 moves power between the power supply and demand lines W1, W2, and W3 in the connection mode between power supply and demand houses as shown in FIG. 6C, for example. It can mediate the power supply and demand between other power suppliers and suppliers.

産業上の利用の可能性Industrial applicability

本発明によれば、複数の電力需給家が、電力需給制御機器により相互接続されて構成された、従来の電力系統に拠らない電力システムを提供することができる。  ADVANTAGE OF THE INVENTION According to this invention, the electric power system which does not depend on the conventional electric power grid | system which comprised the some electric power supplier and demander mutually connected by the electric power supply-demand control apparatus can be provided.

Claims (5)

1つまたは複数の発電機器、1つまたは複数の蓄電機器および1つまたは複数の電力消費機器のうちから選ばれた少なくとも1つの機器と、電力需給制御機器とを備えた電力需給家の複数が相互接続されてなる電力システムにおいて、
前記電力を受け取り、
当該電力需給家において電力余剰が生じる場合には、他の電力需給家に電力を渡す、
ことを特徴とする電力システム。
A plurality of power suppliers and demanders comprising at least one device selected from one or more power generation devices, one or more power storage devices and one or more power consumption devices, and a power supply and demand control device In the interconnected power system,
Receiving the power,
When power surplus occurs in the power supplier and demander, power is delivered to other power supplier and demander.
A power system characterized by that.
1つまたは複数の発電機器、1つまたは複数の蓄電機器および1つまたは複数の電力消費機器のうちから選ばれた少なくとも1つの機器と、電力需給制御機器とを備えた電力需給家の複数が相互接続されてなる電力システムにおいて、
前記複数の電力需給家は、複数の群に区分され、
各群に属する電力需給制御機器は、
当該群において電力不足が生じるか否か、または電力余剰が生じるか否かを判断し、
当該群において電力不足が生じる場合には、前記発電機器および/または前記蓄電機器を備えた電力需給家が属する他の群から電力を受け取り、
当該群において電力余剰が生じる場合には、他の群に電力を渡す、
ことを特徴とする電力システム。
A plurality of power suppliers and demanders comprising at least one device selected from one or more power generation devices, one or more power storage devices and one or more power consumption devices, and a power supply and demand control device In the interconnected power system,
The plurality of power suppliers and demanders are divided into a plurality of groups,
Electric power supply and demand control equipment belonging to each group
Determine whether there is a power shortage or surplus in the group,
When power shortage occurs in the group, it receives power from another group to which the power supplier and demander equipped with the power generation device and / or the power storage device belongs,
If there is a power surplus in the group, pass power to the other group,
A power system characterized by that.
複数の前記電力需給家は、分枝状電力需給線路、数珠つなぎ状電力需給線路、放射状電力需給線路、網状電力需給線路またはこれらを組み合わせた電力需給線路に接続されていることを特徴とする請求項1または2に記載の電力システム。The plurality of electric power suppliers and demanders are connected to a branched electric power supply and demand line, a daisy-chain electric power supply and demand line, a radial electric power supply and demand line, a mesh electric power supply and demand line, or a combination of these electric power supply and demand lines Item 3. The power system according to Item 1 or 2. 前記電力需給制御機器は、他の電力需給家の前記電力需給制御機器との間で電力の需給情報のやり取りをデータ通信ネットワークを介して行うことを特徴とする請求項1から3の何れかに記載の電力システム。4. The power supply and demand control device exchanges power supply and demand information with the power supply and demand control device of another power supplier and demander via a data communication network. The described power system. 複数の前記電力需給家は、相互にDC接続されていることを特徴とする請求項1から4の何れかに記載の電力システム。The power system according to any one of claims 1 to 4, wherein the plurality of power suppliers and demanders are DC-connected to each other.
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