JPH0919066A - Dispersion type power supply - Google Patents
Dispersion type power supplyInfo
- Publication number
- JPH0919066A JPH0919066A JP7183460A JP18346095A JPH0919066A JP H0919066 A JPH0919066 A JP H0919066A JP 7183460 A JP7183460 A JP 7183460A JP 18346095 A JP18346095 A JP 18346095A JP H0919066 A JPH0919066 A JP H0919066A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power supply
- relay
- power system
- control power
- 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
Classifications
-
- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、太陽電池や風力発電
等を利用した発電装置を電力系統と連系運転させると共
に、この電力系統の異常時には発電装置を自立運転させ
る分散形電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distributed power supply device for operating a power generator using a solar cell, wind power generation or the like in an interconnected manner with an electric power system, and for independently operating the power generator when the electric power system is abnormal.
【０００２】[0002]
【従来の技術】病院や学校等の施設では、省エネルギー
化を図るために分散形電源装置を用いる場合がある。分
散形電源装置は、太陽電池や風力発電等を利用した発電
装置を施設内に設置し、この発電装置で発電した電力を
電力系統と連系させて施設内の負荷に供給するものであ
る。また、この分散形電源装置には、電力系統の異常や
故障時に発電装置を自立運転させて非常用の負荷に電力
を供給できるようにしたものがある。2. Description of the Related Art In facilities such as hospitals and schools, a distributed power supply device may be used to save energy. The distributed power supply device installs a power generation device using a solar cell, wind power generation, or the like in the facility, and connects the power generated by this power generation device to the power system to supply the load in the facility. In addition, there is a distributed power supply device in which the power generation device can be operated independently to supply power to an emergency load when an abnormality or failure of the power system occurs.
【０００３】このような分散形電源装置には、発電装置
の発電電圧や供給電流等を測定して表示させることによ
り、この発電装置の発電状態を監視する監視装置が設け
られると共に、電力系統の過電圧や不足電圧等の異常を
検出する保護装置が設けられる。そして、従来の分散形
電源装置では、電力系統の異常時にも動作可能となるよ
うに、これらの監視装置や保護装置の制御電源にＵＰＳ
[Uninterruptible Power Supply]（無停電電源装置）を
使用していた。ＵＰＳは、電力系統の正常時に、この電
力系統の電力を監視装置や保護装置に供給すると共に、
この電力の一部を用いて蓄電池に充電を行い、電力系統
が故障により切り離されると、蓄電池の電力を必要に応
じて交流に変換してから監視装置や保護装置に供給する
ようにした電源装置である。Such a distributed power supply device is provided with a monitoring device for monitoring the power generation state of the power generation device by measuring and displaying the power generation voltage and supply current of the power generation device and at the same time the power system A protection device is provided for detecting abnormalities such as overvoltage and undervoltage. In the conventional distributed power supply device, UPS is used as a control power supply for these monitoring devices and protection devices so that they can operate even when there is an abnormality in the power system.
I was using [Uninterruptible Power Supply]. UPS supplies the power of the power system to the monitoring device and the protection device when the power system is normal, and
A part of this power is used to charge the storage battery, and when the power system is disconnected due to a failure, the power supply device converts the power of the storage battery to alternating current as necessary and then supplies it to the monitoring device and protection device. Is.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記ＵＰＳ
は、電力系統の異常や故障時に、蓄電池に蓄積された電
力のみによって監視装置や保護装置を長時間駆動しなけ
ればならないので、大容量の蓄電池が必要となり、しか
も、この蓄電池の電力を交流に変換して供給するには高
価なインバータ（直流交流変換装置）が必要になる。However, the above-mentioned UPS
Requires a large-capacity storage battery because the monitoring device and the protection device must be driven for a long time only by the power stored in the storage battery when the power system is abnormal or malfunctions. An expensive inverter (DC / AC converter) is required to convert and supply.
【０００５】このため、従来の分散形電源装置では、監
視装置や保護装置の制御電源として大容量の蓄電池とイ
ンバータを備えたＵＰＳを設置しなければならないの
で、システムのコストダウンを図り得ないという問題が
あった。For this reason, in the conventional distributed power supply, since it is necessary to install a UPS having a large-capacity storage battery and an inverter as a control power supply for the monitoring device and the protection device, it is impossible to reduce the system cost. There was a problem.
【０００６】本発明は、かかる事情に鑑みてなされたも
のであり、監視装置や保護装置用の制御電源を電力系統
の異常や故障時に発電装置から供給することにより、高
価なＵＰＳを不要とする分散形電源装置を提供すること
を目的としている。The present invention has been made in view of the above circumstances, and eliminates the need for an expensive UPS by supplying a control power supply for a monitoring device and a protection device from a power generator when the power system is abnormal or malfunctions. An object is to provide a distributed power supply device.
【０００７】[0007]
【課題を解決するための手段】即ち、本発明は、上記課
題を解決するために、電力系統に併設して発電装置が
設けられると共に、これら電源系統及び／又は発電装置
の保護及び／又は監視を行う管理装置が設けられ、電力
系統の正常時には発電装置を連系運転させてこれら電力
系統と発電装置から一般負荷に電力を供給し、電力系統
の異常時には発電装置を自立運転させて自立運転負荷に
電力を供給する分散形電源装置において、電力系統の正
常時には電力系統と発電装置から管理装置に電力を供給
し、電力系統の異常時には発電装置から管理装置に電力
を供給する制御電源切換回路が設けられたことを特徴と
する。[Means for Solving the Problems] That is, in order to solve the above-mentioned problems, according to the present invention, a power generator is provided alongside a power system, and the power supply system and / or the power generator are protected and / or monitored. A management device is installed to operate the power generators when the power system is normal and supply power to the general load from the power system and the power generators.When the power system is abnormal, the power generators are operated independently to operate independently. In a distributed power supply device that supplies power to a load, a control power supply switching circuit that supplies power from the power system and power generator to the management device when the power system is normal, and supplies power from the power generator to the management device when the power system is abnormal Is provided.
【０００８】また、前記の手段の管理装置が電力系
統の異常を検出し線路をしゃ断する保護装置を含むこと
を特徴とする。Further, the management device of the above means is characterized by including a protection device for detecting an abnormality in the power system and cutting off the line.
【０００９】さらに、前記又はの手段の管理装置
が発電装置の発電状態を測定する測定装置とこの測定装
置で測定したデータを表示する表示装置とからなる監視
装置を含むことを特徴とする。Further, the managing device of the above or other means is characterized by including a monitoring device including a measuring device for measuring a power generation state of the power generating device and a display device for displaying data measured by the measuring device.
【００１０】[0010]
【作用】の手段によれば、管理装置の制御電源を、電
力系統の正常時には従来と同様に電力系統と発電装置が
連系して供給するが、電力系統の故障や異常時には自立
運転を行う発電装置が供給を行う。従って、制御電源用
に別途ＵＰＳを設けて大容量の蓄電池によるバックアッ
プを行う必要がなくなるだけでなく、発電装置を自立運
転に切り換えるまでの間に一時的に制御電源のバックア
ップを行うための蓄電池も小容量のもので足りるように
なる。According to the means, the control power source of the management device is supplied by the power system and the power generator in the same manner as in the conventional system when the power system is normal, but is operated independently when the power system fails or is abnormal. The generator sets supply. Therefore, it is not only necessary to provide a separate UPS for the control power supply to back up with a large-capacity storage battery, but also to use a storage battery for temporarily backing up the control power supply until the generator is switched to the independent operation. A small capacity is enough.
【００１１】また、の手段では、管理装置として電力
系統の過電圧や不足電圧等の異常を検出し線路をしゃ断
する保護装置が含まれる場合を示す。In the above means, there is shown a case where the management device includes a protection device for detecting an abnormality such as an overvoltage or an undervoltage in the power system and cutting off the line.
【００１２】さらに、の手段によれば、管理装置とし
て発電装置の発電状態を測定する測定装置とこの測定装
置で測定したデータを表示する表示装置とからなる監視
装置が含まれる場合を示す。Further, according to the above means, there is shown a case in which the management device includes the monitoring device including the measuring device for measuring the power generation state of the power generating device and the display device for displaying the data measured by the measuring device.
【００１３】[0013]
【実施例】以下、本発明の具体的実施例について図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は本発明の一実施例を示すものであっ
て、分散形電源装置の構成を示す回路ブロック図であ
る。FIG. 1 shows an embodiment of the present invention and is a circuit block diagram showing the structure of a distributed power supply device.
【００１５】本実施例は、病院や学校等の施設に設置し
た、太陽電池を利用する分散形電源装置について説明す
る。電力系統は、受電点１を通して施設内に引き入れら
れ、高速しゃ断器２と配電用変圧器３を介して低圧母線
４に接続される。電力系統は、電力会社の配電用変電所
から例えば６．６ｋＶ三相３線式の高圧配電線により施
設に供給される。高速しゃ断器２は、特に過大な電流が
流れた場合に高圧配電線を高速に切り離して機器を保護
するためのしゃ断器である。配電用変圧器３は、電力系
統の６．６ｋＶの電圧を２００Ｖに降圧して低圧母線４
に供給する変圧器である。低圧母線４には、配線用しゃ
断器（ＭＣＣＢ）５を介して一般負荷６が接続されてい
る。一般負荷６は、この施設内で通常時に使用される負
荷である。配線用しゃ断器５は、分電盤等に配備された
過電流しゃ断器であり、過負荷や短絡事故時の過電流を
しゃ断するために用いられる。In this embodiment, a distributed power supply device using solar cells installed in facilities such as hospitals and schools will be described. The power system is drawn into the facility through a power receiving point 1 and is connected to a low voltage bus bar 4 via a high speed circuit breaker 2 and a distribution transformer 3. The electric power system is supplied to the facility from a distribution substation of an electric power company, for example, by a 6.6 kV three-phase three-wire high-voltage distribution line. The high-speed circuit breaker 2 is a circuit breaker for disconnecting the high-voltage distribution line at high speed to protect the device, especially when an excessive current flows. The distribution transformer 3 lowers the voltage of 6.6 kV of the electric power system to 200 V to lower the low voltage bus 4
It is a transformer to supply to. A general load 6 is connected to the low voltage bus bar 4 via a circuit breaker (MCCB) 5. The general load 6 is a load normally used in this facility. The wiring breaker 5 is an overcurrent breaker provided on a distribution board or the like, and is used to cut off an overcurrent at the time of an overload or short circuit accident.
【００１６】上記施設には、野外や屋上等の太陽光が照
射する場所に太陽電池アレイ７が設置されている。太陽
電池アレイ７は、太陽光を受光することにより直流電力
を発電する太陽電池を平面状に多数配列させたものであ
る。また、この太陽電池アレイ７には、操作によってＯ
Ｎ／ＯＦＦする開閉器８を介して太陽電池用蓄電池９が
並列に接続されている。従って、開閉器８をＯＮにする
と、太陽電池アレイ７が必要以上の電力を発電した場合
には、余剰電力を太陽電池用蓄電池９に蓄積すると共
に、太陽電池アレイ７の発電電力が不足する場合に、こ
の太陽電池用蓄電池９から電力を供給することができ
る。この太陽電池アレイ７で発電された直流電力、又
は、太陽電池用蓄電池９に蓄積された直流電力は、イン
バータ（直流交流変換装置）１０で２００Ｖの交流に変
換されて出力され、これによって交流電力を供給する発
電装置が構成される。そして、インバータ１０の交流出
力は、電磁接触器（ＭＳ）１１，１２と配線用しゃ断器
１３，１４を介して上記低圧母線４に供給されると共
に、電磁接触器１５と配線用しゃ断器１６を介して自立
運転負荷１７に供給されるようになっている。自立運転
負荷１７は、電力系統の停電時に使用される負荷であ
り、通常は停電時のために施設内に設けられたコンセン
トに接続される非常用の機器である。電磁接触器１１，
１２，１５は、継電器によってＯＮ／ＯＦＦが制御され
る開閉器であり、配線用しゃ断器１３，１４，１６は、
上記配線用しゃ断器５と同様の過電流しゃ断器である。
なお、太陽電池用蓄電池９は、ＤＣ−ＤＣコンバ−タ３
０を介して直接直流電力を供給することもできる。In the above facility, the solar cell array 7 is installed in a place where sunlight is radiated, such as outdoors or on the rooftop. The solar cell array 7 is an array of a large number of solar cells that generate direct current power by receiving sunlight. In addition, when the solar cell array 7 is operated, the O
A storage battery 9 for a solar cell is connected in parallel via a switch 8 which is turned off / on. Therefore, when the switch 8 is turned ON, when the solar cell array 7 generates more power than necessary, surplus power is accumulated in the solar battery storage battery 9 and the generated power of the solar cell array 7 is insufficient. In addition, electric power can be supplied from the storage battery 9 for solar cells. The DC power generated by the solar cell array 7 or the DC power stored in the storage battery 9 for the solar cell is converted into 200V AC by the inverter (DC / AC converter) 10 and output, whereby the AC power is generated. A power generation device for supplying the Then, the AC output of the inverter 10 is supplied to the low-voltage bus bar 4 via the electromagnetic contactors (MS) 11 and 12 and the circuit breakers 13 and 14, and the electromagnetic contactor 15 and the circuit breaker 16 are connected. It is adapted to be supplied to the self-sustained operation load 17 via the. The self-sustained operation load 17 is a load used during a power failure of the power system, and is usually an emergency device connected to an outlet provided in the facility for a power failure. Electromagnetic contactor 11,
12, 15 are switches whose ON / OFF is controlled by a relay, and the wiring breakers 13, 14, 16 are
This is an overcurrent breaker similar to the wiring breaker 5 described above.
Incidentally, the storage battery 9 for the solar cell is the DC-DC converter 3
It is also possible to supply DC power directly via 0.
【００１７】上記高速しゃ断器２と配電用変圧器３との
間の線路には、計器用変圧器（ＰＴ）１８を介して保護
継電器１９が接続されると共に、中性点電圧検出器（Ｐ
Ｄ）２０を介して地絡過電圧継電器（ＯＶＧＲ）２１が
接続されている。保護継電器１９は、計器用変圧器１８
を介して電力系統の電圧と周波数を入力することによ
り、この電力系統の故障や異常を検出する保護装置であ
り、過電圧継電器（ＯＶＲ）と不足電圧継電器（ＵＶ
Ｒ）と周波数上昇継電器（ＯＦＲ）と周波数低下継電器
（ＵＦＲ）とからなる。また、地絡過電圧継電器２１
は、中性点電圧検出器２０のコンデンサ２０ａ…と計器
用変圧器２０ｂを介して電力系統の三相３線式の中性点
の電圧を入力することにより、この中性点の過電圧によ
る異常を検出する保護装置である。そして、これらの保
護継電器１９又は地絡過電圧継電器２１が電力系統の異
常を検出すると、上記電磁接触器１２がＯＦＦとなる。
ただし、これらの保護継電器１９と地絡過電圧継電器２
１は、動作のために直流電源を必要とする。A protective relay 19 is connected to the line between the high-speed circuit breaker 2 and the distribution transformer 3 via an instrument transformer (PT) 18 and a neutral point voltage detector (P).
A ground fault overvoltage relay (OVGR) 21 is connected via D) 20. The protective relay 19 is an instrument transformer 18
It is a protective device that detects a failure or abnormality of the power system by inputting the voltage and frequency of the power system via the power system, and includes an overvoltage relay (OVR) and an undervoltage relay (UV
R), a frequency up relay (OFR) and a frequency down relay (UFR). In addition, the ground fault overvoltage relay 21
Is a three-phase three-wire type neutral point voltage of the power system input via the capacitors 20a of the neutral point voltage detector 20 and the instrument transformer 20b. It is a protective device for detecting. When the protective relay 19 or the ground fault overvoltage relay 21 detects an abnormality in the power system, the electromagnetic contactor 12 is turned off.
However, these protective relays 19 and ground fault overvoltage relays 2
No. 1 requires a DC power supply for operation.
【００１８】上記インバータ１０は、測定装置２２によ
って入出力の電圧と電流が測定されるようになってい
る。測定装置２２は、インバータ１０の入力線路上の電
圧を電圧検出器２２ａによって測定すると共に、この入
力線路を流れる電流の変化を変流器２２ｂと電流検出器
２２ｃによって測定し、また、インバータ１０の出力線
路上の電圧を電圧検出器２２ｄによって測定すると共
に、この入力線路を流れる電流を変流器２２ｅと電流検
出器２２ｆによって測定する。そして、これら電圧検出
器２２ａ，２２ｄと電流検出器２２ｃ，２２ｆが測定し
た電圧と電流の各値は、測定処理装置２２ｇに入力され
て処理される。また、この測定処理装置２２ｇで処理さ
れたデータは、表示装置２３に送られて随時表示され、
太陽電池アレイ７の発電状態や供給電力等を監視できる
ようになっている。ただし、この測定処理装置２２ｇ
は、処理動作のために直流電源を必要とし、表示装置２
３も、表示動作のための交流電源を必要とする。The inverter 10 is designed so that the measuring device 22 measures the input and output voltages and currents. The measuring device 22 measures the voltage on the input line of the inverter 10 by the voltage detector 22a, measures the change of the current flowing through this input line by the current transformer 22b and the current detector 22c, and also measures the voltage of the inverter 10 by the current detector 22b. The voltage on the output line is measured by the voltage detector 22d, and the current flowing through the input line is measured by the current transformer 22e and the current detector 22f. Then, the respective values of the voltage and the current measured by the voltage detectors 22a and 22d and the current detectors 22c and 22f are input to and processed by the measurement processing device 22g. Further, the data processed by the measurement processing device 22g is sent to the display device 23 and displayed at any time,
The power generation state of the solar cell array 7, supply power, and the like can be monitored. However, this measurement processing device 22g
Requires a DC power source for processing operation, and the display device 2
3 also requires an AC power supply for display operation.
【００１９】本実施例の分散形電源装置には、上記測定
装置２２と表示装置２３からなる監視装置と、上記保護
継電器１９及び地絡過電圧継電器２１からなる保護装置
に制御電源を供給するために、制御電源切換用継電器２
４と制御電源用整流器２５と制御電源用蓄電池２６が設
けられている。制御電源切換用継電器２４は、入力側に
第１接点２４ａと第２接点２４ｂを有し、電磁部２４ｃ
の制御によって出力側の切換接点２４ｄがこれら第１接
点２４ａと第２接点２４ｂのいずれかに接続されるよう
になった継電器である。そして、入力側の第１接点２４
ａが変圧器２７と配線用しゃ断器２８を介して上記低圧
母線４に接続されると共に、第２接点２４ｂが変圧器２
９を介して上記電磁接触器１５と配線用しゃ断器１６の
間の線路上に接続される。また、電磁部２４ｃは、常時
は切換接点２４ｄを第１接点２４ａに接続し、変圧器２
７の二次側の電圧が所定値よりも低下すると、この切換
接点２４ｄを第２接点２４ｂに接続するようになってい
る。配線用しゃ断器２８も、上記配線用しゃ断器５と同
様の過電流しゃ断器である。In the distributed power supply device of this embodiment, in order to supply control power to the monitoring device including the measuring device 22 and the display device 23, and the protective device including the protective relay 19 and the ground fault overvoltage relay 21. , Control power switching relay 2
4, a control power supply rectifier 25, and a control power supply storage battery 26 are provided. The control power source switching relay 24 has a first contact 24a and a second contact 24b on the input side, and has an electromagnetic section 24c.
Is a relay in which the switching contact 24d on the output side is connected to either the first contact 24a or the second contact 24b under the control of. Then, the first contact 24 on the input side
a is connected to the low-voltage bus bar 4 via the transformer 27 and the wiring breaker 28, and the second contact 24b is connected to the transformer 2
It is connected via a line 9 between the electromagnetic contactor 15 and the wiring breaker 16. In addition, the electromagnetic unit 24c normally connects the switching contact 24d to the first contact 24a, so that the transformer 2
When the voltage on the secondary side of 7 falls below a predetermined value, this switching contact 24d is connected to the second contact 24b. The wiring breaker 28 is also an overcurrent breaker similar to the wiring breaker 5 described above.
【００２０】制御電源切換用継電器２４の出力側の切換
接点２４ｄは、表示装置２３の電源入力に接続されると
共に、制御電源用整流器２５を介して保護継電器１９と
地絡過電圧継電器２１と測定処理装置２２ｇの電源入力
にそれぞれ接続される。また、この制御電源用整流器２
５の出力には、制御電源用蓄電池２６が接続されてい
る。The switching contact 24d on the output side of the control power source switching relay 24 is connected to the power source input of the display device 23, and through the control power source rectifier 25, the protective relay 19, the ground fault overvoltage relay 21 and the measurement process. Each is connected to the power input of device 22g. Moreover, this rectifier 2 for control power supply
A storage battery 26 for a control power supply is connected to the output of 5.
【００２１】上記構成の分散形電源装置の動作を説明す
る。ここで、高速しゃ断器２と配線用しゃ断器５，１
４，１６，２８は、常時ＯＮしているものとする。電力
系統の正常時には、電磁接触器１１，１２と配線用しゃ
断器１３がＯＮとなり、電磁接触器１５がＯＦＦとな
る。従って、低圧母線４には、受電点１からの電力系統
の電力が配電用変圧器３を介して供給されると共に、太
陽電池アレイ７の発電電力がインバータ１０を介して供
給されるので、これらの連系により一般負荷６に２００
Ｖの交流電力が供給される。また、この電力系統の正常
時には、制御電源切換用継電器２４の切換接点２４ｄが
第１接点２４ａに接続されるので、低圧母線４の交流電
力が変圧器２７により単相１００Ｖに降圧されてこの制
御電源切換用継電器２４を介し表示装置２３に供給され
ると共に、この制御電源切換用継電器２４を介した１０
０Ｖの交流電力が制御電源用整流器２５で直流電力に変
換されて保護継電器１９と地絡過電圧継電器２１と測定
処理装置２２ｇに供給される。なお、制御電源用蓄電池
２６は、この制御電源用整流器２５から出力される直流
電力により常時充電される。また、開閉器８もＯＦＦに
されて太陽電池用蓄電池９が切り離される。ただし、こ
の太陽電池用蓄電池９は、電力系統の正常時の適当な時
期に図示しない充電器によって充電される。The operation of the distributed power supply device having the above configuration will be described. Here, high-speed circuit breaker 2 and circuit breakers 5, 1
It is assumed that 4, 16 and 28 are always on. When the power system is normal, the electromagnetic contactors 11 and 12 and the wiring breaker 13 are turned on, and the electromagnetic contactor 15 is turned off. Therefore, the low-voltage bus bar 4 is supplied with the power of the power system from the power receiving point 1 via the distribution transformer 3, and the generated power of the solar cell array 7 via the inverter 10. General load 6 to 200 due to the interconnection of
AC power of V is supplied. Further, when the power system is normal, the switching contact 24d of the control power source switching relay 24 is connected to the first contact 24a, so that the AC power of the low voltage bus 4 is stepped down by the transformer 27 to single-phase 100V. The power is supplied to the display device 23 via the power switching relay 24, and the power is switched via the control power switching relay 24.
AC power of 0 V is converted into DC power by the control power supply rectifier 25 and supplied to the protection relay 19, the ground fault overvoltage relay 21, and the measurement processing device 22g. The control power storage battery 26 is constantly charged by the DC power output from the control power rectifier 25. Further, the switch 8 is also turned off to disconnect the solar battery storage battery 9. However, the storage battery 9 for solar cells is charged by a charger (not shown) at an appropriate time when the power system is normal.
【００２２】電力系統に停電が発生した場合には、保護
継電器１９の不足電圧継電器（ＵＶＲ）が電圧の低下を
検出して電磁接触器１２をＯＦＦにし、図示しない継電
器が電磁接触器１１をＯＦＦにすると共に電磁接触器１
５をＯＮにする。すると、太陽電池アレイ７で発電され
インバータ１０で変換された交流電力は、一般負荷６が
接続された低圧母線４には供給されず、電磁接触器１５
と配線用しゃ断器１６を介して自立運転負荷１７に供給
される。即ち、この場合、太陽電池アレイ７とインバー
タ１０は、電力系統とは連系せずに自立運転を行うこと
になる。また、この電力系統の停電時には、制御電源切
換用継電器２４の電磁部２４ｃが電圧の低下を検出して
切換接点２４ｄの接続を第２接点２４ｂ側に切り換える
ので、太陽電池アレイ７で発電されインバータ１０で変
換された２００Ｖの交流電力が変圧器２９により単相１
００Ｖに降圧されてこの制御電源切換用継電器２４を介
し表示装置２３に供給されると共に、制御電源用整流器
２５で直流電力に変換されて保護継電器１９と地絡過電
圧継電器２１と測定処理装置２２ｇに供給される。When a power failure occurs in the electric power system, the undervoltage relay (UVR) of the protection relay 19 detects a voltage drop and turns off the electromagnetic contactor 12, and a relay (not shown) turns off the electromagnetic contactor 11. And electromagnetic contactor 1
Turn on 5. Then, the AC power generated by the solar cell array 7 and converted by the inverter 10 is not supplied to the low-voltage bus 4 to which the general load 6 is connected, and the electromagnetic contactor 15 is connected.
It is supplied to the self-sustained operation load 17 via the wiring breaker 16. That is, in this case, the solar cell array 7 and the inverter 10 perform the independent operation without being connected to the power system. Further, at the time of power failure of this power system, the electromagnetic section 24c of the control power source switching relay 24 detects the voltage drop and switches the connection of the switching contact 24d to the second contact 24b side, so that the solar cell array 7 generates electric power and the inverter is generated. 200V AC power converted in 10 is converted into single phase 1 by the transformer 29.
The voltage is stepped down to 00V and supplied to the display device 23 via the control power source switching relay 24, and converted into DC power by the control power source rectifier 25 to the protection relay 19, the ground fault overvoltage relay 21, and the measurement processing device 22g. Supplied.
【００２３】さらに、この電力系統の停電時には、操作
によって配線用しゃ断器１３がＯＦＦにされると共に開
閉器８がＯＮにされる。すると、太陽光の受光量が不足
して太陽電池アレイ７が十分な電力を発電できない場合
にも、太陽電池用蓄電池９に蓄積された電力をインバー
タ１０を介して自立運転負荷１７や測定処理装置２２ｇ
等に供給することができる。また、太陽電池アレイ７が
十分な電力を発電する場合には、この電力の一部により
太陽電池用蓄電池９が充電されるので、太陽光の受光量
に変動がある場合にも安定した電力を供給することがで
きる。この太陽電池用蓄電池９は、太陽電池アレイ７が
長時間ほとんど発電を行わない夜間等に停電が発生した
場合にも、自立運転負荷１７等に確実に電力を供給でき
るように十分に大きな容量のものを用いる。また、電力
系統に停電が発生してから操作により開閉器８がＯＮさ
れるまでの間に太陽電池アレイ７の発電電力が不足する
場合が生じ得る。しかし、このような場合にも、制御電
源用蓄電池２６に蓄積された電力が測定処理装置２２ｇ
等に供給されるので、これらの制御電源が一時的にしゃ
断されるのを防ぐことができる。もっとも、停電が発生
すると比較的短時間に開閉器８がＯＮされるので、この
制御電源用蓄電池２６は小容量のもので足りる。Further, at the time of power failure of the power system, the wiring breaker 13 is turned off and the switch 8 is turned on by an operation. Then, even when the amount of received sunlight is insufficient and the solar cell array 7 cannot generate sufficient electric power, the electric power stored in the solar battery storage battery 9 is passed through the inverter 10 to the self-sustained operation load 17 and the measurement processing device. 22 g
Etc. Further, when the solar cell array 7 generates sufficient electric power, the solar battery storage battery 9 is charged with a part of this electric power, so that stable electric power is generated even when the amount of received sunlight changes. Can be supplied. The solar battery storage battery 9 has a sufficiently large capacity so that the solar battery array 7 can reliably supply power to the self-sustained operation load 17 and the like even when a power failure occurs at night or the like when the solar battery array 7 hardly generates power for a long time. Use one. Further, there may be a case where the power generated by the solar cell array 7 becomes insufficient between the time when the power failure occurs in the power system and the time when the switch 8 is turned on by the operation. However, even in such a case, the power stored in the storage battery 26 for the control power supply is measured by the measurement processing device 22g.
The control power supplies can be prevented from being temporarily cut off. However, since the switch 8 is turned on in a relatively short time when a power failure occurs, the control power storage battery 26 of a small capacity is sufficient.
【００２４】以上説明したように、本実施例によれば、
電力系統の正常時には、測定処理装置２２ｇ及び表示装
置２３（監視装置）と保護継電器１９及び地絡過電圧継
電器２１（保護装置）の制御電源は、従来と同様にこの
電力系統と太陽電池アレイ７及びインバータ１０（発電
装置）との連系により供給される。しかし、電力系統の
停電時には、この制御電源が太陽電池アレイ７と太陽電
池用蓄電池９とインバータ１０（発電装置）の自立運転
により供給される。従って、本実施例の分散形電源装置
では、制御電源用のＵＰＳを別に設けて大容量の蓄電池
によるバックアップを行う必要がなくなる。しかも、制
御電源の切り換えの際のバックアップを行う制御電源用
蓄電池２６の電池容量も小容量で足りるようになる。As described above, according to the present embodiment,
When the power system is normal, the control power supplies of the measurement processing device 22g, the display device 23 (monitoring device), the protection relay 19 and the ground fault overvoltage relay 21 (protection device) are the same as those of the conventional power system, the solar cell array 7, and It is supplied by interconnection with the inverter 10 (power generation device). However, at the time of power failure of the power system, this control power is supplied by the solar cell array 7, the solar battery storage battery 9, and the inverter 10 (power generation device) in a self-sustaining operation. Therefore, in the distributed power supply device of this embodiment, it is not necessary to separately provide a UPS for the control power supply and perform backup with a large-capacity storage battery. In addition, the battery capacity of the control power source storage battery 26, which backs up when the control power source is switched, can be small.
【００２５】なお、上記実施例では、本発明の制御電源
切換回路として制御電源切換用継電器２４を用いた例を
示したが、インバータ１０の出力を変圧器を介して直接
表示装置２３と制御電源用整流器２５に供給するように
して、この制御電源切換用継電器２４を省略した構成と
することもできる。この場合、電力系統との連系を切り
離すための電磁接触器１１，１２や配線用しゃ断器１３
が本発明の制御電源切換回路を兼用することになる。Although the control power source switching relay 24 is used as the control power source switching circuit of the present invention in the above embodiment, the output of the inverter 10 is directly fed to the display device 23 and the control power source via the transformer. The control power supply switching relay 24 may be omitted by supplying the power to the rectifier 25 for power supply. In this case, the electromagnetic contactors 11 and 12 and the wiring breaker 13 for disconnecting the interconnection with the power system
Also serves as the control power supply switching circuit of the present invention.
【００２６】また、上記実施例では、電力系統の停電時
について説明したが、他の故障や異常により電力系統を
しゃ断する場合にも同様にして制御電源を切り換えるこ
とができる。さらに、上記実施例では、太陽電池アレイ
７を利用した分散形電源装置について説明したが、他の
発電装置を用いた分散形電源装置についても同様に実施
することができる。Further, in the above embodiment, the power supply system is interrupted, but the control power supply can be switched in the same manner when the power system is cut off due to another failure or abnormality. Further, although the distributed power supply device using the solar cell array 7 has been described in the above embodiment, the distributed power supply device using another power generation device can be similarly implemented.
【００２７】[0027]
【発明の効果】以上の説明から明らかなように、本発明
の分散形電源装置によれば、管理装置の制御電源用にＵ
ＰＳを設ける必要がなくなると共に、この制御電源の切
り換えの際に一時的にバックアップを行う蓄電池を小容
量のものとすることができるので、システムのコストダ
ウンに寄与することができるようになる。As is apparent from the above description, according to the distributed power supply device of the present invention, the U power supply is used as the control power supply for the management device.
It is not necessary to provide the PS, and the storage battery that temporarily backs up when the control power supply is switched can be made to have a small capacity, which can contribute to cost reduction of the system.
【図１】本発明の一実施例を示すものであって、分散形
電源装置の構成を示す回路ブロック図である。FIG. 1 shows an embodiment of the present invention and is a circuit block diagram showing a configuration of a distributed power supply device.
１ 電力系統の受電点 ６ 一般負荷 ７ 太陽電池 ９ 太陽電池用蓄電池 １０ インバータ １７ 自立運転負荷 １９ 保護継電器 ２１ 地絡過電圧継電器 ２２ 測定装置 ２２ｇ 測定処理装置 ２３ 表示装置 ２４ 制御電源切換用継電器 1 Power receiving point of power system 6 General load 7 Solar battery 9 Storage battery for solar battery 10 Inverter 17 Self-sustaining load 19 Protective relay 21 Ground fault overvoltage relay 22 Measuring device 22g Measuring processor 23 Display device 24 Control power switching relay
Claims (3)
ると共に、これら電源系統及び／又は発電装置の保護及
び／又は監視を行う管理装置が設けられ、電力系統の正
常時には発電装置を連系運転させてこれら電力系統と発
電装置から一般負荷に電力を供給し、電力系統の異常時
には発電装置を自立運転させて自立運転負荷に電力を供
給する分散形電源装置において、 電力系統の正常時には電力系統と発電装置から管理装置
に電力を供給し、電力系統の異常時には発電装置から管
理装置に電力を供給する制御電源切換回路が設けられた
ことを特徴とする分散形電源装置。1. A power generator is provided adjacent to a power system, and a management device for protecting and / or monitoring the power system and / or the power generator is provided. The power generator is interconnected when the power system is normal. In a distributed power supply device that is operated to supply power to a general load from these power systems and generators, and when the power system is abnormal, the generator operates autonomously to supply power to the self-sustaining load. A distributed power supply device comprising a control power supply switching circuit that supplies power from a grid and a power generator to a management device, and supplies power from the power generator to the management device when the power system is abnormal.
線路をしゃ断する保護装置を含むことを特徴とする請求
項１に記載の分散形電源装置。2. The distributed power supply device according to claim 1, wherein the management device includes a protection device that detects an abnormality in the power system and cuts off the line.
定する測定装置とこの測定装置で測定したデータを表示
する表示装置とからなる監視装置を含むことを特徴とす
る請求項１又は請求項２に記載の分散形電源装置。3. The control device according to claim 1, further comprising a monitoring device including a measuring device for measuring a power generation state of the power generating device and a display device for displaying data measured by the measuring device. 2. The distributed power supply device according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7183460A JPH0919066A (en) | 1995-06-27 | 1995-06-27 | Dispersion type power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7183460A JPH0919066A (en) | 1995-06-27 | 1995-06-27 | Dispersion type power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0919066A true JPH0919066A (en) | 1997-01-17 |
Family
ID=16136173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7183460A Pending JPH0919066A (en) | 1995-06-27 | 1995-06-27 | Dispersion type power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0919066A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11113190A (en) * | 1997-10-01 | 1999-04-23 | Omron Corp | Distributed power supply system |
| JP2000184601A (en) * | 1998-12-16 | 2000-06-30 | Kansai Electric Power Co Inc:The | System interconnection power unit |
| JP2009124798A (en) * | 2007-11-12 | 2009-06-04 | Toshiba Corp | Distributed power supply system and power conversion device |
| CN102820698A (en) * | 2011-06-07 | 2012-12-12 | 淮阴工学院 | Automatic double-circuit power supply controlling system for ventilating fan of air-conditioned bus |
| CN103151799A (en) * | 2013-03-30 | 2013-06-12 | 大连宏海新能源发展有限公司 | Microgrid power supply system and control method thereof |
| CN103368426A (en) * | 2013-08-02 | 2013-10-23 | 北京中电安博机电技术有限公司 | Photovoltaic inverter with open-circuit voltage protection function |
| JP2013247841A (en) * | 2012-05-29 | 2013-12-09 | Mitsubishi Electric Corp | Power source switching apparatus, dwelling, and power source switching method |
| CN104300665A (en) * | 2014-09-10 | 2015-01-21 | 广州优联电气科技有限公司 | Intelligent power source system applied to track traffic communication backup |
| CN105100747A (en) * | 2015-08-31 | 2015-11-25 | 上海福泽工业自动化设备有限公司 | Explosion-proof solar wireless monitoring system |
| CN106340946A (en) * | 2016-10-13 | 2017-01-18 | 上海市城市排水有限公司机修安装分公司 | Mobile flood control solar emergency inversion power supply vehicle |
| CN111146857A (en) * | 2019-12-04 | 2020-05-12 | 万晖五金（深圳）有限公司 | Control system and control method |
-
1995
- 1995-06-27 JP JP7183460A patent/JPH0919066A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11113190A (en) * | 1997-10-01 | 1999-04-23 | Omron Corp | Distributed power supply system |
| JP2000184601A (en) * | 1998-12-16 | 2000-06-30 | Kansai Electric Power Co Inc:The | System interconnection power unit |
| JP2009124798A (en) * | 2007-11-12 | 2009-06-04 | Toshiba Corp | Distributed power supply system and power conversion device |
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