JP3255797B2 - Operation control method of distributed power supply - Google Patents
Operation control method of distributed power supplyInfo
- Publication number
- JP3255797B2 JP3255797B2 JP13476094A JP13476094A JP3255797B2 JP 3255797 B2 JP3255797 B2 JP 3255797B2 JP 13476094 A JP13476094 A JP 13476094A JP 13476094 A JP13476094 A JP 13476094A JP 3255797 B2 JP3255797 B2 JP 3255797B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- inverter
- voltage
- control method
- phase
- 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.)
- Expired - Fee Related
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Inverter Devices (AREA)
- Photovoltaic Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は分散電源の運転制御方法
に関し、詳しくは、バッテリ付き太陽電池ユニットを持
つ太陽光発電システム等において、系統電源の停電など
の異常発生時に自立運転していたインバータを、復電な
どの正常状態への復帰時、系統電源と連系させて通常運
転する分散電源の運転制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the operation of a distributed power supply, and more particularly, to an inverter which operates independently when an abnormality such as a power failure of a system power supply occurs in a solar power generation system having a solar cell unit with a battery. The present invention relates to a method of controlling the operation of a distributed power supply that is normally operated by being linked to a system power supply when the power supply returns to a normal state such as a power recovery.
【０００２】[0002]
【従来の技術】近年、クリーンな新エネルギー源として
太陽光発電システムが利用されつつあり、その利用法と
しても様々な形態がある。2. Description of the Related Art In recent years, a photovoltaic power generation system has been used as a clean new energy source, and there are various forms of usage.
【０００３】例えば、バッテリ付き太陽光発電システム
は、図３に示すように直流電源１であるバッテリ付き太
陽電池ユニットとその直流電源１から発生した直流電力
を交流変換するインバータ２とからなる分散電源３を、
系統連系スイッチ４を介して系統電源５に連系させ、そ
の分散電源３又は系統電源５から選択的に負荷６に電力
を供給するようにしたものである。For example, a photovoltaic power generation system with a battery, as shown in FIG. 3, is a distributed power source including a solar cell unit with a battery as a DC power source 1 and an inverter 2 for converting the DC power generated from the DC power source 1 into an alternating current. 3
The power supply is connected to a system power supply 5 via a system connection switch 4, and power is selectively supplied to a load 6 from the distributed power supply 3 or the system power supply 5.
【０００４】前記分散電源３のインバータ２には、一般
にその出力電流が目標電流値となるように出力電流をフ
ィードバック制御する電流制御方式によるものと、出力
電圧が目標電圧値となるようにその出力電圧をフィード
バック制御する電圧制御方式によるものとがある。従
来、電流制御方式か電圧制御方式のいずれか一方の方式
によるインバータ２が使用され、特に、系統電源５によ
る系統電圧が安定化しているため、安定した電流波形を
得るために電流制御方式によるインバータ２が賞用され
ている。[0004] The inverter 2 of the distributed power source 3 generally employs a current control system for feedback-controlling the output current so that its output current becomes a target current value, and an inverter 2 whose output voltage becomes a target voltage value. There is a voltage control method in which a voltage is feedback-controlled. Conventionally, an inverter 2 using either a current control method or a voltage control method has been used. In particular, since the system voltage from the system power supply 5 has been stabilized, an inverter based on the current control method has been used to obtain a stable current waveform. 2 have been awarded.
【０００５】[0005]
【発明が解決しようとする課題】ところで、何等かの原
因により系統電源５に、例えば停電、電圧低下、電圧上
昇、周波数異常、第３次高調波検出などの異常が発生す
ることがある。特に、系統電源５が停電すると、直流電
源１を設置した自所内の負荷６までも電力供給不能とな
る。そのため、系統電源５に停電が発生した場合、その
時点で系統連系スイッチ４を遮断した上で、インバータ
２をバッテリ又は太陽電池ユニットの直流電源１により
自立運転して負荷６に電力を供給する必要がある。そし
て、前記系統電源５の停電が解消して復電すると、前記
系統連系スイッチ４を閉成してインバータ２を系統電源
５と連系させ、系統電源５の停電時に自立運転していた
インバータ２を通常運転する必要がある。By the way, abnormalities such as a power failure, a voltage drop, a voltage increase, a frequency abnormality, and a third harmonic detection may occur in the system power supply 5 for some reason. In particular, when the system power supply 5 fails, power cannot be supplied to the load 6 in the own place where the DC power supply 1 is installed. Therefore, when a power failure occurs in the system power supply 5, the system interconnection switch 4 is shut off at that time, and the inverter 2 is independently operated by the DC power supply 1 of the battery or the solar cell unit to supply power to the load 6. There is a need. Then, when the power failure of the system power supply 5 is resolved and the power is restored, the system interconnection switch 4 is closed to connect the inverter 2 to the system power supply 5, and the inverter that has been operating independently when the system power supply 5 has failed is operated. 2 needs to be operated normally.
【０００６】しかしながら、従来では、系統電源５の異
常時での自立運転と正常時での通常運転の両方で、イン
バータ２を電流制御方式か電圧制御方式のいずれか一方
の方式により制御していたため、以下のような問題があ
った。However, conventionally, the inverter 2 is controlled by either the current control method or the voltage control method in both the self-sustained operation when the system power supply 5 is abnormal and the normal operation when it is normal. However, there were the following problems.
【０００７】即ち、電流制御方式によるインバータ２で
は、系統電源５の正常時に通常運転している場合には、
安定した電流波形を得ることができるので問題はない
が、前記系統電源５に停電が発生して自立運転した場
合、系統電源５による系統電圧がなくなることにより、
インバータ２における制御電流指令値が不安定となり制
御不能に陥って停止してしまうという問題があった。逆
に、電圧制御方式によるインバータ２では、系統電源５
に停電が発生して自立運転している場合には、安定した
出力電圧を得ることができるので問題はないが、系統電
源５の正常時に通常運転した場合、高調波による歪みで
安定した電流波形を得ることが困難となりインバータ２
の最適な制御を実現することがむずかしいという問題が
あった。That is, in the inverter 2 of the current control system, when the system power supply 5 is operating normally when the system power supply 5 is normal,
There is no problem because a stable current waveform can be obtained. However, when a power failure occurs in the system power supply 5 and the self-sustaining operation is performed, the system voltage by the system power supply 5 disappears.
There is a problem that the control current command value in the inverter 2 becomes unstable, the control becomes impossible, and the inverter 2 stops. Conversely, in the voltage-controlled inverter 2, the system power supply 5
There is no problem if a self-sustained operation occurs due to a power failure, but there is no problem because a stable output voltage can be obtained. It becomes difficult to obtain inverter 2
There is a problem that it is difficult to realize the optimal control of the above.
【０００８】そこで、本発明は上記問題点に鑑みて提案
されたもので、その目的とするところは、系統電源の異
常状態が解消してその異常状態から正常状態へ復帰する
時、その異常状態での自立運転と正常状態での通常運転
との両方で、インバータの最適な制御を実現し得る分散
電源の運転制御方法を提供することにある。Accordingly, the present invention has been proposed in view of the above-mentioned problems, and an object of the present invention is to solve an abnormal state of a system power supply when returning from the abnormal state to a normal state. It is an object of the present invention to provide an operation control method of a distributed power supply that can realize the optimal control of the inverter in both the self-sustaining operation in the normal operation and the normal operation in the normal state.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
の技術的手段として、本発明は、直流電源から発生した
直流電力を交流変換するインバータを有し、そのインバ
ータを系統連系スイッチを介して系統電源に連系させた
分散電源の運転制御方法であって、前記系統電源が異常
状態から正常状態に復帰した時、その系統電源の復帰を
検出し、系統電源の異常時に電圧制御方式による自立運
転中にあるインバータの出力電圧を、系統電圧の検出に
基づいてインバータ出力電圧の検出と共に、位相・周波
数同期回路により系統電圧の位相・周波数と同期させる
と共に振幅調整回路により系統電圧の振幅と一致させた
上で、前記位相・周波数同期回路および振幅調整回路の
両出力に基づいて系統連系スイッチを閉成して前記イン
バータを系統電源と連系させ、前記系統連系スイッチの
閉成直後にインバータを停止させ、その後、前記インバ
ータをその電圧制御方式から電流制御方式へ切り替えた
上で通常運転を開始するようにしたことを特徴とする。As a technical means for achieving the above object, the present invention has an inverter for converting DC power generated from a DC power supply into an AC power, and the inverter is connected via a system interconnection switch. An operation control method of a distributed power supply linked to a system power supply, wherein when the system power supply returns from an abnormal state to a normal state, the return of the system power supply is detected, and when the system power supply is abnormal, a voltage control method is used. The output voltage of the inverter during autonomous operation is used to detect the system voltage.
Based on the detection of the inverter output voltage, the phase / frequency synchronization circuit synchronizes with the phase / frequency of the system voltage, and the amplitude adjustment circuit matches the amplitude of the system voltage with the phase / frequency synchronization circuit and the amplitude adjustment circuit. Closing the system interconnection switch based on both outputs to interconnect the inverter with the system power supply, stopping the inverter immediately after the system interconnection switch is closed, and then switching the inverter from its voltage control mode. It is characterized in that the normal operation is started after switching to the current control method.
【００１０】[0010]
【作用】本発明方法では、系統電源が異常状態であれ
ば、自立運転中にあるインバータを電圧制御方式で制御
することによりインバータから安定した出力電圧を得
る。一方、前記系統電源が異常状態から正常状態へ復帰
すると、位相・周波数同期回路と振幅調整回路の両者に
よる前記インバータの出力電圧と系統電圧との位相・周
波数及び振幅合わせを条件として系統連系スイッチを閉
成して系統電源と連系させれば、その後にインバータを
停止させても負荷が停電することはない。その上で、前
記インバータを電圧制御方式から電流制御方式へ切り替
えて通常運転を開始するようにすれば、その電流制御方
式により安定した電流波形を持つインバータ出力を得
る。According to the method of the present invention, when the system power supply is in an abnormal state, a stable output voltage is obtained from the inverter by controlling the inverter in the self-sustaining operation by the voltage control method. On the other hand, when the system power supply returns from the abnormal state to the normal state, both the phase / frequency synchronization circuit and the amplitude adjustment circuit
Wherein if caused to the inverter output voltage and phase and frequency and the system power supply and the interconnection by closing the system interconnection switch the amplitude adjustment as a condition of the system voltage, power failure load even then to stop the inverter with Never. Then, if the inverter is switched from the voltage control method to the current control method to start normal operation, an inverter output having a stable current waveform can be obtained by the current control method.
【００１１】[0011]
【実施例】以下、前述したバッテリ付き太陽光発電シス
テムに本発明を適用した実施例について図１及び図２に
示して説明する。尚、図１は本発明方法の実施装置例を
示す制御回路ブロック図、図２は本発明方法によるイン
バータの自立運転から通常運転へ復帰する際のフローチ
ャートを示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to the above-described photovoltaic power generation system with a battery will be described with reference to FIGS. FIG. 1 is a block diagram of a control circuit showing an example of an apparatus for implementing the method of the present invention, and FIG. 2 is a flowchart when the inverter of the present invention returns from an independent operation to a normal operation.
【００１２】図１に示す太陽光発電システムは、従来と
同様、直流電源１１であるバッテリ付き太陽電池ユニッ
トとその直流電源１１から発生した直流電力を交流変換
するインバータ１２とからなる分散電源１３を、系統連
系スイッチ１４を介して系統電源１５に連系させ、その
分散電源１３又は系統電源１５から選択的に負荷１６に
電力を供給するようにしたものであり、本発明の特徴は
後述のインバータ１２の制御にある。As shown in FIG. 1, the photovoltaic power generation system shown in FIG. 1 includes a distributed power supply 13 including a solar cell unit with a battery as a DC power supply 11 and an inverter 12 for converting the DC power generated from the DC power supply 11 into an alternating current. The power supply is connected to a system power supply 15 via a system connection switch 14, and power is selectively supplied to the load 16 from the distributed power supply 13 or the system power supply 15. The feature of the present invention will be described later. It is under the control of the inverter 12.
【００１３】即ち、系統電源１５に停電などの異常が発
生していると、その異常状態では、前記系統連系スイッ
チ１４を遮断した状態でインバータ１２をバッテリ又は
太陽電池ユニットの直流電源１１により電圧制御方式で
制御しながら自立運転する。この電圧制御方式により自
立運転することによって、インバータ１２の安定した出
力電圧でもって負荷１６に電力を供給できる。一方、前
記系統電源１５が復電して異常状態から正常状態へ復帰
すると、以下の方法によりインバータ１２を電圧制御方
式から電流制御方式へ切り替えて自立運転から通常運転
へ移行する。系統電源１５の正常状態でインバータ１２
を電流制御方式により通常運転することによって、安定
した電流波形を持つインバータ出力でもって負荷１６に
電力を供給できる。That is, when an abnormality such as a power failure occurs in the system power supply 15, in the abnormal state, the inverter 12 is operated by the DC power supply 11 of the battery or the solar cell unit while the system interconnection switch 14 is shut off. Operates autonomously while controlling by the control method. By performing the self-sustaining operation according to this voltage control method, power can be supplied to the load 16 with a stable output voltage of the inverter 12. On the other hand, when the power of the system power supply 15 is restored to return from the abnormal state to the normal state, the inverter 12 is switched from the voltage control method to the current control method by the following method to shift from the self-sustained operation to the normal operation. When the system power supply 15 is in a normal state, the inverter 12
Can be supplied to the load 16 with an inverter output having a stable current waveform.
【００１４】本発明では、上述したインバータ１２の制
御を電圧制御方式から電流制御方式へ切り替えるために
系統電圧監視回路１７を付加する。この系統電圧監視回
路１７は、系統電圧を検出する変圧器１８及びインバー
タ出力電圧を検出する変圧器１９に接続し、インバータ
出力電圧の位相・周波数を系統電圧と同期させると共に
振幅を系統電圧と一致させるための位相・周波数同期回
路２０及び振幅調整回路２１で構成され、位相・周波数
同期回路２０と振幅調整回路２１の出力はＡＮＤ回路２
２を介して系統連系スイッチ１４に送出されると共にＮ
ＯＴ回路２３，２４を介してインバータ１２に送出され
る。In the present invention, a system voltage monitoring circuit 17 is added to switch the control of the inverter 12 from the voltage control method to the current control method. The system voltage monitoring circuit 17 is connected to a transformer 18 for detecting a system voltage and a transformer 19 for detecting an inverter output voltage, and synchronizes the phase and frequency of the inverter output voltage with the system voltage and adjusts the amplitude. A phase / frequency synchronization circuit 20 and an amplitude adjustment circuit 21 for matching with the system voltage are provided. The outputs of the phase / frequency synchronization circuit 20 and the amplitude adjustment circuit 21 are output from an AND circuit 2.
2 to the system interconnection switch 14 and N
The signal is sent to the inverter 12 via the OT circuits 23 and 24.
【００１５】本発明方法では、図２に示すように系統電
圧及びインバータ１２の出力電圧を常に監視しながら、
系統電源１５に停電などの異常が発生した後、その異常
状態が解除されて復電などの正常状態に復帰すると、異
常状態が解除されて正常状態に復帰したことを検出す
る。ここで、後述するインバータ１２と系統電源１５と
の連系時に両者の電圧が同期していないとインバータ１
２に過電流が流れて停止してしまうため、上述した正常
状態への復帰を検出したことに基づいてインバータ１２
の出力電圧の位相・周波数を系統電圧と同期させると共
に振幅を系統電圧と一致させる。In the method of the present invention, while constantly monitoring the system voltage and the output voltage of the inverter 12 as shown in FIG.
When an abnormal state such as a power failure occurs in the system power supply 15 and the abnormal state is released to return to a normal state such as a power recovery, it is detected that the abnormal state has been released and the state has returned to a normal state. Here, when the voltages of the inverter 12 and the system power supply 15 described later are not synchronized at the time of interconnection, the inverter 1
2 is stopped due to an overcurrent flowing through the inverter 12 based on the detection of the return to the normal state.
When the output voltage phase and frequency are synchronized with the system voltage,
To make the amplitude coincide with the system voltage.
【００１６】そして、前記インバータ１２の出力電圧の
位相・周波数を系統電圧と完全に同期すると共に振幅が
系統電圧と完全に一致した時点で、系統連系スイッチ１
４を閉成して分散電源１３のインバータ１２を系統電源
１５と連系させる。この時、系統電源１５との連系によ
りインバータ１２の出力電圧に波形歪みが発生すること
を未然に防止するため、系統連系スイッチ１４の閉成直
後にインバータ１２を停止させる。その上で、前記イン
バータ１２を電圧制御方式から電流制御方式へ切り替え
再起動して通常運転を開始する。When the phase and frequency of the output voltage of the inverter 12 are completely synchronized with the system voltage and the amplitude completely matches the system voltage, the system interconnection switch 1
4 is closed to connect the inverter 12 of the distributed power supply 13 to the system power supply 15. At this time, the inverter 12 is stopped immediately after the system interconnection switch 14 is closed in order to prevent a waveform distortion from occurring in the output voltage of the inverter 12 due to interconnection with the system power supply 15. Then, the inverter 12 is switched from the voltage control method to the current control method and restarted to start the normal operation.
【００１７】上述したインバータ１２が自立運転から通
常運転へ移行する際の切り替えを、図１の制御ブロック
図を参照しながら説明する。A description will now be given, with reference to the control block diagram of FIG. 1, of the switching of the inverter 12 when the inverter 12 shifts from self-sustained operation to normal operation.
【００１８】まず、系統電圧及びインバータ１２の出力
電圧をそれぞれ変圧器１８，１９により常に監視しなが
ら、系統電源１５が復電などの正常状態へ復帰すると、
その正常状態への復帰により系統電圧が発生するため、
その系統電圧を変圧器１８により検出する。この系統電
圧の検出に基づいて、変圧器１９によるインバータ１２
の出力電圧の検出と共に、系統電圧監視回路１７の位相
・周波数同期回路２０及び振幅調整回路２１により前記
インバータ１２の出力電圧が系統電圧と同期しているか
否かを判別する。First, while the system voltage and the output voltage of the inverter 12 are constantly monitored by the transformers 18 and 19, respectively, when the system power supply 15 returns to a normal state such as power restoration,
Since the system voltage is generated by returning to the normal state,
The system voltage is detected by the transformer 18. Based on the detection of the system voltage, the inverter 12
And the phase / frequency synchronization circuit 20 and amplitude adjustment circuit 21 of the system voltage monitoring circuit 17 determine whether the output voltage of the inverter 12 is synchronized with the system voltage.
【００１９】ここで、インバータ１２の出力電圧の位相
・周波数が系統電圧と同期せず、又は振幅が系統電圧と
一致してなければ、位相・周波数同期回路２０又は振幅
調整回路２１の出力が“Ｌ”となり、これによりＮＯＴ
回路２３又は２４の出力が“Ｈ”となってインバータ１
２ではその出力電圧の位相・周波数又は振幅を調整す
る。この時、前記位相・周波数同期回路２０又は振幅調
整回路２１の出力が“Ｌ”であるため、ＡＮＤ回路２２
の出力が“Ｌ”となって系統連系スイッチ１４は遮断し
たままである。Here, the phase and frequency of the output voltage of the inverter 12 are not synchronized with the system voltage, or the amplitude is different from the system voltage.
If they do not match, the output of the phase / frequency synchronizing circuit 20 or the amplitude adjusting circuit 21 becomes "L".
The output of the circuit 23 or 24 becomes “H” and the inverter 1
In step 2, the phase, frequency or amplitude of the output voltage is adjusted. At this time, since the output of the phase / frequency synchronization circuit 20 or the amplitude adjustment circuit 21 is “L”, the AND circuit 22
Becomes "L", and the system interconnection switch 14 remains off.
【００２０】そして、前記インバータ１２の出力電圧の
位相・周波数が系統電圧と完全に同期すると共に及び振
幅が系統電圧と完全に一致した時点で、位相・周波数同
期回路２０及び振幅調整回路２１の出力が“Ｈ”となれ
ば、これによりＡＮＤ回路２２の出力が“Ｈ”となって
系統連系スイッチ１４を閉成し分散電源１３のインバー
タ１２を系統電源１５と連系させる。この系統連系スイ
ッチ１４の閉成直後にインバータ１２を停止させ、前記
インバータ１２を電圧制御方式から電流制御方式へ切り
替えた上でそのインバータ１２の再起動により通常運転
を開始する。このようにすれば、負荷１６に対して無停
電で、異常発生時での自立運転から正常状態での通常運
転へインバータ１２を支障なく移行させることができ
る。When the phase and frequency of the output voltage of the inverter 12 are completely synchronized with the system voltage and when the amplitude completely matches the system voltage, the output of the phase / frequency synchronization circuit 20 and the amplitude adjustment circuit 21 Becomes "H", the output of the AND circuit 22 becomes "H", the system interconnection switch 14 is closed, and the inverter 12 of the distributed power source 13 is interconnected with the system power source 15. Immediately after closing the system interconnection switch 14, the inverter 12 is stopped, the inverter 12 is switched from the voltage control method to the current control method, and the inverter 12 is restarted to start normal operation. In this way, the inverter 12 can be shifted from the self-sustained operation at the time of occurrence of an abnormality to the normal operation in the normal state without any interruption without interruption to the load 16.
【００２１】尚、上記実施例では、バッテリ付き太陽光
発電システムについて説明したが、本発明はこれに限定
されることなく、バッテリ又は太陽電池ユニット以外の
他の直流電源を有するシステムにも適用可能である。In the above embodiment, the photovoltaic power generation system with a battery has been described. However, the present invention is not limited to this, and can be applied to a system having a DC power source other than a battery or a solar cell unit. It is.
【００２２】[0022]
【発明の効果】本発明方法によれば、系統電圧の検出に
基づいてインバータ出力電圧の検出と共に、位相・周波
数同期回路と振幅調整回路の両者により、インバータの
出力電圧の位相・周波数が系統電圧と完全に同期すると
共に振幅が系統電圧と完全に一致した上でインバータを
系統電源と連系させ、その後、前記インバータを電圧制
御方式から電流制御方式へ切り替えて通常運転を開始す
るようにしたから、系統電源が停電などの異常状態から
復電などの正常状態へ復帰した時、その異常状態での自
立運転から正常状態での通常運転へのインバータの切り
替えを、負荷に対して無停電で行なうことが容易に実現
できてその実用的価値は大である。According to the method of the present invention, the system voltage can be detected.
Based on the detection of the inverter output voltage, both the phase and frequency synchronization circuit and the amplitude adjustment circuit make sure that the phase and frequency of the output voltage of the inverter are completely synchronized with the system voltage and that the amplitude completely matches the system voltage. Since the inverter was connected to the system power supply, and then the inverter was switched from the voltage control method to the current control method to start normal operation, the system power supply changed from an abnormal state such as a power failure to a normal state such as a power recovery. When the inverter returns, the inverter can be easily switched from the self-sustaining operation in the abnormal state to the normal operation in the normal state without interruption to the load, and its practical value is great.
【図１】本発明方法の実施装置例を示す制御回路ブロッ
ク図FIG. 1 is a block diagram of a control circuit showing an example of an apparatus for implementing a method of the present invention.
【図２】本発明方法におけるインバータの自立運転から
通常運転へ移行する際のフローチャートFIG. 2 is a flow chart when the inverter shifts from an independent operation to a normal operation in the method of the present invention.
【図３】バッテリ付き太陽電池ユニットを系統電源と連
系させた太陽光発電システムを示すブロック図FIG. 3 is a block diagram showing a solar power generation system in which a solar cell unit with a battery is connected to a system power supply.
１１ 直流電源 １２ インバータ １３ 分散電源 １４ 系統連系スイッチ １５ 系統電源 １６ 負荷 11 DC power supply 12 Inverter 13 Distributed power supply 14 System interconnection switch 15 System power supply 16 Load
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高田 啓一郎 京都府京都市右京区梅津高畝町47番地 日新電機株式会社内 (72)発明者 夏田 育千 京都府京都市右京区梅津高畝町47番地 日新電機株式会社内 (72)発明者 蓑輪 義文 京都府京都市右京区梅津高畝町47番地 日新電機株式会社内 (72)発明者 志方 俊彦 京都府京都市右京区梅津高畝町47番地 日新電機株式会社内 (56)参考文献 特開 昭60−216727（ＪＰ，Ａ) 特開 昭61−154431（ＪＰ，Ａ) 特開 昭61−173636（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02M 7/48 H02J 3/38 H01L 31/04 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichiro Takada 47-47 Umezu Takaune-cho, Ukyo-ku, Kyoto, Kyoto Prefecture Inside Nissin Electric Co., Ltd. (72) Inventor Ikusen 47-47 Umezu Takaune-cho, Ukyo-ku, Kyoto, Kyoto Inside Electric Co., Ltd. (72) Inventor Yoshifumi Minowa Inside Nissin Electric Co., Ltd. 47, Umezu Takaune-cho, Ukyo-ku, Kyoto City, Kyoto Prefecture (72) Inside Inventor Toshihiko 47, Umezu Takaune-cho, Ukyo-ku, Kyoto City, Kyoto Prefecture (56) reference Patent Sho 60-216727 (JP, a) JP Akira 61-154431 (JP, a) JP Akira 61-173636 (JP, a) (58 ) investigated the field (Int.Cl. 7 , DB name) H02M 7/48 H02J 3/38 H01L 31/04
Claims (1)
換するインバータを有し、そのインバータを系統連系ス
イッチを介して系統電源に連系させた分散電源の運転制
御方法であって、前記系統電源が異常状態から正常状態
に復帰した時、その系統電源の復帰を検出し、系統電源
の異常時に電圧制御方式による自立運転中にあるインバ
ータの出力電圧を、系統電圧の検出に基づいてインバー
タ出力電圧の検出と共に、位相・周波数同期回路により
系統電圧の位相・周波数と同期させると共に振幅調整回
路により系統電圧の振幅と一致させた上で、前記位相・
周波数同期回路および振幅調整回路の両出力に基づいて
系統連系スイッチを閉成して前記インバータを系統電源
と連系させ、前記系統連系スイッチの閉成直後にインバ
ータを停止させ、その後、前記インバータをその電圧制
御方式から電流制御方式へ切り替えた上で通常運転を開
始するようにしたことを特徴とする分散電源の運転制御
方法。An operation control method for a distributed power supply, comprising: an inverter for converting DC power generated from a DC power supply into AC power, wherein the inverter is connected to a system power supply via a system connection switch. When the power supply returns from the abnormal state to the normal state, the recovery of the system power supply is detected, and when the system power supply is abnormal, the output voltage of the inverter that is operating independently by the voltage control method is inverted based on the detection of the system voltage.
Along with the detection of the output voltage, the phase / frequency synchronization circuit synchronizes with the phase / frequency of the system voltage, and the amplitude adjustment circuit matches the amplitude of the system voltage.
Closing the system interconnection switch based on both outputs of the frequency synchronization circuit and the amplitude adjustment circuit to interconnect the inverter with the system power supply, stopping the inverter immediately after closing the system interconnection switch, A method for controlling operation of a distributed power supply, wherein the inverter is switched from a voltage control method to a current control method and normal operation is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13476094A JP3255797B2 (en) | 1994-06-17 | 1994-06-17 | Operation control method of distributed power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13476094A JP3255797B2 (en) | 1994-06-17 | 1994-06-17 | Operation control method of distributed power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH089648A JPH089648A (en) | 1996-01-12 |
| JP3255797B2 true JP3255797B2 (en) | 2002-02-12 |
Family
ID=15135925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13476094A Expired - Fee Related JP3255797B2 (en) | 1994-06-17 | 1994-06-17 | Operation control method of distributed power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3255797B2 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3547355B2 (en) * | 1999-12-28 | 2004-07-28 | 株式会社日立製作所 | Power conversion system |
| JP3940585B2 (en) * | 2001-11-09 | 2007-07-04 | 東芝三菱電機産業システム株式会社 | Grid interconnection device |
| JP2007159238A (en) * | 2005-12-02 | 2007-06-21 | Toshiba Mitsubishi-Electric Industrial System Corp | System linkage device |
| JP4597097B2 (en) * | 2006-07-19 | 2010-12-15 | 東芝三菱電機産業システム株式会社 | Grid interconnection device |
| JP5410037B2 (en) * | 2007-05-30 | 2014-02-05 | 三洋電機株式会社 | Grid interconnection device and grid interconnection system |
| EP2325970A3 (en) * | 2009-11-19 | 2015-01-21 | Samsung SDI Co., Ltd. | Energy management system and grid-connected energy storage system including the energy management system |
| JP5643154B2 (en) * | 2011-05-25 | 2014-12-17 | 株式会社三社電機製作所 | Power conditioner |
| JP2013063000A (en) * | 2011-09-15 | 2013-04-04 | Sumitomo Electric Ind Ltd | System interconnection protection system, system interconnection protection device, and power conditioner |
| JP5988079B2 (en) * | 2012-03-05 | 2016-09-07 | パナソニックＩｐマネジメント株式会社 | Control device, conversion device, control method, and power distribution system |
| JP5988078B2 (en) * | 2012-03-05 | 2016-09-07 | パナソニックＩｐマネジメント株式会社 | Control device and power distribution system |
| JP5896879B2 (en) * | 2012-10-30 | 2016-03-30 | 三菱電機株式会社 | Power supply device and synchronous input device |
| JP6167341B2 (en) * | 2012-11-01 | 2017-07-26 | 日東工業株式会社 | Grid interconnection system |
| JP6043223B2 (en) * | 2013-03-21 | 2016-12-14 | 株式会社デンソー | Cooperation system of photovoltaic power generation and storage battery |
| CN105490513B (en) * | 2016-01-26 | 2018-12-04 | 漳州科华技术有限责任公司 | A kind of inversion output overcurrent guard method |
| JP6631311B2 (en) * | 2016-02-25 | 2020-01-15 | 株式会社明電舎 | Power generation system |
| CN110829482B (en) * | 2018-08-07 | 2022-04-08 | 阳光电源股份有限公司 | Integrated medium-voltage photovoltaic grid-connected system and interlocking control device thereof |
-
1994
- 1994-06-17 JP JP13476094A patent/JP3255797B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH089648A (en) | 1996-01-12 |
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