JPH06327146A - Dc power collecting/distributing system - Google Patents
Dc power collecting/distributing systemInfo
- Publication number
- JPH06327146A JPH06327146A JP5130083A JP13008393A JPH06327146A JP H06327146 A JPH06327146 A JP H06327146A JP 5130083 A JP5130083 A JP 5130083A JP 13008393 A JP13008393 A JP 13008393A JP H06327146 A JPH06327146 A JP H06327146A
- Authority
- JP
- Japan
- Prior art keywords
- power
- distribution line
- converter
- direct current
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直流集配電システムに
関する。更に詳述すると、本発明は電力輸送分野におけ
る配電方式として分散型電源の安定かつ効率的な連係手
段及び直流による電気の有効な利用手段を与えることが
できる直流集配電システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC power collection and distribution system. More specifically, the present invention relates to a DC power distribution system capable of providing a stable and efficient linking means for distributed power sources and an effective means of utilizing electricity by DC as a power distribution method in the field of power transportation.
【０００２】[0002]
【従来の技術】従来の分散型電源の交流配電線への連係
は、太陽光発電、燃料電池及び電力貯蔵装置などの直流
発電装置については直流−交流インバータを介して、ま
た、風力発電、水力発電及び回転機系コージェネレーシ
ョンなどの交流発電装置については、回転数を制御する
装置を使用して交流を直接あるいは交流−交流コンバー
タを介して、それぞれ個別に連係される方式をとってい
る。2. Description of the Related Art Conventionally, a distributed power source is linked to an AC distribution line by using a DC-AC inverter for a DC power generator such as a solar power generator, a fuel cell and an electric power storage device, or a wind power generator, a hydropower generator. AC generators such as power generation and rotating machine cogeneration use a system for controlling the number of revolutions so that AC is directly linked to each other or via an AC-AC converter.
【０００３】そして、前記各発電装置は、個々にインバ
ータあるいはコンバータを介して、または回転数制御装
置を使用して交流配電線に連係されることにより、その
発電電力を交流配電線に供給することができる。Each of the power generators is individually connected to an AC distribution line via an inverter or a converter, or by using a rotation speed control device to supply the generated power to the AC distribution line. You can
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
たような従来の分散型電源の交流配電線への連係である
と、次のような欠点が発生する。 （１）小規模な分散型電源に発生しやすい出力変動や高
調波などが交流配電線の電力品質を悪化させること。 （２）個々の分散型電源に保護装置をそれぞれ設け、か
つ交流配電線側の保護装置と動作協調をとる必要があっ
て、保護装置が多数必要となり、かつ動作協調などの調
整が困難であること。 （３）個々の分散型電源の運転状況を交流配電線を管理
する事業者が全て監視・制御することが困難なこと。However, when the conventional distributed power source is linked to the AC distribution line as described above, the following drawbacks occur. (1) Output fluctuations and harmonics that are likely to occur in small-scale distributed power sources deteriorate the power quality of AC distribution lines. (2) Since it is necessary to provide a protection device for each distributed power source and to coordinate operation with the protection device on the side of the AC distribution line, a large number of protection devices are required, and coordination such as operation cooperation is difficult. thing. (3) It is difficult for operators who manage AC distribution lines to monitor and control the operating status of each distributed power source.
【０００５】そこで、本発明は、分散型電源の安定かつ
効率的な連係を行うとともに、直流による電気の有効な
利用を可能とした直流集配電システムを提供することを
目的とする。Therefore, an object of the present invention is to provide a direct current collecting and distributing system which enables stable and efficient cooperation of distributed power sources and effective use of electricity by direct current.
【０００６】[0006]
【課題を解決するための手段】かかる目的を達成するた
め、本発明の直流集配電システムは、直流負荷が接続さ
れた直流配電線と、交流配電線からの交流を直流に変換
して直流配電線に供給し、あるいは直流配電線からの直
流を交流に変換して交流配電線に供給できる双方向電力
変換器と、直流発電装置からの直流を変換して直流配電
線に供給する直流−直流コンバータと、交流発電装置か
らの交流を直流に変換して直流配電線に供給する交流−
直流コンバータと、直流配電線に余剰電力が発生したと
きに双方向電力変換器の動作を制御し、双方向電力変換
器により余剰電力を交流変換して交流配電線に逆送電さ
せるようにした制御手段とを備えるようにしている。In order to achieve such an object, a direct current collecting and distributing system of the present invention includes a direct current distribution line to which a direct current load is connected and a direct current distribution by converting alternating current from the alternating current distribution line into direct current. A bidirectional power converter that can be supplied to an electric wire or can convert a direct current from a direct current distribution line into an alternating current and supply it to an alternating current distribution line, and a direct current-direct current that converts the direct current from a direct current generator to supply it to a direct current distribution line. AC that converts AC from the converter and AC generator to DC and supplies to DC distribution line
Control that controls the operation of the bidirectional power converter when surplus power is generated in the DC converter and the DC distribution line, converts the surplus power into AC by the bidirectional power converter, and transmits the reverse power to the AC distribution line. And means.
【０００７】[0007]
【作用】したがって、交流配電線とは双方向電力変換器
を介して直流配電線が連係される。また、交流発電装置
及び直流発電装置等の分散型電源からの発電量と直流負
荷で消費される電力量とが潮流制御手段により監視され
ており、直流負荷の消費電力量より分散型電源の発電量
が大い場合には、直流配電線２における余剰電力を電力
コンバータを介して三相交流配電線に逆送電できる。Therefore, the DC distribution line is linked to the AC distribution line via the bidirectional power converter. Further, the amount of power generation from the distributed power sources such as the AC power generator and the DC power generator and the amount of power consumed by the DC load are monitored by the power flow control means, and the power generation of the distributed power source is calculated based on the power consumption of the DC load. When the amount is large, surplus power in the DC distribution line 2 can be reversely transmitted to the three-phase AC distribution line via the power converter.
【０００８】[0008]
【実施例】以下、本発明の構成を図面に示す実施例に基
づいて詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to the embodiments shown in the drawings.
【０００９】図１に、本発明の直流集配電システムの実
施例を示す。この直流集配電システムは、直流負荷１
ａ，１ｂが接続された直流配電線２と、双方向電力変換
器３と、直流−直流コンバータ４と、交流−直流コンバ
ータ５と、潮流制御手段６とを備えている。FIG. 1 shows an embodiment of the DC current collection and distribution system of the present invention. This DC power collection and distribution system uses a DC load 1
It includes a DC distribution line 2 to which a and 1b are connected, a bidirectional power converter 3, a DC-DC converter 4, an AC-DC converter 5, and a power flow control means 6.
【００１０】直流配電線２には、直流負荷１ａ，１ｂが
それぞれ接続されるとともに、双方向電力変換器３を介
して三相交流配電線７が接続されている。この三相交流
配電線７は、集配用変圧器８を介して三相高圧交流配電
線９に接続されている。また、双方向電力変換器３は、
ＰＷＭ制御方式を採用した自励式電圧型であって、交流
配電線７からの交流を直流に変換して前記直流配電線２
に供給し、あるいは直流配電線２からの直流を交流に変
換して前記交流配電線７に供給できるように構成されて
いる。また、直流−直流コンバータ４は、直流配電線２
と直流発電装置１０との間に接続されており、かつ直流
発電装置１０からの直流を変換して直流配電線２に供給
する装置で、直流発電装置１０の発電効率が最適になる
ような電圧制御を行えるようになっている。交流−直流
コンバータ５は、直流配電線２と交流発電装置１１との
間に接続されており、かつ交流発電装置１１からの交流
を直流に変換して直流配電線２に供給できる装置で、交
流発電装置１１の発電効率が最適になるような電圧・周
波数制御を行えるようになっている。潮流制御手段６
は、処理装置６ａ、交流電圧・電流検出器６ｂ及び直流
電圧検出器６ｃからなり、交流電圧・電流検出器６ｂ及
び直流電圧検出器６ｃからの情報を処理装置６ａに取り
込み、処理装置６ａが直流配電線２の直流電圧を一定と
し、交流配電線７の潮流の力率を一定とするよう前記双
方向電力変換器３を制御できるようになっている。すな
わち、潮流制御手段６の処理装置６ａは、コンピュータ
にＡＤ変換器等の周辺装置を設けたもので構成すればよ
く、直流配電線２に余剰電力が発生して直流電圧が上昇
したときに双方向電力変換器３の動作を制御し、双方向
電力変換器３により余剰電力を交流変換して、力率を一
定として三相交流配電線７に逆送電させる装置である。DC loads 1a and 1b are connected to the DC distribution line 2, and a three-phase AC distribution line 7 is connected via a bidirectional power converter 3. The three-phase AC distribution line 7 is connected to a three-phase high-voltage AC distribution line 9 via a transformer 8 for collection and distribution. In addition, the bidirectional power converter 3 is
It is a self-excited voltage type adopting a PWM control system, and converts the alternating current from the alternating current distribution line 7 into a direct current, and the direct current distribution line 2
Is supplied to the AC distribution line 7 or the DC from the DC distribution line 2 is converted into AC and supplied to the AC distribution line 7. In addition, the DC-DC converter 4 is the DC distribution line 2
Is a device that is connected between the DC power generator 10 and the DC power generator 10 and converts the DC from the DC power generator 10 to the DC distribution line 2 so that the power generation efficiency of the DC power generator 10 is optimized. It can be controlled. The AC-DC converter 5 is a device that is connected between the DC distribution line 2 and the AC generator 11, and is capable of converting the AC from the AC generator 11 into DC and supplying the DC to the DC distribution line 2. The voltage / frequency control that optimizes the power generation efficiency of the power generation device 11 can be performed. Power flow control means 6
Is composed of a processing device 6a, an AC voltage / current detector 6b and a DC voltage detector 6c. The information from the AC voltage / current detector 6b and the DC voltage detector 6c is taken into the processing device 6a, and The bidirectional power converter 3 can be controlled so that the DC voltage of the distribution line 2 is constant and the power factor of the power flow of the AC distribution line 7 is constant. That is, the processing device 6a of the power flow control means 6 may be configured by providing a computer with a peripheral device such as an AD converter, and when the excess power is generated in the DC distribution line 2 and the DC voltage rises, both are processed. This is a device that controls the operation of the directional power converter 3, converts the surplus power into an alternating current by the bidirectional power converter 3, and transmits the reverse power to the three-phase alternating current distribution line 7 with a constant power factor.
【００１１】このように構成された直流集配電システム
において、直流−直流コンバータ４は、直流発電装置１
０の発電効率が最適になるように電圧制御を行ってい
る。また、交流−直流コンバータ５も、交流発電装置１
１の発電効率が最適になるように電圧・周波数制御を行
っている。In the DC power collection and distribution system configured as described above, the DC-DC converter 4 includes the DC power generator 1
Voltage control is performed so that the power generation efficiency of 0 is optimum. Further, the AC-DC converter 5 is also the AC generator 1
The voltage and frequency are controlled so that the power generation efficiency of 1 is optimal.
【００１２】このような状態で、潮流制御手段６の処理
装置６ａは、交流電圧・電流検出器６ｂからの電圧・電
流検出信号と、直流電圧検出器６ｃからの電圧検出信号
より、交流配電線７の潮流と直流配電線２の電圧を監視
している。In such a state, the processing device 6a of the power flow control means 6 uses the voltage / current detection signal from the AC voltage / current detector 6b and the voltage detection signal from the DC voltage detector 6c to determine the AC distribution line. It monitors the tidal current of 7 and the voltage of DC distribution line 2.
【００１３】ここで、直流発電装置１０及び交流発電装
置１１の発電量が直流負荷１ａ，１ｂの負荷量より大き
く、直流電圧が上昇した場合、処理装置６ａは、双方向
電力変換器３の動作を逆変換器にする。この結果、双方
向電力変換器３の逆変換動作により、直流配電線２から
の直流は、交流に変換されて前記交流配電線７に逆送電
されることになる。When the amount of power generated by the DC generator 10 and the AC generator 11 is larger than the load of the DC loads 1a and 1b and the DC voltage rises, the processing device 6a operates the bidirectional power converter 3. Is an inverse converter. As a result, due to the reverse conversion operation of the bidirectional power converter 3, the direct current from the direct current distribution line 2 is converted into alternating current and is reversely transmitted to the alternating current distribution line 7.
【００１４】一方、直流発電装置１０及び交流発電装置
１１の発電量が直流負荷１ａ，１ｂの負荷量より小さ
く、直流電圧が下降した場合、処理装置６ａは、双方向
電力変換器３の動作を順変換器にする。この結果、双方
向電力変換器３の順変換動作により、前記三相交流配電
線７からの交流は直流に変換され、電力が矢印Ｐの向き
に前記直流配電線２に向かって流れ込むことになる。On the other hand, when the amount of power generated by the DC generator 10 and the AC generator 11 is smaller than the load of the DC loads 1a, 1b and the DC voltage drops, the processor 6a causes the bidirectional power converter 3 to operate. Use a forward converter. As a result, by the forward conversion operation of the bidirectional power converter 3, the alternating current from the three-phase alternating current distribution line 7 is converted into direct current, and the power flows in the direction of arrow P toward the direct current distribution line 2. .
【００１５】上記実施例は、直流配電線２を介して多数
多用な分散型電源（例えば、直流発電装置１０及び交流
発電装置１１）を接続することにより、小規模の分散型
電源に発生しやすい出力変動や高調波などの配電線の電
力品質を悪化させる要因を均一させることができ、かつ
三相交流配電線７に連係される唯一の装置である双方向
電力変換器３において、一括して効率よく三相交流配電
線７に流れ込む電流の力率を改善し、高調波を低減でき
る。In the above embodiment, a large number of dispersed power sources (for example, the DC power generator 10 and the AC power generator 11) are connected through the DC power distribution line 2 to easily generate a small distributed power source. In the bidirectional power converter 3, which is the only device that can make uniform the factors that deteriorate the power quality of the distribution line, such as output fluctuations and harmonics, and is the only device linked to the three-phase AC distribution line 7, It is possible to efficiently improve the power factor of the current flowing into the three-phase AC distribution line 7 and reduce harmonics.
【００１６】また、上記実施例は、個々の分散型電源に
保護装置を設置する必要がなく、双方向電力変換器３に
のみ保護装置を設置するだけでよいため、保護協調の複
雑な調整や保護装置を少なくできる。Further, in the above embodiment, it is not necessary to install a protection device in each distributed power supply, and it is sufficient to install the protection device only in the bidirectional power converter 3, so that complicated adjustment of protection coordination and The number of protective devices can be reduced.
【００１７】さらに、三相高圧交流配電線９を管理する
電気事業者は、配電線搬送方式あるいは通信線方式によ
り交流配電線に設置された開閉器の遠隔制御などを行っ
ているが、これと同様に双方向電力変換器３と通信する
ことにより、直流集配電システムの運転状態を監視・制
御することができる。Further, the electric utility that manages the three-phase high-voltage AC distribution line 9 performs remote control of the switch installed in the AC distribution line by a distribution line carrier system or a communication line system. Similarly, by communicating with the bidirectional power converter 3, the operating state of the DC power collection and distribution system can be monitored and controlled.
【００１８】尚、上述の実施例は本発明の好適な実施の
一例ではあるがこれに限定されるものではなく本発明の
要旨を逸脱しない範囲において種々変形実施可能であ
る。例えば、直流発電装置１０の出力電圧が直流配電線
２の電圧に合致すれば、直流−直流コンバータ４を省略
してもよい。It should be noted that the above-mentioned embodiment is an example of the preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, if the output voltage of the DC generator 10 matches the voltage of the DC distribution line 2, the DC-DC converter 4 may be omitted.
【００１９】[0019]
【発明の効果】以上の説明より明らかなように、本発明
によれば、次のような効果がある。 （１）直流配電線介して多数多用な分散型電源を接続
し、三相交流配電線には双方向電力変換器を介して直流
配電線が接続された構成なので、小規模な分散型電源に
発生しやすい出力変動や高調波などの影響が交流配電線
に及ばない。 （２）個々の分散型電源に保護装置を設ける必要がな
く、双方向電力変換器にのみ保護装置を設けるだけでよ
いため、保護装置を少なくでき、かつ動作協調などの調
整が簡単になる。 （３）交流配電線を管理する事業者は、双方向電力変換
器を介して直流配電線に接続された分散型電源の運転状
況をまとめて監視・制御することができる。As is apparent from the above description, the present invention has the following effects. (1) A large number of distributed power sources are connected via a DC distribution line, and a DC distribution line is connected to a three-phase AC distribution line via a bidirectional power converter. Output fluctuations and harmonics that are likely to occur do not affect the AC distribution line. (2) Since it is not necessary to provide a protection device for each distributed power supply, and only the protection device needs to be provided for the bidirectional power converter, the number of protection devices can be reduced and adjustments such as operation coordination can be simplified. (3) A business operator who manages an AC distribution line can collectively monitor and control the operation status of distributed power sources connected to a DC distribution line via a bidirectional power converter.
【図１】本発明の直流集配電システムの実施例を示すブ
ロック図である。FIG. 1 is a block diagram showing an embodiment of a DC current collection and distribution system of the present invention.
１ａ，１ｂ 直流負荷 ２ 直流配電線 ３ 双方向電力変換器 ４ 直流−直流コンバータ ５ 交流−直流コンバータ ６ 潮流制御手段 1a, 1b DC load 2 DC distribution line 3 Bidirectional power converter 4 DC-DC converter 5 AC-DC converter 6 Power flow control means
Claims (1)
流配電線からの交流を直流に変換して前記直流配電線に
供給し、あるいは前記直流配電線からの直流を交流に変
換して前記交流配電線に供給できる双方向電力変換器
と、直流発電装置からの直流を変換して前記直流配電線
に供給する直流−直流コンバータと、交流発電装置から
の交流を直流に変換して前記直流配電線に供給する交流
−直流コンバータと前記直流配電線に余剰電力が発生し
たときに前記双方向電力変換器の動作を制御し、前記双
方向電力変換器により前記余剰電力を交流変換して前記
交流配電線に逆送電させるようにした制御手段とを備え
たことを特徴とする直流集配電システム。1. A direct current distribution line to which a direct current load is connected and an alternating current from the alternating current distribution line is converted into a direct current and supplied to the direct current distribution line, or a direct current from the direct current distribution line is converted into an alternating current. A bidirectional power converter that can be supplied to the AC distribution line, a DC-DC converter that converts DC from a DC generator to supply the DC distribution line, and an AC from the AC generator to DC. The operation of the bidirectional power converter is controlled when surplus power is generated in the AC-DC converter and the DC distribution line that are supplied to the DC distribution line, and the surplus power is converted to AC by the bidirectional power converter. A direct current collecting and distributing system, comprising: a control unit configured to cause the AC distribution line to reversely transmit power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5130083A JPH06327146A (en) | 1993-05-07 | 1993-05-07 | Dc power collecting/distributing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5130083A JPH06327146A (en) | 1993-05-07 | 1993-05-07 | Dc power collecting/distributing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06327146A true JPH06327146A (en) | 1994-11-25 |
Family
ID=15025578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5130083A Pending JPH06327146A (en) | 1993-05-07 | 1993-05-07 | Dc power collecting/distributing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06327146A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6882062B2 (en) | 2002-01-18 | 2005-04-19 | Heidelberger Druckmaschinen Ag | Power supply management in paper-processing machines |
| WO2008117392A1 (en) | 2007-03-26 | 2008-10-02 | Vpec, Inc. | Power system |
| JP2008301653A (en) * | 2007-06-01 | 2008-12-11 | Fuji Electric Assets Management Co Ltd | Electric power generating system |
| WO2010103650A1 (en) | 2009-03-12 | 2010-09-16 | Vpec株式会社 | Autonomous distributed ac power system |
| WO2011058412A1 (en) * | 2009-11-16 | 2011-05-19 | パナソニック電工株式会社 | Power distribution system |
| WO2012093538A1 (en) * | 2011-01-06 | 2012-07-12 | シャープ株式会社 | Dc power supply system |
| JP2017175918A (en) * | 2012-10-19 | 2017-09-28 | 国立大学法人 東京大学 | Power router, power network system, power interchange method, and program for controlling operation of power router |
-
1993
- 1993-05-07 JP JP5130083A patent/JPH06327146A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6882062B2 (en) | 2002-01-18 | 2005-04-19 | Heidelberger Druckmaschinen Ag | Power supply management in paper-processing machines |
| WO2008117392A1 (en) | 2007-03-26 | 2008-10-02 | Vpec, Inc. | Power system |
| JP2008301653A (en) * | 2007-06-01 | 2008-12-11 | Fuji Electric Assets Management Co Ltd | Electric power generating system |
| WO2010103650A1 (en) | 2009-03-12 | 2010-09-16 | Vpec株式会社 | Autonomous distributed ac power system |
| WO2011058412A1 (en) * | 2009-11-16 | 2011-05-19 | パナソニック電工株式会社 | Power distribution system |
| WO2012093538A1 (en) * | 2011-01-06 | 2012-07-12 | シャープ株式会社 | Dc power supply system |
| JP2012147508A (en) * | 2011-01-06 | 2012-08-02 | Sharp Corp | Dc feeding system |
| JP2017175918A (en) * | 2012-10-19 | 2017-09-28 | 国立大学法人 東京大学 | Power router, power network system, power interchange method, and program for controlling operation of power router |
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