JPS63121474A - Parallel operation control for constant-voltage and constant-frequency power device - Google Patents
Parallel operation control for constant-voltage and constant-frequency power deviceInfo
- Publication number
- JPS63121474A JPS63121474A JP61267111A JP26711186A JPS63121474A JP S63121474 A JPS63121474 A JP S63121474A JP 61267111 A JP61267111 A JP 61267111A JP 26711186 A JP26711186 A JP 26711186A JP S63121474 A JPS63121474 A JP S63121474A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- frequency
- constant
- intermediate circuit
- current
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 abstract description 5
- 238000009499 grossing Methods 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
Landscapes
- Control Of Voltage And Current In General (AREA)
- Inverter Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、定電圧定周波数電源装置を並列運転する場
合に生ずる横流の有効分を抑制する定電圧定周波数電源
装置の並列運転方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a parallel operation system for constant voltage constant frequency power supplies that suppresses the effective portion of cross current that occurs when constant voltage constant frequency power supplies are operated in parallel.
第３図は定電圧定周波数電源装置を並列運転する場合の
従来例を示した回路図であって、２台の定電圧定周波数
電源装置（以下ではＣＶＣＦ装置と略記する）を並列運
転する場合をあられしている省略している。Fig. 3 is a circuit diagram showing a conventional example of parallel operation of constant voltage constant frequency power supply devices, in which two constant voltage constant frequency power supply devices (hereinafter abbreviated as CVCF device) are operated in parallel. It is omitted that it is hailing.
符号２なる２号ＣＶＣＦ装置の主回路は、交流を直流の
リップル分を吸収する平滑コンデンサ４と、平滑された
直流を入力して一定電圧で一定周波数の交流を出力する
サイリスタインバータ５とで構成されてお夛、このサイ
リスタインバータ５の出力交流電流が変流器７で、出力
交流電圧が計器用変圧器８で検出されたのち、負荷９へ
変換された交流電力を与えるのであるが、他方の１号Ｃ
ＶＣＦ装置ｌもその出力を負荷９へ供給しており、これ
の圧力電流が変流６で検出される。The main circuit of the No. 2 CVCF device, designated by reference numeral 2, consists of a smoothing capacitor 4 that absorbs the ripples of alternating current and direct current, and a thyristor inverter 5 that inputs the smoothed direct current and outputs alternating current at a constant voltage and constant frequency. Then, the output AC current of this thyristor inverter 5 is detected by a current transformer 7, and the output AC voltage is detected by a potential transformer 8, and then the converted AC power is provided to a load 9. No. 1 C
The VCF device 1 also supplies its output to the load 9, and its pressure current is detected by the current transformer 6.
またこの符号２なるＣＶＣＦ装置が一定電圧で一定周波
数の交流を出力するとともに、１号ＣＶＣＦ装置１との
並列運転を安定に行うような制御は次のようになされて
いる。すなわち電圧設定器１３で設定される電圧指令値
と、計器用変圧器８と電圧検出器１２とで検出される電
圧実際値との偏差を電圧調節器１４へ入力させることに
より、この入力偏差を零にするよう当該電圧調節器１４
から出力される制御信号が、パルス分配器１８を経てサ
イリスタインバータ５へ与えられることにより、このサ
イリスタインバータ５の出力電圧は、電圧設定器１３か
らの電圧指令値どお夛の値を維持する。Further, control is performed as follows so that this CVCF device numbered 2 outputs alternating current at a constant voltage and constant frequency, and stably operates in parallel with the CVCF device 1 No. 1. That is, by inputting the deviation between the voltage command value set by the voltage setting device 13 and the actual voltage value detected by the instrument transformer 8 and the voltage detector 12 to the voltage regulator 14, this input deviation can be corrected. The voltage regulator 14
A control signal output from the thyristor inverter 5 is supplied to the thyristor inverter 5 via the pulse distributor 18, so that the output voltage of the thyristor inverter 5 maintains a value equal to the voltage command value from the voltage setting device 13.
１号ＣＶＣＦ装置１からの電流が変流器６から横流電流
演算器１１へ、また２号ＣＶＣＦ装置２の出力電流が変
流器７から横流電流演算器１１へ入力されているので、
両ＣＶＣＦ装置間を流れる検流が有効分と無効分とに分
離して演算される。両ＣＶＣＦ装置１と２とが出力する
交流の電圧に差異があるとき、両者間を無効分横流が流
れ、これが横流電流演算器１１により演算されるので、
この横流電流演算器１１から得られる無効分横流を電圧
調節器１４へ入力させることで、両ＣＶＣＦ装置間を流
れる無効分横流電流を抑制する・
一方、２号ＣＶＣＦ装置２が出力する交流の周波数を基
準値に維持するために１次遅れフィルタ１５、周波数調
節器１６ならびく周波数発振器１７が設けられておシ、
１次遅れフィルタ１５と周波数調節器１６の出力が零の
ときに、この周波数調節器１６で制御されている周波数
発振器１７が基準周波数を発振するように調整されてお
ｐ、これがパルス分配器１８を経てサイリスタインバー
タ５へ与えられることによ）、当該サイリスタインバー
タ５の出力周波数は基準値を維持することとなる。Since the current from the No. 1 CVCF device 1 is input from the current transformer 6 to the cross-current current calculator 11, and the output current of the No. 2 CVCF device 2 is input from the current transformer 7 to the cross-current current calculator 11,
The galvanic current flowing between both CVCF devices is calculated by separating it into an effective part and an inactive part. When there is a difference in the AC voltages output by both CVCF devices 1 and 2, a reactive cross current flows between them, and this is calculated by the cross current calculator 11.
By inputting the reactive cross current obtained from this cross current calculator 11 to the voltage regulator 14, the reactive cross current flowing between both CVCF devices is suppressed. On the other hand, the frequency of the alternating current output by the No. 2 CVCF device 2 A first-order lag filter 15, a frequency adjuster 16, and a frequency oscillator 17 are provided to maintain the frequency at a reference value.
When the outputs of the first-order lag filter 15 and the frequency adjuster 16 are zero, the frequency oscillator 17 controlled by the frequency adjuster 16 is adjusted to oscillate the reference frequency, and this is the pulse distributor 18. (via the thyristor inverter 5), the output frequency of the thyristor inverter 5 maintains the reference value.
ここでたとえば周波数調節器１６にドリフトを生じると
、これの出力がフィードバックされて１次遅れフィルタ
１５へ入力されるので、このフィードバックループによ
〕、常時基準周波数を維持するように制御されることと
なる。For example, if a drift occurs in the frequency adjuster 16, its output is fed back and input to the first-order lag filter 15, so this feedback loop controls the reference frequency to be maintained at all times. becomes.
第３図に示すように１この２号ＣＶＣＦ装置２が１号Ｃ
ＶＣＦ装置１と並列運転するときに１両ＣＶＣＦ装置の
発振周波数に差があると、両者間を有効分横流電流が流
れるととＫなシ、横流電流演算器１１がこの有効分横流
電流を検出して、これを周波数調節器１６へ入力させる
とともに周波数発振器１７へも入力させることによシ、
一定の有効分横流電流が流れている状態で両ＣＶＣＦ装
置が平衡し、この平衡状態で並列運転しつつ負荷９へ電
力を供給する。As shown in Figure 3, 1 and 2 CVCF devices 2 and 1
When operating in parallel with the VCF device 1, if there is a difference in the oscillation frequency of one CVCF device, an effective cross current flows between the two, and the cross current calculator 11 detects this effective cross current. By inputting this to the frequency adjuster 16 and also inputting it to the frequency oscillator 17,
Both CVCF devices are balanced in a state where a constant effective cross-current current is flowing, and in this balanced state, power is supplied to the load 9 while operating in parallel.
しかしながら両ＣＶＣＦ装置が出力する交流の基準周波
数に差があるとき、両者を平衡させる有効分横流電流の
値は基準周波数差に比例するので、この基準周波数のず
れが大となれば有効分横流電流が増大し、この有効分横
流が流入する方のＣＶＣＦ装置は、その直流中間回路電
圧が上昇するので、この異常電圧によシ装置の耐圧がお
びやかされ、あるいは故障に至る不都合を生じる。However, when there is a difference in the reference frequency of the alternating current output by both CVCF devices, the value of the effective cross-current current that balances both is proportional to the reference frequency difference, so if the difference between the reference frequencies becomes large, the effective cross-current current increases, and the DC intermediate circuit voltage of the CVCF device into which this effective cross-current flows increases, and this abnormal voltage threatens the withstand voltage of the device or causes problems that may lead to failure.
この発明は、直流中間回路を介して電源側変換器と負荷
側変換器とを接続するように構成した定電圧定周波数電
源装置の複数組を並列運転するさいに、それぞれが出力
する交流の基準周波数に差異があっても、各定電圧定周
波数電源装置の間を流れる有効分横流電流を所定値以内
に抑制することができる定電圧定周波数電源装置の並列
運転制御方式を提供することを目的とする。This invention provides a standard for the alternating current that each unit outputs when multiple sets of constant voltage, constant frequency power supplies configured to connect a power supply side converter and a load side converter via a DC intermediate circuit are operated in parallel. The purpose of the present invention is to provide a parallel operation control method for constant voltage constant frequency power supplies that can suppress the effective cross current flowing between each constant voltage constant frequency power supply to within a predetermined value even if there is a difference in frequency. shall be.
この発明は、直流中間回路を介して電源側変換器と負荷
側変換器とを接続するように構成されている定電圧定周
波数電源装置の複数組を並列に接続して運転する場合に
１それぞれの定電圧定周波数電源装置の直流中間回路電
圧を検出して、これが所定値以上にならないよ５調節す
る信号を当該定電圧定周波数電源装置の周波数詞節回路
へ入力させてその出力周波数を上昇させることにより、
有効分横流電流による直流中間回路電圧の上昇を所定値
以下に抑制する。ま九有効分横流電流が相手側の装置へ
流入するのを検出すれば、これが所定値以上にならない
ように調節する信号をこちら側の定電圧定周波数電源装
置の周波数調節回路へ入力させてその出力周波数を低下
させることで、相手側へ流入する有効分横流電流を所定
値以下に抑制しようとするものである。This invention provides a method for operating multiple sets of constant voltage constant frequency power supplies configured to connect a power supply side converter and a load side converter via a DC intermediate circuit by connecting them in parallel. Detects the DC intermediate circuit voltage of the constant voltage constant frequency power supply device and inputs a signal to adjust the voltage so that it does not exceed a predetermined value to the frequency node circuit of the constant voltage constant frequency power supply device to increase its output frequency. By letting
The increase in DC intermediate circuit voltage due to effective cross current is suppressed to a predetermined value or less. If it is detected that the effective cross current flows into the device on the other side, a signal to adjust it so that it does not exceed a predetermined value is input to the frequency adjustment circuit of the constant voltage constant frequency power supply on the side. By lowering the output frequency, the effective cross current flowing into the other party is suppressed to a predetermined value or less.
第１図は本発明の実施例を示す回路図であり、この第１
図にもとづいて本発明の内容を以下に記載する。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
The content of the present invention will be described below based on the figures.
第１図においては符号１なる１号ＣＶＣＦ装置と、符号
２０なる２号ＣＶＣＦ装置とが相互に並列接続されて負
荷９に交流電力を供給する場合を図示しているが、１号
ＣＶＣＦ装置１の回路構成は、２号ＣＶＣＦ装置２０の
構成と全く同じであるので、その図示ならびに動作説明
は省略する。In FIG. 1, a case is shown in which a No. 1 CVCF device designated by the reference numeral 1 and a No. 2 CVCF device designated by the reference numeral 20 are connected in parallel with each other to supply AC power to a load 9. The circuit configuration is exactly the same as that of the No. 2 CVCF device 20, so illustration and operation description thereof will be omitted.
２号ＣＶＣＦ装置２０において、交流電源からの交流電
力は整流器３によシ直流に変換されて直流中間回路へ出
力されるのであるが、この直流中間回路には平滑コンデ
ンサ４が接続されていて、この直流電圧に含まれたリッ
プル分を除去している。In the No. 2 CVCF device 20, AC power from the AC power source is converted to DC by the rectifier 3 and output to the DC intermediate circuit, and a smoothing capacitor 4 is connected to this DC intermediate circuit. The ripple included in this DC voltage is removed.
このようにして平滑された直流は、サイリスタインバー
タ５によ）再び交流電力に変換されて負荷９へ供給され
るのであるが、このサイリスタインバータ５が出力する
交流電力は、計器用変圧器８と電圧検出器１２とＫより
検出される電圧実際値と、電圧設定器１３で定められる
電圧指令値との偏差を電圧調節器１４へ入力させ、この
入力偏差を零にするべく当該電圧調節器１４から出力さ
れる制御信号をパルス分配器１８を経てサイリスタイン
バータ５へ与えることによシ、その電圧を一定値に維持
する◇また周波数調節器１６の出力を１次遅れフィルタ
１５を介して周波数調節器１６へ入力させるよ５ｗ成さ
れたフィードバックループによシ、この周波数調節器１
６の出力が零のときに基準周波数を発振する周波数発振
器１７の出力を、上述のパルス分配器１８を介してサイ
リスタインバータ５へ与えることによシ、当該サイリス
タインバータ５が出力する交流の周波数を一定値に維持
できることは、第３図で既述の従来例回路の場合と同じ
である。The DC power smoothed in this way is converted back into AC power (by the thyristor inverter 5) and supplied to the load 9. The voltage regulator 14 inputs the deviation between the actual voltage value detected by the voltage detector 12 and K and the voltage command value determined by the voltage setting device 13 to the voltage regulator 14, and makes this input deviation zero. By giving the control signal output from the thyristor inverter 5 via the pulse distributor 18, the voltage is maintained at a constant value. Also, the output of the frequency regulator 16 is frequency adjusted via the first-order lag filter 15. This frequency adjuster 1 is input to the frequency adjuster 16 by a feedback loop formed by 5W
By applying the output of the frequency oscillator 17, which oscillates the reference frequency when the output of the thyristor inverter 6 is zero, to the thyristor inverter 5 via the pulse distributor 18, the frequency of the alternating current output by the thyristor inverter 5 can be changed. The ability to maintain a constant value is the same as in the conventional circuit described in FIG.
さらに、１号ＣＶＣＦ装置１の出力電流を変流器６で検
出し、また２号ＣＶＣＦ装置２０の出力電流を変流器７
で検出してこれらを横流電流演算器１１へ入力させるこ
とにより、この横流電流演算器１１からは、両ＣＶＣＦ
装置１と２０との間に流れる横流電流を有効分と無効分
とに分離して検出することができるので、無効分横流電
流を前述の電圧調節器１４へ入力させ、また有効分横流
電流を前述の周波数調節器１６と周波数発振器１７とへ
入力させることで、両ＣＶＣＦ装置は平衡状態で負荷９
へ電力を供給できることも、第３図にて既述の従来例回
路の場合と同じである。Furthermore, the output current of the No. 1 CVCF device 1 is detected by the current transformer 6, and the output current of the No. 2 CVCF device 20 is detected by the current transformer 7.
By detecting these and inputting them to the cross-current current calculator 11, the cross-current current calculator 11 detects both CVCFs.
Since the cross-current current flowing between the devices 1 and 20 can be detected separately into active and reactive components, the reactive cross-current current is input to the voltage regulator 14, and the effective cross-current current is input to the voltage regulator 14. By inputting it to the frequency adjuster 16 and frequency oscillator 17 described above, both CVCF devices can control the load 9 in a balanced state.
The fact that power can be supplied to the circuit is also the same as in the case of the conventional example circuit already described in FIG.
本発明においては、直流中間回路に中間回路電圧検出器
２１を設け、これの検出電圧と、中間回路電圧設定器２
２からの設定電圧との偏差を中間回路電圧調節器２３へ
入力させ、この中間回路電圧調節器２３からの出力の方
が周波数調節器１６の出力に優先してサイリスタインバ
ータ５の出力周波数を上昇させるように周波数発振器１
７を動作させる。In the present invention, an intermediate circuit voltage detector 21 is provided in the DC intermediate circuit, and the detected voltage and intermediate circuit voltage setter 2
The deviation from the set voltage from 2 is input to the intermediate circuit voltage regulator 23, and the output from the intermediate circuit voltage regulator 23 increases the output frequency of the thyristor inverter 5 by giving priority to the output from the frequency regulator 16. Frequency oscillator 1
Operate 7.
すなわち、２号ＣＶＣＦ装置２０が出力する交流の周波
数よりも１号ＣＶＣＦ装置１のそれの方が高ければ、有
効分横流電流によシ２号ＣＶＣＦ装置２０の直流中間回
路電圧が徐々に上昇し、その値が中間回路電圧設定器２
２で設定された値を越えると、中間回路電圧調節器２３
は直流電圧リミッタ回路として動作を開始し、この中間
回路電圧調節器２３の出力電圧で定まる発振周波数の方
が、周波数調節器１６の出力電圧で定まる発振周波数よ
りも優先して周波数発振器１７に作用するととくなり、
これによシサイリスタインバータ５が出力する交流の周
波数が上昇し、直流中間回路電圧を低下させる。その結
果有効分横流電流の流入がなくなる。In other words, if the frequency of the AC output from the No. 2 CVCF device 20 is higher than that of the No. 1 CVCF device 1, the DC intermediate circuit voltage of the No. 2 CVCF device 20 will gradually increase due to the effective cross current. , whose value is intermediate circuit voltage setter 2
If the value set in 2 is exceeded, the intermediate circuit voltage regulator 23
starts operating as a DC voltage limiter circuit, and the oscillation frequency determined by the output voltage of the intermediate circuit voltage regulator 23 acts on the frequency oscillator 17 with priority over the oscillation frequency determined by the output voltage of the frequency regulator 16. Then,
As a result, the frequency of the alternating current output from the systhyrist inverter 5 increases, and the DC intermediate circuit voltage decreases. As a result, there is no inflow of effective cross current.
第２図は本発明の第２の実施例を示す回路図であるが、
この第２図に図示している１号ＣＶＣＦ装菅１、変流器
６、負荷９は第１図に示す実施例回路と同じである。ま
た２号ＣＶＣＦ装置３０を構成するもののうち下記のも
の、すなわち整流器３、平滑コンデンサ４、サイリスタ
インバータ５、変流器７、計器用変圧器８、横流電流演
算器１１、電圧検出器１２、電圧設定器１３、電圧調節
器１４．１次遅れフィルタ１５、周波数調節器１６、周
波数発振器１７、パルス分配器１８、中間回路電圧検出
器２１、中間回路電圧設定器２２ならびに中間回路電圧
調節器２３は、第１図に示す実施例回路に記載のものと
、名称・用途・機能が同じであるから、これらの説明は
省略する。FIG. 2 is a circuit diagram showing a second embodiment of the present invention,
The No. 1 CVCF equipment 1, current transformer 6, and load 9 shown in FIG. 2 are the same as the embodiment circuit shown in FIG. In addition, the following components of the No. 2 CVCF device 30 are included: a rectifier 3, a smoothing capacitor 4, a thyristor inverter 5, a current transformer 7, a voltage transformer 8, a cross current calculator 11, a voltage detector 12, a voltage The setting device 13, the voltage regulator 14, the first-order lag filter 15, the frequency regulator 16, the frequency oscillator 17, the pulse divider 18, the intermediate circuit voltage detector 21, the intermediate circuit voltage setting device 22, and the intermediate circuit voltage regulator 23. , the name, purpose, and function are the same as those described in the embodiment circuit shown in FIG. 1, and therefore the description thereof will be omitted.
第２図に示す第２の実施例回路においては、有効横流設
定器３２と、これで設定される値と横流電流演算器１１
から出力される有効分横流との偏差を入力する有効横流
調節器３３とを備え、この有効横流調節器３３の出力が
周波数調節器１６の出力に優先してサイリスタインバー
タ５の出力周波数を低下させる。In the second embodiment circuit shown in FIG.
and an effective cross-flow regulator 33 that inputs the deviation from the effective cross-flow output from the thyristor inverter 5. .
すなわち２号ＣＶＣＦ装［３０が出力する交流の周波数
の方が、１号ＣＶＣＦ装置ｌのそれよシも高ければ、そ
の周波数差異により流れる有効分横流電流が有効横流設
定器３２で設定した値を越えるとき、周波数調節器１６
に優先して、リミッタとして動作する有効横流調節器３
３の出力によシ当該サイリスタインバータ５の出力周波
数を低下させることにより、相手方すなわち１号ＣＶＣ
Ｆ装置１へ横流電流を流し込まないように動作する。In other words, if the frequency of the alternating current output by the No. 2 CVCF device [30] is higher than that of the No. 1 CVCF device, the effective cross current flowing due to the frequency difference will exceed the value set by the effective cross current setting device 32. When exceeding the frequency adjuster 16
Effective cross-flow regulator 3 operating as a limiter in priority to
By lowering the output frequency of the thyristor inverter 5 according to the output of
It operates to prevent cross current from flowing into the F device 1.
この発明によれば、直流中間回路を介して電源側変換器
と負荷側変換器とを接続することで構成され、一定電圧
・−定周波数の交流を出力するように構成された定電圧
定周波数を像装置の複数組を並列に接続して運転するさ
いに、各電源装置が出力する交流の周波数に差異がある
ため、周波数の低い装置の直流中間回路電圧が所定値以
上に上昇すると、リミッタとして動作する中間回路電圧
調節手段の出力が、周波数調節手段に優先してその電源
装置の周波数を上昇させることで直流中間回路電圧が異
常値になるのを抑制し、また周波数が高すぎる場合には
有効分横流電流が所定値以上になったときにリミッタと
して動作する有効横流調節手段の出力によシ、周波数調
節手段の出力に優先して当該電源装置が出力する交流の
周波数を低下させるようにして、相手側の電源装置へ横
流電流を流入させないようにし、相互の出力周波数に差
異があっても、一定値以上の横流を流すことなく、安定
な並列運転をすることができる効果を発揮する。According to this invention, a constant voltage constant frequency device is configured by connecting a power supply side converter and a load side converter via a DC intermediate circuit, and is configured to output an alternating current of constant voltage and -constant frequency. When operating multiple sets of imaging devices connected in parallel, each power supply device outputs a different AC frequency, so if the DC intermediate circuit voltage of the lower frequency device rises above a predetermined value, the limiter The output of the intermediate circuit voltage regulating means, which operates as a device, increases the frequency of the power supply device with priority over the frequency regulating means, thereby suppressing the DC intermediate circuit voltage from reaching an abnormal value, and also suppressing the DC intermediate circuit voltage from reaching an abnormal value when the frequency is too high. is configured to reduce the frequency of the alternating current outputted by the power supply device in preference to the output of the frequency adjustment means, depending on the output of the effective cross-current adjustment means that operates as a limiter when the effective cross-current current exceeds a predetermined value. This prevents cross-current current from flowing into the power supply on the other side, and even if there is a difference in the output frequencies, stable parallel operation can be performed without flowing cross-current exceeding a certain value. do.
第１図は本発明の実施例を示す回路図、第２図は本発明
の第２の実施例を示す回路図、第３図は定電圧定周波数
電源装置を並列運転する場合の従来例を示した回路図で
ある。
１・・・・・・１号ＣＶＣＦ装置、２．２０．３０・・
・・・・２号ＣＶＣＦ装置、３・・・・・・整流器、４
・・・・・・平滑コンデンサ、５・・・・・・サイリス
タインバータ、６．７・・・・・・変流器、８・・・・
・・計器用変圧器、９・・・・・・負荷、１１・・・・
・・横流電流演算器、１２・・・・・・電圧検出器、１
３・・・・・・電圧設定器、１４・・・・・・電圧調節
器、１５・・・・・・１次遅れフィルタ、１６・・・・
・・周波数調節器、１７・・・・・・周波数発振器、１
８・・・・・・パルス分配器、２１・・・・・・中間回
路電圧検出器、２２・・・・・・中間回路電圧設定器、
２３・・・・・・中間回路電圧調節器、３２・・・・・
・有効横流設定器、３３・・・・・・有効横流調節器。
、−曽一
・１人！１？士 、１ノ ロ ム １．。Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing a second embodiment of the invention, and Fig. 3 is a conventional example of parallel operation of constant voltage constant frequency power supplies. FIG. 1...No. 1 CVCF device, 2.20.30...
...No. 2 CVCF device, 3... Rectifier, 4
... Smoothing capacitor, 5 ... Thyristor inverter, 6.7 ... Current transformer, 8 ...
...Instrument transformer, 9...Load, 11...
...Cross current calculator, 12... Voltage detector, 1
3... Voltage setting device, 14... Voltage regulator, 15... First-order lag filter, 16...
...Frequency adjuster, 17...Frequency oscillator, 1
8... Pulse distributor, 21... Intermediate circuit voltage detector, 22... Intermediate circuit voltage setter,
23... Intermediate circuit voltage regulator, 32...
・Effective cross-flow setting device, 33...Effective cross-flow adjuster. , - Soichi, 1 person! 1? 1. .
Claims (1)
直流中間回路を介して接続し、電源側変換器へ交流を入
力させるとき、負荷側変換器から出力する交流の電圧と
周波数を電圧調節手段と周波数調節手段とによりそれぞ
れを所定値に制御するようにしている定電圧定周波数電
源装置の複数組を並列運転するさいに、各定電圧定周波
電源に流れる横流の無効分と有効分とを検出し、この横
流無効分は当該定電圧定周波数電源装置の前記電圧調節
手段へ入力させ、横流有効分は前記周波数調節手段へ入
力させるようにしている定電圧定周波数電源装置の並列
運転制御方式において、前記定電圧定周波数電源装置の
直流中間回路電圧が所定値以上に上昇したことを検出す
れば、当該定電圧定周波数電源装置の周波数調節手段に
優先して、その出力交流の周波数を上昇させ、あるいは
横流有効分が所定値以上になったことを検出すれば、当
該定電圧定周波数電源装置の周波数調節手段に優先して
、その出力交流の周波数を降下させることを特徴とする
定電圧定周波数電源装置の並列運転制御方式。1) When connecting the DC side of the power-side converter and the DC side of the load-side converter via a DC intermediate circuit and inputting AC to the power-side converter, the AC voltage output from the load-side converter and When multiple sets of constant voltage constant frequency power supplies whose frequencies are controlled to predetermined values by voltage adjustment means and frequency adjustment means are operated in parallel, the reactive portion of the cross current flowing through each constant voltage constant frequency power supply is A constant voltage constant frequency power supply device that detects a cross current reactive component and an effective component, inputs the reactive cross current component to the voltage adjusting means of the constant voltage constant frequency power supply device, and inputs the effective cross current component to the frequency adjusting device. In the parallel operation control method, if it is detected that the DC intermediate circuit voltage of the constant voltage constant frequency power supply device has increased to a predetermined value or more, the output of the constant voltage constant frequency power supply device is prioritized over the frequency adjustment means of the constant voltage constant frequency power supply device. If it is detected that the frequency of the alternating current is increased or that the cross current effective component has exceeded a predetermined value, the frequency adjustment means of the constant voltage constant frequency power supply device is prioritized to lower the frequency of the output alternating current. Parallel operation control method for constant voltage constant frequency power supply equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61267111A JPH07108094B2 (en) | 1986-11-10 | 1986-11-10 | Parallel operation control method for constant voltage constant frequency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61267111A JPH07108094B2 (en) | 1986-11-10 | 1986-11-10 | Parallel operation control method for constant voltage constant frequency power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63121474A true JPS63121474A (en) | 1988-05-25 |
| JPH07108094B2 JPH07108094B2 (en) | 1995-11-15 |
Family
ID=17440215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61267111A Expired - Lifetime JPH07108094B2 (en) | 1986-11-10 | 1986-11-10 | Parallel operation control method for constant voltage constant frequency power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07108094B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0515070A (en) * | 1991-04-22 | 1993-01-22 | Mitsubishi Electric Corp | Parallel operation control device |
| JPH05184154A (en) * | 1991-12-27 | 1993-07-23 | Mitsubishi Electric Corp | Parallel operation controller for ac output converter |
| US5327336A (en) * | 1992-01-08 | 1994-07-05 | Fuji Electric Co., Ltd. | Constant voltage constant frequency inverter and method for controlling the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51118036A (en) * | 1975-04-10 | 1976-10-16 | Fuji Electric Co Ltd | Parallel running controller of self- excitation inverter |
| JPS6022223A (en) * | 1983-07-19 | 1985-02-04 | Meidensha Electric Mfg Co Ltd | Ac power supply system using solar battery |
-
1986
- 1986-11-10 JP JP61267111A patent/JPH07108094B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51118036A (en) * | 1975-04-10 | 1976-10-16 | Fuji Electric Co Ltd | Parallel running controller of self- excitation inverter |
| JPS6022223A (en) * | 1983-07-19 | 1985-02-04 | Meidensha Electric Mfg Co Ltd | Ac power supply system using solar battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0515070A (en) * | 1991-04-22 | 1993-01-22 | Mitsubishi Electric Corp | Parallel operation control device |
| JPH05184154A (en) * | 1991-12-27 | 1993-07-23 | Mitsubishi Electric Corp | Parallel operation controller for ac output converter |
| US5327336A (en) * | 1992-01-08 | 1994-07-05 | Fuji Electric Co., Ltd. | Constant voltage constant frequency inverter and method for controlling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07108094B2 (en) | 1995-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4426611A (en) | Twelve pulse load commutated inverter drive system | |
| CA2174684C (en) | Rectifier control system | |
| US3461374A (en) | Converter circuit for regulating voltage by regulation of frequency | |
| JPH0638711B2 (en) | DC power supply for inverter | |
| US4473790A (en) | Control circuit for suppression of line resonances in current feedback pulse width modulation control systems with a minimum d-c filter | |
| EP0376728A2 (en) | Circuit and method for voltage regulation of electric power sources | |
| JPS63121474A (en) | Parallel operation control for constant-voltage and constant-frequency power device | |
| US6946822B2 (en) | DC/DC converter with filter for limiting the oscillation of the input current and associated method | |
| JP2000236628A (en) | Control method for active filters | |
| JPH04222463A (en) | Current command circuit of power conversion device | |
| JPS6268074A (en) | Controller for thyristor converter | |
| JPH057956B2 (en) | ||
| SU1712946A1 (en) | Multichannel d c voltage regulator | |
| JPH02155460A (en) | Power converter | |
| JPH0315277A (en) | Controlling circuit for three-phase inverter device | |
| SU789984A1 (en) | Stabilized dc voltage source | |
| JPH04217872A (en) | Control circuit for inverter and parallel operation control circuit for inverter | |
| JPS62262666A (en) | Cross-current control circuit for constant voltage constant frequency inverter | |
| JPH09172772A (en) | Power supply apparatus having drooping characteristics of output voltage | |
| JPH0127439Y2 (en) | ||
| JPS60216772A (en) | Abnormal voltage detector of power converter | |
| JP2737311B2 (en) | Inverter voltage control circuit | |
| JPS6315671A (en) | Cross current control circuit of inverter device with constant voltage and constant frequency | |
| JPS6148724B2 (en) | ||
| JPS5895985A (en) | Controller for output voltage of inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |