JPH08205555A - Controller for power converter in cooperation with power system - Google Patents
Controller for power converter in cooperation with power systemInfo
- Publication number
- JPH08205555A JPH08205555A JP7009799A JP979995A JPH08205555A JP H08205555 A JPH08205555 A JP H08205555A JP 7009799 A JP7009799 A JP 7009799A JP 979995 A JP979995 A JP 979995A JP H08205555 A JPH08205555 A JP H08205555A
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- Prior art keywords
- current
- power converter
- circuit
- value
- command value
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- Stand-By Power Supply Arrangements (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、交流側が遮断器を介し
て電力系統に連携される電力変換器の制御装置に係り、
特に交流遮断器や自己消弧能力を持たない半導体スイッ
チ素子等を用いた場合でも、電力系統と電力変換器との
間を高速に切り放せるようにした電力系統と連携する電
力変換器の制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a power converter whose AC side is linked to a power system through a circuit breaker,
Control of the power converter that cooperates with the power system so that the power system and the power converter can be separated at high speed even when an AC circuit breaker or a semiconductor switch element that does not have self-extinguishing capability is used. It relates to the device.
【０００２】[0002]
【従来の技術】図３は、この種の交流側が遮断器を介し
て電力系統に連携される電力変換器の制御装置の一例を
示す回路図である。図３において、電力系統１には、電
力変換器２の交流側が、遮断器３を介して連携されてい
る。なお、４は電力変換器２の直流側に接続された直流
電源である。2. Description of the Related Art FIG. 3 is a circuit diagram showing an example of a control device for a power converter in which an AC side of this kind is linked to a power system via a circuit breaker. In FIG. 3, the AC side of the power converter 2 is linked to the power system 1 via the circuit breaker 3. In addition, 4 is a DC power supply connected to the DC side of the power converter 2.
【０００３】一方、電力変換器２の交流側電流を電流検
出器５により検出し、電流指令値発生回路６からの出力
と共に電流制御回路７へ入力して、電力変換器２の交流
側電圧指令値を生成する。そして、この交流側電圧指令
値をゲートドライブ回路８へ入力して、電力変換器２を
構成する各スイッチ素子へのオン信号を生成する。On the other hand, the AC side current of the power converter 2 is detected by the current detector 5, and is input to the current control circuit 7 together with the output from the current command value generation circuit 6, and the AC side voltage command of the power converter 2 is supplied. Generate a value. Then, this AC side voltage command value is input to the gate drive circuit 8 to generate an ON signal to each switch element that constitutes the power converter 2.
【０００４】また、電力系統１に電圧低下や停電等の異
常が発生した場合には、系統電圧検出器９により電力系
統１の異常を検出する。そして、この検出信号を遮断器
制御回路１０へ入力して、その出力により遮断器３を動
作させる。When an abnormality such as a voltage drop or a power failure occurs in the power system 1, the system voltage detector 9 detects the power system 1 abnormality. Then, this detection signal is input to the circuit breaker control circuit 10, and the circuit breaker 3 is operated by its output.
【０００５】ところで、このような電力変換器の制御装
置において、遮断器３としては、通常、機械式の交流遮
断器や、サイリスタ等の自己消弧能力を持たない半導体
スイッチ素子等が用いられる。By the way, in such a control device for a power converter, as the circuit breaker 3, a mechanical AC circuit breaker, a semiconductor switch element such as a thyristor having no self-extinguishing ability, or the like is usually used.
【０００６】しかしながら、これらのスイッチ素子類
は、交流電流の零点でのみ遮断動作が可能であり、電流
の遮断に最大で電源周波数の半周期分の時間がかかる。
従って、電力系統１の異常を検知した後、電力系統１と
電力変換器２との間を速やかに切り放さなければならな
いような場合には、機械式の交流遮断器や、自己消弧能
力を持たない半導体スイッチ素子は、電流の遮断に要す
る時間が長くなるので、遮断器３に用いるのは不向きで
ある。However, these switching elements can perform the breaking operation only at the zero point of the alternating current, and the breaking of the current takes a maximum of half a cycle of the power supply frequency.
Therefore, when it is necessary to quickly separate the power system 1 and the power converter 2 after detecting the abnormality of the power system 1, a mechanical AC circuit breaker or a self-extinguishing capability is used. A semiconductor switching element that does not have a long switching time is not suitable for use as the circuit breaker 3.
【０００７】そこで、高速に遮断を行なう必要があるよ
うな場合には、直流遮断器や、ＧＴＯ、ＩＧＢＴ等の自
己消弧能力を持つ半導体スイッチ素子を、遮断器３に用
いることが必要となる。しかしながら、これらのスイッ
チ素子類は、価格や耐久性等の面で不利な点が多い。Therefore, when it is necessary to cut off at high speed, it is necessary to use a DC switch or a semiconductor switch element having a self-extinguishing ability such as GTO or IGBT for the breaker 3. . However, these switch elements have many disadvantages in terms of price and durability.
【０００８】[0008]
【発明が解決しようとする課題】以上のように、従来の
電力変換器の制御装置においては、電力系統と電力変換
器との間を速やかに切り放さなければならない場合に
は、直流遮断器や、自己消弧能力を持つ半導体スイッチ
素子を、遮断器に用いる必要があり、価格や耐久性等の
面で不利であるという問題があった。As described above, in the conventional control device for the power converter, when it is necessary to quickly disconnect the power system and the power converter from each other, a DC circuit breaker or a The semiconductor switch element having the self-extinguishing ability must be used for the circuit breaker, which is disadvantageous in terms of price and durability.
【０００９】本発明の目的は、交流遮断器や自己消弧能
力を持たない半導体スイッチ素子等を用いた場合でも、
電力系統と電力変換器との間を高速に切り放すことが可
能な電力系統と連携する電力変換器の制御装置を提供す
ることにある。It is an object of the present invention to use an AC circuit breaker or a semiconductor switch element having no self-extinguishing ability,
It is an object of the present invention to provide a control device for a power converter that cooperates with a power system, which enables high-speed disconnection between the power system and the power converter.
【００１０】[0010]
【課題を解決するための手段】上記の目的を達成するた
めに本発明では、交流側が遮断器を介して電力系統に連
携される電力変換器の制御装置において、電力系統との
連携点における電流を所望の値に制御する制御手段と、
電力系統の異常発生に伴う遮断器の動作検知信号を受け
取ると、電力変換器の交流側電圧指令値を電流遮断を促
進させるような値にする手段とを備えて成る。In order to achieve the above object, in the present invention, in the control device of the power converter in which the AC side is linked to the power system through the circuit breaker, the current at the point of cooperation with the power system And a control means for controlling to a desired value,
And a means for setting the AC side voltage command value of the power converter to a value that promotes current interruption when the operation detection signal of the circuit breaker due to the occurrence of an abnormality in the electric power system is received.
【００１１】ここで、特に上記電力変換器の交流側電圧
指令値を電流遮断を促進するような値にする手段として
は、電力変換器の交流側電圧指令値を連携点電流を減少
させる正または負の一定値にする回路で構成することが
望ましい。Here, in particular, as means for setting the AC side voltage command value of the power converter to a value that promotes current interruption, the AC side voltage command value of the power converter is set to a positive or negative value that decreases the cooperation point current. It is desirable to use a circuit having a constant negative value.
【００１２】また、上記電力変換器の交流側電圧指令値
を電流遮断を促進するような値にする手段としては、電
力変換器の制御手段の電流制御回路への指令値を零とす
る回路で構成することが望ましい。As means for setting the AC side voltage command value of the power converter to a value that promotes current interruption, a circuit for setting the command value to the current control circuit of the control means of the power converter to zero. It is desirable to configure.
【００１３】さらに、上記電力変換器の交流側電圧指令
値を電流遮断を促進するような値にする手段としては、
電力変換器の制御手段の電流制御回路への指令値を、現
在の連携点電流の値と逆極性の適当な値とする回路で構
成することが望ましい。Further, as means for setting the AC side voltage command value of the power converter to a value that promotes current interruption,
It is desirable to configure the command value to the current control circuit of the control means of the power converter to be a circuit having an appropriate value having a polarity opposite to the current value of the current at the cooperation point.
【００１４】[0014]
【作用】従って、本発明の電力系統と連携する電力変換
器の制御装置においては、電力系統に異常が発生して、
電力変換器を速やかに電力系統から切り放す必要が生じ
た場合に、電力変換器が連携点電流を減少させる電圧を
発生することにより、連携点の電流を速やかに零とし
て、遮断器の動作を高速化させることができる。Therefore, in the control device of the power converter which cooperates with the power system of the present invention, an abnormality occurs in the power system,
When it becomes necessary to quickly disconnect the power converter from the power system, the power converter generates a voltage that reduces the cooperation point current, so that the cooperation point current is quickly reduced to zero and the circuit breaker operates. It can speed up.
【００１５】この場合、特に電力変換器が連携点電流を
減少させることが可能な正または負の一定電圧を発生す
ることにより、連携点電流を速やかに零として、遮断器
の動作を高速化させることができる。この時、一定電圧
を遮断器の出し得る正または負の最大電圧値とした場合
には、遮断器の動作を最も高速化させることができる。In this case, in particular, the power converter generates a positive or negative constant voltage capable of reducing the cooperation point current, so that the cooperation point current is quickly reduced to zero and the operation of the circuit breaker is accelerated. be able to. At this time, when the constant voltage is set to the maximum positive or negative voltage value that can be output by the circuit breaker, the operation of the circuit breaker can be speeded up most.
【００１６】また、電力変換器が、その制御手段に電流
制御回路を持つ場合には、電流制御回路への指令値を零
として、連携点電流を零に制御することにより、遮断器
の動作を高速化させることができる。When the power converter has a current control circuit as its control means, the operation value of the circuit breaker is controlled by setting the command value to the current control circuit to zero and controlling the cooperation point current to zero. It can speed up.
【００１７】さらに、電力変換器の制御手段の電流制御
回路への指令値を現在の連携点電流の値と逆極性の一定
値とすることにより、連携点電流の極性を反転させるよ
うに制御を行ない、連携点電流の零点をより早く発生さ
せることで、遮断器の動作を高速化させることができ
る。この時、電流指令値を電力変換器の出し得る正また
は負の最大値とした場合には、遮断器の動作を最も高速
化させることができる。Further, by setting the command value to the current control circuit of the control means of the power converter to a constant value having a polarity opposite to the current value of the cooperation point current, control is performed so as to invert the polarity of the cooperation point current. By performing the operation and generating the zero point of the cooperation point current earlier, the operation of the circuit breaker can be speeded up. At this time, when the current command value is set to the maximum positive or negative value that the power converter can output, the operation of the circuit breaker can be speeded up most.
【００１８】[0018]
【実施例】以下、本発明の一実施例について図面を参照
して詳細に説明する。図１は、本発明による電力系統と
連携する電力変換器の制御装置の構成例を示す回路図で
あり、図３と同一要素には同一符号を付してその説明を
省略し、ここでは異なる部分についてのみ述べる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a circuit diagram showing a configuration example of a control device for a power converter that cooperates with a power system according to the present invention. The same elements as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. Only the part will be described.
【００１９】すなわち、本実施例の電力系統と連携する
電力変換器の制御装置は、図１に示すように、系統遮断
時電流指令発生回路１１と、電流指令値切換器１２と
を、図３に付加した構成としている。That is, as shown in FIG. 1, the control device for the power converter in cooperation with the power system of the present embodiment includes a system-interruption-time current command generation circuit 11 and a current command value switching device 12 as shown in FIG. The configuration is added to.
【００２０】ここで、系統遮断時電流指令発生回路１１
は、前記電力変換器２の交流側電圧指令値を電流遮断を
促進するような値にするためのもので、本例では、その
出力値を零としている。Here, the current command generating circuit 11 for system interruption
Is for setting the AC side voltage command value of the power converter 2 to a value that promotes current interruption, and in this example, its output value is zero.
【００２１】また、電流指令値切換器１２は、前記電流
指令値発生回路６からの出力と、系統遮断時電流指令発
生回路１１からの出力とを入力し、前記遮断器制御回路
１０からの遮断器動作検知信号がない場合には電流指令
値発生回路６からの出力を、遮断器制御回路１０からの
遮断器動作検知信号がある場合には系統遮断時電流指令
発生回路１１からの出力を、電流制御回路７へ切り換え
出力するものである。The current command value switching unit 12 receives the output from the current command value generating circuit 6 and the output from the system interruption current command generating circuit 11 and shuts off from the circuit breaker control circuit 10. If there is no breaker operation detection signal, the output from the current command value generation circuit 6 is output. If there is a breaker operation detection signal from the circuit breaker control circuit 10, the output from the system interruption current command generation circuit 11 is output. The output is switched to the current control circuit 7.
【００２２】次に、以上のように構成した本実施例の電
力系統と連携する電力変換器の制御装置の作用について
説明する。図１において、電力系統１に異常が発生した
場合には、遮断器制御回路１０からの遮断器動作検知信
号によって電流指令値切換器１２を動作させ、電流制御
回路７への入力を系統遮断時電流指令発生回路１１から
の出力に切り換える。この場合、系統遮断時電流指令発
生回路１１の出力は零としていることから、電流制御回
路７は、交流電流を電流指令値に近づけるような電圧指
令をゲートドライブ回路８に出力する。すると、電力変
換器２は、電流を減衰させる電圧を出力し、連携点電流
は零になる。一方、遮断器３には動作指令が入力されて
いるので、連携点電流が零になったところで、遮断器３
の遮断動作が完了する。Next, the operation of the control device for the power converter in cooperation with the power system of the present embodiment having the above-described structure will be described. In FIG. 1, when an abnormality occurs in the power system 1, the current command value switching device 12 is operated by the circuit breaker operation detection signal from the circuit breaker control circuit 10 to cut off the input to the current control circuit 7 when the system is disconnected. The output is switched from the current command generation circuit 11. In this case, since the output of the current command generation circuit 11 at the time of system interruption is set to zero, the current control circuit 7 outputs a voltage command to bring the alternating current close to the current command value to the gate drive circuit 8. Then, the power converter 2 outputs a voltage that attenuates the current, and the cooperation point current becomes zero. On the other hand, since the operation command is input to the circuit breaker 3, when the cooperation point current becomes zero, the circuit breaker 3
The interruption operation of is completed.
【００２３】上述したように、本実施例の電力系統と連
携する電力変換器の制御装置は、従来の電力変換器の制
御装置に、電力変換器２の交流側電圧指令値を電流遮断
を促進するような値にするために、その出力値を零とし
て出力する系統遮断時電流指令発生回路１１と、電流指
令値発生回路６からの出力と系統遮断時電流指令発生回
路１１からの出力とを入力し、遮断器制御回路１０から
の遮断器動作検知信号がない場合には電流指令値発生回
路６からの出力を、遮断器制御回路１０からの遮断器動
作検知信号がある場合には系統遮断時電流指令発生回路
１１からの出力を、電流制御回路７へ切り換え出力する
電流指令値切換器１２とを付加するようにしたものであ
る。As described above, the control device of the power converter that cooperates with the power system of this embodiment has the conventional control device of the power converter that the current command is applied to the AC side voltage command value of the power converter 2. In order to obtain such a value, a system interruption current command generation circuit 11 that outputs the output value as zero, an output from the current instruction value generation circuit 6 and an output from the system interruption current command generation circuit 11 are set. If there is no circuit breaker operation detection signal from the circuit breaker control circuit 10, the output from the current command value generation circuit 6 is output, and if there is a circuit breaker operation detection signal from the circuit breaker control circuit 10, the system is shut off. The output from the hour current command generation circuit 11 is added to a current command value switching unit 12 that switches and outputs the current control circuit 7.
【００２４】従って、電力変換器２の電流制御回路７へ
の指令値を調節することにより、遮断器３の遮断動作を
速やかに完了させることが可能となる。これにより、遮
断器３に対する責務を軽減して、動作時間を短縮するこ
とができ、電力系統１から速やかに電力変換器２を切り
放す必要があるような用途に対しても、機械式の交流遮
断器やサイリスタ等の自己消弧能力を持たない半導体ス
イッチ素子等を使用することができる。よって、価格や
耐久性等の面でも、問題が生じるようなことはない。Therefore, by adjusting the command value to the current control circuit 7 of the power converter 2, it becomes possible to quickly complete the breaking operation of the circuit breaker 3. As a result, the duty on the circuit breaker 3 can be reduced, the operating time can be shortened, and the mechanical alternating current is used even for applications in which the power converter 2 needs to be quickly disconnected from the power system 1. It is possible to use a semiconductor switch element or the like that does not have a self-extinguishing ability such as a circuit breaker or a thyristor. Therefore, there is no problem in terms of price and durability.
【００２５】次に、本発明の他の実施例について説明す
る。図２は、本発明による電力系統と連携する電力変換
器の制御装置の他の構成例を示す回路図であり、図３と
同一要素には同一符号を付してその説明を省略し、ここ
では異なる部分についてのみ述べる。Next, another embodiment of the present invention will be described. FIG. 2 is a circuit diagram showing another configuration example of the control device of the power converter that cooperates with the power system according to the present invention, the same elements as those in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted. Now, only different parts will be described.
【００２６】すなわち、本実施例の電力系統と連携する
電力変換器の制御装置は、図２に示すように、系統遮断
時電圧指令発生回路１３と、電圧指令値切換器１４と
を、図３に付加した構成としている。That is, as shown in FIG. 2, the control device for the power converter in cooperation with the power system of this embodiment includes a voltage command generation circuit 13 at the time of system interruption and a voltage command value switching unit 14, as shown in FIG. The configuration is added to.
【００２７】ここで、系統遮断時電圧指令発生回路１３
は、前記電力変換器２の交流側電圧指令値を電流遮断を
促進するような値にするためのもので、本例では、その
出力値を、電力変換器２の交流側電圧指令値を連携点電
流を減少させる正または負の一定値にする値としてい
る。Here, the voltage command generation circuit 13 at the time of system interruption
Is for making the AC side voltage command value of the power converter 2 a value that promotes current interruption. In this example, the output value is linked to the AC side voltage command value of the power converter 2. The value is a positive or negative constant value that reduces the point current.
【００２８】また、電圧指令値切換器１４は、前記電流
制御回路７からの出力と、系統遮断時電圧指令発生回路
１３からの出力とを入力し、前記遮断器制御回路１０か
らの遮断器動作検知信号がない場合には電流制御回路７
からの出力を、遮断器制御回路１０からの遮断器動作検
知信号がある場合には系統遮断時電圧指令発生回路１３
からの出力を、ゲートドライブ回路８へ切り換え出力す
るものである。The voltage command value switching unit 14 receives the output from the current control circuit 7 and the output from the voltage command generating circuit 13 at the time of system interruption, and operates the circuit breaker from the circuit breaker control circuit 10. If there is no detection signal, current control circuit 7
When there is a circuit breaker operation detection signal from the circuit breaker control circuit 10, the output from the circuit breaker voltage command generation circuit 13
The output from is switched to the gate drive circuit 8 and output.
【００２９】次に、以上のように構成した本実施例の電
力系統と連携する電力変換器の制御装置の作用について
説明する。図２において、電力系統１に異常が発生した
場合には、遮断器制御回路１０からの遮断器動作検知信
号によって電圧指令値切換器１４を動作させ、ゲートド
ライブ回路８への入力を系統遮断時電圧指令値発生回路
１３からの出力に切り換える。この場合、系統遮断時電
圧指令値発生回路１３の出力としては、連携点電流を減
少させることができる正または負の一定値の電圧指令値
としていることから、この値を電力変換器２が出し得る
最大の電圧（＝直流電圧）とすれば、遮断器３の遮断動
作は最も高速化される。すると、電力変換器２は、スイ
ッチの状態はオンまたはオフで固定される。そして、連
携点電流は減衰し、零に到達した段階で遮断器３の遮断
動作が完了する。Next, the operation of the control device for the power converter, which cooperates with the power system of the present embodiment having the above-described structure, will be described. In FIG. 2, when an abnormality occurs in the electric power system 1, the voltage command value switching unit 14 is operated by the circuit breaker operation detection signal from the circuit breaker control circuit 10 to shut off the input to the gate drive circuit 8 when the system is disconnected. The output is switched to the output from the voltage command value generation circuit 13. In this case, the output of the voltage command value generation circuit 13 at the time of system interruption is a voltage command value of a positive or negative constant value that can reduce the cooperation point current, and therefore the power converter 2 outputs this value. If the maximum voltage (= DC voltage) is obtained, the breaking operation of the circuit breaker 3 is most accelerated. Then, in the power converter 2, the state of the switch is fixed to ON or OFF. Then, the cooperation point current is attenuated, and the breaking operation of the circuit breaker 3 is completed when the current reaches zero.
【００３０】上述したように、本実施例の電力系統と連
携する電力変換器の制御装置は、従来の電力変換器の制
御装置に、電力変換器２の交流側電圧指令値を電流遮断
を促進するような値にするために、その出力値を電力変
換器２の交流側電圧指令値を連携点電流を減少させる正
または負の一定値にする値として出力する系統遮断時電
圧指令発生回路１３と、電流制御回路７からの出力と、
系統遮断時電圧指令発生回路１３からの出力とを入力
し、遮断器制御回路１０からの遮断器動作検知信号がな
い場合には電流制御回路７からの出力を、遮断器制御回
路１０からの遮断器動作検知信号がある場合には系統遮
断時電圧指令発生回路１３からの出力を、ゲートドライ
ブ回路８へ切り換え出力する電圧指令値切換器１４とを
付加するようにしたものである。As described above, the control device for the power converter that cooperates with the power system of this embodiment has the conventional control device for the power converter to promote the current cutoff of the AC side voltage command value of the power converter 2. In order to obtain such a value, the output voltage is output as the AC side voltage command value of the power converter 2 as a constant positive or negative value for reducing the cooperation point current. And the output from the current control circuit 7,
The output from the voltage command generation circuit 13 at the time of system interruption is input, and when there is no breaker operation detection signal from the circuit breaker control circuit 10, the output from the current control circuit 7 is cut off from the circuit breaker control circuit 10. When there is a device operation detection signal, the output from the voltage command generating circuit 13 at the time of system interruption is added to the voltage command value switching device 14 which switches and outputs it to the gate drive circuit 8.
【００３１】従って、電力変換器２の交流側電圧を正ま
たは負のある値で固定することにより、電力変換器２の
交流電流を速やかに減衰させて、遮断器３の遮断動作を
速やかに完了させることが可能となる。Accordingly, by fixing the AC side voltage of the power converter 2 to a certain positive or negative value, the AC current of the power converter 2 is quickly attenuated, and the breaking operation of the circuit breaker 3 is completed quickly. It becomes possible.
【００３２】これにより、遮断器３に対する責務を軽減
して、動作時間を短縮することができ、電力系統１から
速やかに電力変換器２を切り放す必要があるような用途
に対しても、機械式の交流遮断器やサイリスタ等の自己
消弧能力を持たない半導体スイッチ素子等を使用するこ
とができる。よって、価格や耐久性等の面でも、問題が
生じるようなことはない。As a result, the duty for the circuit breaker 3 can be reduced, the operating time can be shortened, and the machine can be used for applications in which the power converter 2 must be quickly disconnected from the power system 1. It is possible to use a semiconductor switch element or the like that does not have a self-extinguishing ability, such as a conventional AC circuit breaker or thyristor. Therefore, there is no problem in terms of price and durability.
【００３３】尚、本発明は上記各実施例に限定されるも
のではなく、次のようにしても同様に実施できるもので
ある。 （ａ）上記図１の実施例において、系統遮断時電流指令
発生回路１１の出力は、必ずしも零でなくてもよく、現
在流れている連携点電流の値と逆極性の適当な値とする
ようにしてもよい。The present invention is not limited to the above embodiments, but can be implemented in the same manner as described below. (A) In the embodiment of FIG. 1 described above, the output of the system interruption current command generation circuit 11 does not necessarily have to be zero, and is set to an appropriate value having a polarity opposite to that of the current value of the cooperation point current. You may
【００３４】この場合には、連携点電流は指令された値
に近づいていくが、電流極性を反転する際に必ず一度零
になる。一方、遮断器３には動作指令が入力されている
ので、連携点電流が零になった段階で遮断器３の遮断動
作が完了する。そして、この場合には、前述のように電
流指令値を単に零にする場合よりも、より一層速やかに
遮断器３の遮断動作が完了する。In this case, the cooperation point current approaches the commanded value, but it always becomes zero once the current polarity is reversed. On the other hand, since the operation command is input to the circuit breaker 3, the circuit breaker 3 completes the breaking operation when the cooperation point current becomes zero. Then, in this case, the breaking operation of the circuit breaker 3 is completed more quickly than in the case where the current command value is simply set to zero as described above.
【００３５】また、この時、電流制御回路７に与える指
令値を、電力変換器２が流し得る正または負の最大値と
した場合に、遮断器３の遮断動作は最も高速になる。 （ｂ）上記図１の実施例では、直流電源４が電圧源であ
る場合について説明したが、本実施例は電力変換器２へ
の電流指令値を変える方式であることから、直流電源４
が電流源である電力変換器の場合についても、本発明を
同様に適用することが可能である。At this time, when the command value given to the current control circuit 7 is set to the maximum positive or negative value that the power converter 2 can flow, the breaking operation of the circuit breaker 3 becomes the fastest. (B) In the embodiment of FIG. 1 described above, the case where the DC power supply 4 is a voltage source has been described. However, since this embodiment is a method of changing the current command value to the power converter 2, the DC power supply 4
The present invention can be similarly applied to the case of a power converter in which is a current source.
【００３６】（ｃ）上記図２の実施例では、電流制御回
路７を持つ電力変換器２に本発明を適用する場合につい
て説明したが、本実施例は電流指令値を用いないことか
ら、電流制御回路７を持たない電力変換器の場合につい
ても、本発明を同様に適用することが可能である。(C) In the embodiment shown in FIG. 2, the case where the present invention is applied to the power converter 2 having the current control circuit 7 has been described. However, since the present embodiment does not use the current command value, The present invention can be similarly applied to the case of a power converter that does not have the control circuit 7.
【００３７】[0037]
【発明の効果】以上説明したように本発明によれば、交
流側が遮断器を介して電力系統に連携される電力変換器
の制御装置において、電力系統との連携点における電流
を所望の値に制御する制御手段と、電力系統の異常発生
に伴う遮断器の動作検知信号を受け取ると、電力変換器
の交流側電圧指令値を電流遮断を促進させるような値に
する手段とを備えるようにしたので、交流遮断器や自己
消弧能力を持たない半導体スイッチ素子等を用いた場合
でも、電力系統と電力変換器との間を高速に切り放すこ
とが可能な電力系統と連携する電力変換器の制御装置が
提供できる。As described above, according to the present invention, in the control device of the power converter in which the AC side is linked to the power system via the circuit breaker, the current at the link point with the power system is set to a desired value. Control means for controlling, and means for setting the AC side voltage command value of the power converter to a value that promotes current interruption when receiving the operation detection signal of the circuit breaker due to the occurrence of an abnormality in the power system Therefore, even when using an AC circuit breaker or a semiconductor switch element that does not have self-extinguishing ability, it is possible to disconnect the power system and the power converter at high speed. A controller can be provided.
【図１】本発明による電力系統と連携する電力変換器の
制御装置の一実施例を示す回路図。FIG. 1 is a circuit diagram showing an embodiment of a control device for a power converter that cooperates with a power system according to the present invention.
【図２】本発明による電力系統と連携する電力変換器の
制御装置の他の実施例を示す回路図。FIG. 2 is a circuit diagram showing another embodiment of the control device for the power converter in cooperation with the power system according to the present invention.
【図３】従来による電力系統と連携する電力変換器の制
御装置の一例を示す回路図。FIG. 3 is a circuit diagram showing an example of a control device for a power converter that cooperates with a conventional power system.
１…電力系統、 ２…電力変換器、 ３…遮断器、 ４…直流電源、 ５…電流検出器、 ６…電流指令値発生回路、 ７…電流制御回路、 ８…ゲートドライブ回路、 ９…系統電圧検出器、 １０…遮断器制御回路、 １１…系統遮断時電流指令発生回路、 １２…電流指令値切換器、 １３…系統遮断時電圧指令発生回路、 １４…電圧指令値切換器。 DESCRIPTION OF SYMBOLS 1 ... Electric power system, 2 ... Power converter, 3 ... Circuit breaker, 4 ... DC power supply, 5 ... Current detector, 6 ... Current command value generating circuit, 7 ... Current control circuit, 8 ... Gate drive circuit, 9 ... System Voltage detector, 10 ... Circuit breaker control circuit, 11 ... System break-off current command generation circuit, 12 ... Current command value switcher, 13 ... System break-off voltage command generation circuit, 14 ... Voltage command value switcher.
Claims (4)
される電力変換器の制御装置において、 前記電力系統との連携点における電流を所望の値に制御
する制御手段と、 前記電力系統の異常発生に伴う遮断器の動作検知信号を
受け取ると、前記電力変換器の交流側電圧指令値を電流
遮断を促進させるような値にする手段と、 を備えて成ることを特徴とする電力系統と連携する電力
変換器の制御装置。1. A control device for a power converter in which an alternating current side is linked to a power system via a circuit breaker, a control means for controlling a current at a point of cooperation with the power system to a desired value, And a means for setting the AC side voltage command value of the power converter to a value that promotes current interruption upon receipt of an operation detection signal of the circuit breaker due to the occurrence of an abnormality, and a power system comprising: The control device of the power converter which cooperates.
流遮断を促進するような値にする手段としては、前記電
力変換器の交流側電圧指令値を連携点電流を減少させる
正または負の一定値にする回路で構成したことを特徴と
する請求項１に記載の電力系統と連携する電力変換器の
制御装置。2. The means for setting the AC side voltage command value of the power converter to a value that promotes the current interruption, the AC side voltage command value of the power converter is positive or negative for decreasing the cooperation point current. 2. The control device for the power converter in cooperation with the power system according to claim 1, wherein the control device controls the power converter.
流遮断を促進するような値にする手段としては、前記電
力変換器の制御手段の電流制御回路への指令値を零とす
る回路で構成したことを特徴とする請求項１に記載の電
力系統と連携する電力変換器の制御装置。3. A circuit for setting the command value to the current control circuit of the control means of the power converter to zero as means for setting the AC side voltage command value of the power converter to a value that promotes current interruption. The control device for the power converter according to claim 1, wherein the control device cooperates with the power system.
流遮断を促進するような値にする手段としては、前記電
力変換器の制御手段の電流制御回路への指令値を、現在
の連携点電流の値と逆極性の適当な値とする回路で構成
したことを特徴とする請求項１に記載の電力系統と連携
する電力変換器の制御装置。4. As a means for setting the AC side voltage command value of the power converter to a value that promotes current interruption, the command value to the current control circuit of the control means of the power converter is the current link value. The control device for a power converter that cooperates with a power system according to claim 1, wherein the control device is configured by a circuit having an appropriate value having a polarity opposite to that of the point current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7009799A JPH08205555A (en) | 1995-01-25 | 1995-01-25 | Controller for power converter in cooperation with power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7009799A JPH08205555A (en) | 1995-01-25 | 1995-01-25 | Controller for power converter in cooperation with power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08205555A true JPH08205555A (en) | 1996-08-09 |
Family
ID=11730250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7009799A Pending JPH08205555A (en) | 1995-01-25 | 1995-01-25 | Controller for power converter in cooperation with power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08205555A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003153450A (en) * | 2001-11-09 | 2003-05-23 | Mitsubishi Electric Corp | System ling apparatus |
| JP2009284762A (en) * | 2007-04-17 | 2009-12-03 | Nissin Electric Co Ltd | Countermeasure device against instantaneous voltage drop/power failure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654541A (en) * | 1992-07-27 | 1994-02-25 | Japan Atom Energy Res Inst | Power supply system of self-extinguishing ac power regulation |
| JPH06205586A (en) * | 1992-12-28 | 1994-07-22 | Mitsubishi Electric Corp | Converter controller |
| JPH06261402A (en) * | 1993-03-09 | 1994-09-16 | Toshiba Corp | Auxiliary power supply for vehicle |
| JPH06319225A (en) * | 1993-01-22 | 1994-11-15 | Nippon Hoso Kyokai <Nhk> | Dc switchgear |
-
1995
- 1995-01-25 JP JP7009799A patent/JPH08205555A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0654541A (en) * | 1992-07-27 | 1994-02-25 | Japan Atom Energy Res Inst | Power supply system of self-extinguishing ac power regulation |
| JPH06205586A (en) * | 1992-12-28 | 1994-07-22 | Mitsubishi Electric Corp | Converter controller |
| JPH06319225A (en) * | 1993-01-22 | 1994-11-15 | Nippon Hoso Kyokai <Nhk> | Dc switchgear |
| JPH06261402A (en) * | 1993-03-09 | 1994-09-16 | Toshiba Corp | Auxiliary power supply for vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003153450A (en) * | 2001-11-09 | 2003-05-23 | Mitsubishi Electric Corp | System ling apparatus |
| JP2009284762A (en) * | 2007-04-17 | 2009-12-03 | Nissin Electric Co Ltd | Countermeasure device against instantaneous voltage drop/power failure |
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