JPH02281310A - Reactive power generator and its control method - Google Patents
Reactive power generator and its control methodInfo
- Publication number
- JPH02281310A JPH02281310A JP1104140A JP10414089A JPH02281310A JP H02281310 A JPH02281310 A JP H02281310A JP 1104140 A JP1104140 A JP 1104140A JP 10414089 A JP10414089 A JP 10414089A JP H02281310 A JPH02281310 A JP H02281310A
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- Prior art keywords
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- control signal
- reactive
- value
- reactive current
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Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000010248 power generation Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 abstract description 22
- 238000009499 grossing Methods 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000001052 transient effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、電力系統の電圧に応じて可変容量の無効電
力を発生する無効電力発生装置（ＳＶＧ）の制御方法お
よび無効電力発生装置（ＳＶＧ）に関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for controlling a reactive power generator (SVG) that generates variable capacity reactive power according to the voltage of a power system, and a method for controlling a reactive power generator (SVG). ).
第４図は、例えば昭和５３年電気学会東京支部（新潟地
区）大会の論文集第１８７真に示された従来の無効電力
発生装置（ＳＶＧ）を示す概略構成図であり、図におい
て、ｌは電力系統、Ｖｓは電力系統ｌの系統電圧、２は
電力系統１に接続された自励式電圧型インバータ（以下
、単にインバータと称する）、Ｌは電力系統ｌとインバ
ータ２との間のインダクタ、Ｒは同じく抵抗、Ｖｉ は
インバータ２の出力電圧、３はインバータ２に接続され
た直流平滑用のコンデンサ、４は電力系統ｌの電流の実
際値を検出する電流検出器、５は電力系統１の電圧位相
を検出する位相検出器、６は電流検出器４で検出した電
流の実際値と位相検出器５で検出した電圧位相とから、
無効電流の実際値を算出する無効電流演算器、７は無効
電流演算器６で算出した無効電流実際値より、インバー
タ２の出力電圧Ｖｉを制御する制御信号を算出する無効
電流制御器である。８は無効電流制御器７で算出した制
御信号に基づいてインバータ２に供給するゲートパルス
信号を発生するパルス制御器である。FIG. 4 is a schematic configuration diagram showing a conventional reactive power generator (SVG) shown, for example, in the Proceedings of the 1973 IEEJ Tokyo Branch (Niigata Area) Conference, No. 187, and in the figure, l is In the power system, Vs is the system voltage of power system 1, 2 is a self-excited voltage type inverter (hereinafter simply referred to as an inverter) connected to power system 1, L is an inductor between power system 1 and inverter 2, and R is is the same resistance, Vi is the output voltage of inverter 2, 3 is a DC smoothing capacitor connected to inverter 2, 4 is a current detector that detects the actual value of the current of power system I, and 5 is the voltage of power system 1 A phase detector 6 detects the phase from the actual value of the current detected by the current detector 4 and the voltage phase detected by the phase detector 5.
A reactive current calculator 7 that calculates the actual value of the reactive current is a reactive current controller that calculates a control signal for controlling the output voltage Vi of the inverter 2 from the actual reactive current value calculated by the reactive current calculator 6. A pulse controller 8 generates a gate pulse signal to be supplied to the inverter 2 based on the control signal calculated by the reactive current controller 7.
第５図は第４図の無効電流制御器７の構成図であり、第
４図と同一部分には同一符号が付されている。なお、こ
の第５図の構成は、上記無効電力発生装置（ＳＶＧ）を
制御する従来の方法として、例えば特公昭５６−４７５
６４号公報に示されている。第５図において、７ａは無
効電流の目標値を設定する設定器、７ｂは無効電流演算
器６で算出した無効電流実際値と上記無効電流目標値と
の減算を行う減算要素、７Ｃは減算要素７ｂの出力に基
づいて、上記制御信号を作り、上記パルス制御器８に供
給する無効電流調節器である。FIG. 5 is a block diagram of the reactive current controller 7 shown in FIG. 4, and the same parts as in FIG. 4 are given the same reference numerals. The configuration shown in FIG. 5 is a conventional method for controlling the reactive power generator (SVG) described in Japanese Patent Publication No. 56-475, for example.
This is shown in Publication No. 64. In FIG. 5, 7a is a setting device for setting the target value of reactive current, 7b is a subtraction element that subtracts the actual reactive current value calculated by the reactive current calculator 6 and the reactive current target value, and 7C is a subtraction element. This is a reactive current regulator that generates the control signal based on the output of 7b and supplies it to the pulse controller 8.
次に動作について説明する。この装置は、無効電流演算
器６で算出した無効電流実際値を設定器７ａで設定した
無効電流目標値に一致させようと制御する。まず、電流
検出器４で検出された電力系統１の電流の実際値と、位
相検出器５で検出された電力系統１の電圧位相とに基づ
いて、無効電流演算器６は無効電流実際値を算出する。Next, the operation will be explained. This device controls the reactive current actual value calculated by the reactive current calculator 6 to match the reactive current target value set by the setting device 7a. First, based on the actual value of the current of the power system 1 detected by the current detector 4 and the voltage phase of the power system 1 detected by the phase detector 5, the reactive current calculator 6 calculates the actual value of the reactive current. calculate.
次に、第５図において、減算要素７ｂは上記無効電流実
際値と無効電流目標値との差を算出し、この差に応じて
無効電流調節器７Ｃはインバータ２の出力電圧Ｖｉを制
御する制御信号を算出する。この制御信号に基づいてパ
ルス制御器８はインバータ２を直接に制御するゲートパ
ルス信号を発生する。Next, in FIG. 5, the subtraction element 7b calculates the difference between the actual reactive current value and the target reactive current value, and the reactive current regulator 7C controls the output voltage Vi of the inverter 2 according to this difference. Calculate the signal. Based on this control signal, the pulse controller 8 generates a gate pulse signal that directly controls the inverter 2.
これによってインバータ２の出力電圧Ｖｉは、無効電流
実際値が無効電流目標値に一致するように制御される。As a result, the output voltage Vi of the inverter 2 is controlled so that the actual value of the reactive current matches the target value of the reactive current.
なお、インバータ２に接続されたコンデンサ３はインバ
ータ２内の直流電圧を平滑する。Note that a capacitor 3 connected to the inverter 2 smoothes the DC voltage within the inverter 2.
第６図は、定常状態における無効電力発生装置（ＳＶＧ
）の動作を説明するものであり、Ｖｉはインバータ２の
出力電圧、Ｖｓは電力系統１の系統電圧、Ｘはインバー
タ２と電力系統１間のインダクタＬ、抵抗Ｒから成るリ
アクタンスである。Figure 6 shows the reactive power generator (SVG) in steady state.
), where Vi is the output voltage of the inverter 2, Vs is the system voltage of the power system 1, and X is the reactance between the inverter 2 and the power system 1, consisting of an inductor L and a resistor R.
出力電圧Ｖｉは系統電圧Ｖｓと位相を等しくし、その大
きさのみ制御される。この時、電力系統１からの無効電
流実際値１ｑは路次式となる。The output voltage Vi has the same phase as the system voltage Vs, and only its magnitude is controlled. At this time, the actual value 1q of reactive current from the power system 1 becomes a road equation.
λ
よって、無効電流実際値１ｑが無効電流目標値より小さ
いときは、インバータ２の出力電圧Ｖｉを増加するよう
な制御信号を無効電流調節器７Ｃから発生して、無効電
流実際値１ｑを増加させ、逆に、無効電流実際値が無効
電流目標値より大きいときは、出力電圧Ｖｉを減少させ
て無効電流実際値１ｑを減少させる。λ Therefore, when the reactive current actual value 1q is smaller than the reactive current target value, a control signal for increasing the output voltage Vi of the inverter 2 is generated from the reactive current regulator 7C to increase the reactive current actual value 1q. Conversely, when the actual reactive current value is larger than the target reactive current value, the output voltage Vi is decreased to decrease the actual reactive current value 1q.
しかし、過渡状態においては、出力電圧Ｖｉを急激に変
化させると、電力系統ｌとインバータ２との間に有効電
流が流れ、その結果、直流平滑用のコンデンサ３の充放
電が行われる。従って、このコンデンサ３の両端電圧が
変動し、これに伴いインバータ２の出力電圧Ｖｉが変動
してしまい、所望の無効電流が得られなくなる。そのた
め、無効電流目標値はゆっくり変化させる必要がある。However, in a transient state, when the output voltage Vi is suddenly changed, an effective current flows between the power system 1 and the inverter 2, and as a result, the DC smoothing capacitor 3 is charged and discharged. Therefore, the voltage across the capacitor 3 fluctuates, and the output voltage Vi of the inverter 2 fluctuates accordingly, making it impossible to obtain a desired reactive current. Therefore, it is necessary to change the reactive current target value slowly.
従来の無効電力発生装置（ＳＶＧ）は以上のように構成
されているので、設定器７ａで設定される無効電流目標
値が急激に変化したとき、無効電流実際値が無効電流目
標値に一致するまでの応答時間が遅くなり、また、この
応答時間を速くしようとすると、無効電流実際値が不安
定になり、さらにコンデンサ３にかかる電圧変動が大き
いために、このコンデンサ３の容量を大きくする必要が
ある等の問題点があった。Since the conventional reactive power generator (SVG) is configured as described above, when the reactive current target value set by the setting device 7a changes suddenly, the reactive current actual value matches the reactive current target value. If you try to speed up this response time, the actual value of the reactive current will become unstable, and the voltage fluctuation across capacitor 3 will be large, so it is necessary to increase the capacitance of capacitor 3. There were some problems.
この発明は、上記のような問題点を解消するためになさ
れたもので、設定器で設定される無効電流目標値が急激
に変化したとき、無効電流実際値を速やかに且つ安定し
て無効電流目標値に一致させることかできると共に、コ
ンデンサ３にかかる電圧変動を小さくし、このコンデン
サの容量を小さくすることのできる無効電力発生装置（
ＳＶＧ）の制御方法および無効電力発生装置を得ること
を目的とする。This invention was made to solve the above-mentioned problems, and when the reactive current target value set by the setting device suddenly changes, the reactive current actual value can be quickly and stably changed to the reactive current value. A reactive power generator (
An object of the present invention is to obtain a control method and a reactive power generation device for SVG.
第１の請求項の発明に係る無効電力発生装置の制御方法
は、電力系統の有効電流実際値を検出すると共に、この
有効電流実際値により上記制御信号を補正するようにし
たものである。A method for controlling a reactive power generator according to the first aspect of the invention detects an actual value of active current in a power system, and corrects the control signal based on this actual value of active current.
第２の請求項の発明に係る無効電力発生装置は、検出手
段により検出された有効電流実際値を所定倍する乗算器
と、この乗算器からの出力信号と制御信号とを加算し、
補正制御信号とする加算器とを備えたものである。The reactive power generation device according to the invention of the second claim includes a multiplier that multiplies the actual value of active current detected by the detection means by a predetermined value, and adds an output signal from the multiplier and a control signal,
It is equipped with an adder that uses a correction control signal.
第１の請求項に係る無効電力発生装置の制御方法は、補
正制御信号により、インバータの出力電圧が制御される
ので、直流平滑用のコンデンサの充放電が抑制され、イ
ンバータの出力電圧の変動が低減される。In the method for controlling a reactive power generator according to the first claim, since the output voltage of the inverter is controlled by the correction control signal, charging and discharging of the DC smoothing capacitor is suppressed, and fluctuations in the output voltage of the inverter are suppressed. Reduced.
第２の請求項に係る無効電力発生装置は、乗算器で有効
電流実際値を所定倍した信号と、制御信号とを加算器で
加算し、補正制御信号となし、この補正制御信号により
インバータの出力電圧が制御されるので、直流平滑用の
コンデンサの充放電が抑制され、インバータの出力電圧
の変動が低減される。The reactive power generation device according to the second claim adds a signal obtained by multiplying the actual value of active current by a predetermined value using a multiplier and a control signal using an adder to obtain a corrected control signal, and uses this corrected control signal to control the inverter. Since the output voltage is controlled, charging and discharging of the DC smoothing capacitor is suppressed, and fluctuations in the output voltage of the inverter are reduced.
以下、この発明の一実施例を図について説明する。第１
図においては第４図と対応する部分には同一符号を付し
て説明を省略する。９は電流検出器４で検出した電流の
実際値と位相検出器５で検出した電圧位相とに基づいて
、電力系統１の有効電流実際値を算出する有効電流演算
器である。この有効電流演算器９と電流検出器４２位相
検出器５により有効電流実際値を検出する検出手段が構
成されている。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, parts corresponding to those in FIG. 4 are designated by the same reference numerals, and their explanation will be omitted. Reference numeral 9 denotes an active current calculator that calculates the actual value of the active current of the power system 1 based on the actual value of the current detected by the current detector 4 and the voltage phase detected by the phase detector 5. The effective current calculator 9, the current detector 42, and the phase detector 5 constitute a detection means for detecting the actual value of the effective current.
１０は無効電流制御器７から得られる制御信号を上記有
効電流実際値に応じて補正し、この補正された制御信号
をパルス制御器８に供給する補正手段で、この実施例で
は無効電流補助制御器１０が用いられている。Reference numeral 10 denotes a correction means for correcting the control signal obtained from the reactive current controller 7 according to the actual value of the active current and supplying the corrected control signal to the pulse controller 8, which in this embodiment is used for reactive current auxiliary control. A container 10 is used.
第２図は無効電流補助制御器ｌＯの構成と他の関連部分
を示し、第１図および第５図と同一部分には同一符号が
付されている。第２図において、１０ａは有効電流演算
器９から得られる有効電流実際値を所定の定数に倍する
乗算器、１０ｂは乗算器１０ａの出力信号と無効電流調
節器７Ｃから得られる制御信号とを加算し、その加算信
号を補正された制御信号（補正制御信号）としてパルス
制御器８に供給する加算器である。FIG. 2 shows the configuration of the reactive current auxiliary controller IO and other related parts, and the same parts as in FIGS. 1 and 5 are given the same reference numerals. In FIG. 2, 10a is a multiplier that multiplies the actual value of active current obtained from active current calculator 9 by a predetermined constant, and 10b is a multiplier that multiplies the output signal of multiplier 10a and the control signal obtained from reactive current regulator 7C. This is an adder that adds the signals and supplies the added signal to the pulse controller 8 as a corrected control signal (corrected control signal).
次に動作について説明する。この装置は、従来と同様に
、無効電流演算器６で算出した無効電流実際値を設定器
７ａで設定した無効電流目標値に一致させようと制御す
る。このために従来と同様にして、無効電流調節器７Ｃ
からは無効電流実際値を無効電流目標値に一致させるよ
うな制御信号が得られる。一方、有効電流演算器９は上
記電流の実際値と電圧位相とに基づいて、電力系統１の
有効電流実際値を算出して、第２図の乗算器１０ａに加
える。乗算器１０ａは上記有効電流実際値をに倍し、そ
の積の値が加算要素１０ｂにおいて、無効電流調節器７
ｃから得られる上記制御信号に加算されることにより、
この制御信号が補正される。この補正された制御信号（
補正制御信号）に応じてパルス制御器８はゲートパルス
信号を発生し、これによってインバータ２の出力電圧Ｖ
ｉが制御される。Next, the operation will be explained. As in the prior art, this device controls the actual reactive current value calculated by the reactive current calculator 6 to match the reactive current target value set by the setting device 7a. For this purpose, a reactive current regulator 7C is used in the same manner as before.
A control signal is obtained from which the actual value of the reactive current matches the target value of the reactive current. On the other hand, the active current calculator 9 calculates the actual value of the active current of the power system 1 based on the actual value of the current and the voltage phase, and adds it to the multiplier 10a in FIG. The multiplier 10a multiplies the active current actual value by , and the product value is added to the reactive current regulator 7 in the summing element 10b.
By being added to the above control signal obtained from c,
This control signal is corrected. This corrected control signal (
The pulse controller 8 generates a gate pulse signal in response to the correction control signal), thereby increasing the output voltage V of the inverter 2.
i is controlled.
定常状態において、無効電力発生装置（ＳＶＣ）は第６
図について前述したように動作し、この時電力系統１の
無効電流実際値１ｑは前記０式で表される。In steady state, the reactive power generator (SVC)
It operates as described above with reference to the figure, and at this time, the actual reactive current value 1q of the power system 1 is expressed by the above equation 0.
よって、インバータ２の出力電圧Ｖｉを増加すれば無効
電流実際値１ｑは増加し、出力電圧Ｖｉを減少すれば無
効電流実際値１ｑは減少する。Therefore, if the output voltage Vi of the inverter 2 is increased, the reactive current actual value 1q will increase, and if the output voltage Vi is decreased, the reactive current actual value 1q will be decreased.
しかし、過渡状態においては、出力電圧Ｖｉを急激に変
化させると、電力系統ｌとインバータ２との間に有効電
流が流れる。そこで、この有効電流実際値を有効電流演
算器９で算出して所定の定数にと掛は合わせ、この積の
値を無効電流調節器７Ｃから得られる制御信号に加えて
、この制御信号を補正する。その結果、直流平滑用のコ
ンデンサ３の充放電が制御信号に加えられた上記積の値
の分だけ抑制されるため、このコンデンサ３の両端電圧
は余り変動しなくなり、従って、インバータ２の出力電
圧Ｖｉの変動も小さくなる。すなわち、無効電流目標値
が急変した場合も、高速に所望の無効電流が得られるよ
うに制御することが可能となる。However, in a transient state, when the output voltage Vi is suddenly changed, an effective current flows between the power system l and the inverter 2. Therefore, this effective current actual value is calculated by the active current calculator 9, multiplied by a predetermined constant, and the value of this product is added to the control signal obtained from the reactive current regulator 7C to correct this control signal. do. As a result, the charging and discharging of the DC smoothing capacitor 3 is suppressed by the value of the above-mentioned product added to the control signal, so the voltage across this capacitor 3 does not fluctuate much, and therefore the output voltage of the inverter 2 Fluctuations in Vi also become smaller. That is, even if the reactive current target value suddenly changes, it is possible to perform control so that the desired reactive current can be obtained quickly.
なお、上記実施例においては、電力系統１の有効電流実
際値を有効電流演算器９で検出する例を示したが、第３
図に示すように、直流平滑用のコンデンサ３へ流れるコ
ンデンサ電流を検出する検出器１１を検出手段として設
けてもよい、何故ならば、有効電流が流れる時は、これ
に応じた大きさのコンデンサ電流が流れるので、第３図
のように、検出器１１で検出したコンデンサ電流に定数
Ｋを乗算して制御信号を補正しても、上記実施例と同様
の効果が得られる。In the above embodiment, an example was shown in which the actual value of the active current of the power system 1 is detected by the active current calculator 9, but the third
As shown in the figure, a detector 11 for detecting the capacitor current flowing to the DC smoothing capacitor 3 may be provided as a detection means, because when an effective current flows, a capacitor of a size corresponding to the current flows. Since a current flows, the same effect as in the above embodiment can be obtained even if the control signal is corrected by multiplying the capacitor current detected by the detector 11 by a constant K as shown in FIG.
また、上記実施例では、直流平滑用のコンデンサ３のコ
ンデンサ電流を直接に検出する例について説明したが、
このコンデンサ３の両端にかかる直流電圧を検出し、そ
の検出値を微分してコンデンサ電流を算出しても同様の
効果が得られる。Further, in the above embodiment, an example was explained in which the capacitor current of the DC smoothing capacitor 3 is directly detected.
A similar effect can be obtained by detecting the DC voltage applied across the capacitor 3 and differentiating the detected value to calculate the capacitor current.
以上のように、この第１の請求項に係る発明によれば、
インバータの出力電圧を制御する制御信号を、電力系統
の有効電流実際値に応じて補正するように構成したので
、無効電流実際値を速く且つ安定に無効電流目標値に一
敗させることができ、また、直流電圧変動も小さくでき
るので、直流平滑用のコンデンサを小容量にすることが
でき、装置が小型で安価となる効果がある。As described above, according to the invention according to the first claim,
Since the control signal for controlling the output voltage of the inverter is configured to be corrected according to the actual value of the active current of the power system, it is possible to quickly and stably bring the actual value of the reactive current to the target value of the reactive current. Furthermore, since DC voltage fluctuations can be reduced, the capacitance of the DC smoothing capacitor can be reduced, which has the effect of making the device smaller and cheaper.
また、第２の請求項に係る発明によれば、有効電流実際
値を乗算器で所定倍にした信号と制御信号とを加算器で
加算して補正制御信号とする構成にしたので、無効電流
実際値を速く且つ安定に無効電流目標値に一敗させるこ
とができ、また、直流電圧変動も小さくできるので、直
流平滑用のコンデンサを小容量にすることができ、装置
が小型で安価となる効果がある。Further, according to the invention according to the second claim, since the configuration is such that the signal obtained by multiplying the actual value of the effective current by a predetermined value using the multiplier and the control signal are added together using the adder to obtain the corrected control signal, the reactive current value is The actual value can be quickly and stably set to the reactive current target value, and DC voltage fluctuations can also be reduced, so the capacitance of the DC smoothing capacitor can be reduced, making the device smaller and cheaper. effective.
第１図はこの発明の一実施例による無効電力発生装置（
Ｓ Ｖ Ｇ）を示す概略構成図、第２図は同装置の無効
電流制御器を示す構成図、第３図はこの発明の他の実施
例による無効電力発生装置（ＳＶＧ）を示す概略構成図
、第４図は従来の無効電力発生装置（Ｓ Ｖ Ｇ）を示
す概略構成図、第５図は同装置の無効電流制御器を示す
構成図、第６図は同装置の動作を説明するための概略構
成図である。
１は電力系統、２は自励式電圧型インバータ、４は電流
検出器、５は位相検出器、６は無効電流演算器、７は無
効電流制御器、９は有効電流演算器、１０は無効電流補
助制御器。
なお、図中、同一符号は同一、又は相当部分を示す。
第２図
にFIG. 1 shows a reactive power generation device (
FIG. 2 is a schematic configuration diagram showing a reactive current controller of the device; FIG. 3 is a schematic configuration diagram showing a reactive power generator (SVG) according to another embodiment of the present invention. , Fig. 4 is a schematic configuration diagram showing a conventional reactive power generation device (S V G), Fig. 5 is a configuration diagram showing a reactive current controller of the device, and Fig. 6 is a diagram for explaining the operation of the device. FIG. 1 is a power system, 2 is a self-excited voltage type inverter, 4 is a current detector, 5 is a phase detector, 6 is a reactive current calculator, 7 is a reactive current controller, 9 is an active current calculator, 10 is a reactive current Auxiliary controller. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. In Figure 2
Claims (2)
上記電力系統の無効電流実際値が無効電流目標値に一致
するように、上記自励式電圧型インバータの出力電圧を
制御する制御信号を得る無効電力発生装置の制御方法に
おいて、上記電力系統の有効電流実際値を検出し、この
検出された有効電流実際値に応じて上記制御信号を補正
することを特徴とする無効電力発生装置の制御方法。(1) Connect the power system and the self-excited voltage type inverter,
In a method for controlling a reactive power generator that obtains a control signal for controlling an output voltage of the self-excited voltage type inverter so that an actual reactive current value of the power system matches a target value of reactive current, the active current of the power system A method for controlling a reactive power generator, comprising detecting an actual value and correcting the control signal according to the detected actual value of active current.
上記電力系統の無効電流実際値が無効電流目標値に一致
するように、上記自励式電圧型インバータの出力電圧を
制御する制御信号を得る無効電力発生装置において、上
記電力系統の有効電流実際値を検出する検出手段と、上
記検出手段で検出した有効電流実際値に所定の定数を乗
算する乗算器と、上記乗算器の出力信号と上記制御信号
とを加算し、その加算出力信号を補正制御信号とする加
算器とを備えたことを特徴とする無効電力発生装置。(2) Connect the power system and the self-excited voltage type inverter,
In a reactive power generator that obtains a control signal for controlling the output voltage of the self-excited voltage type inverter, the actual value of the active current of the power system is adjusted so that the actual value of the active current of the power system matches the target reactive current value. a detection means for detecting; a multiplier for multiplying the actual value of effective current detected by the detection means by a predetermined constant; and a multiplier for adding the output signal of the multiplier and the control signal, and using the added output signal as a correction control signal. What is claimed is: 1. A reactive power generation device comprising: an adder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1104140A JPH0833785B2 (en) | 1989-04-24 | 1989-04-24 | Control method of reactive power generation device and reactive power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1104140A JPH0833785B2 (en) | 1989-04-24 | 1989-04-24 | Control method of reactive power generation device and reactive power generation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02281310A true JPH02281310A (en) | 1990-11-19 |
| JPH0833785B2 JPH0833785B2 (en) | 1996-03-29 |
Family
ID=14372793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1104140A Expired - Lifetime JPH0833785B2 (en) | 1989-04-24 | 1989-04-24 | Control method of reactive power generation device and reactive power generation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0833785B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016025756A (en) * | 2014-07-22 | 2016-02-08 | 株式会社明電舎 | Power conversion device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872677A (en) * | 1981-10-27 | 1983-04-30 | Nippon Electric Ind Co Ltd | Electric generator with float system dalius type hydraulic turbine |
| JPS5937848A (en) * | 1982-08-26 | 1984-03-01 | 関西電力株式会社 | Control system for dc transmission system |
| JPS62118414A (en) * | 1985-11-18 | 1987-05-29 | Nissin Electric Co Ltd | Reactive power compensator |
-
1989
- 1989-04-24 JP JP1104140A patent/JPH0833785B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872677A (en) * | 1981-10-27 | 1983-04-30 | Nippon Electric Ind Co Ltd | Electric generator with float system dalius type hydraulic turbine |
| JPS5937848A (en) * | 1982-08-26 | 1984-03-01 | 関西電力株式会社 | Control system for dc transmission system |
| JPS62118414A (en) * | 1985-11-18 | 1987-05-29 | Nissin Electric Co Ltd | Reactive power compensator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016025756A (en) * | 2014-07-22 | 2016-02-08 | 株式会社明電舎 | Power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0833785B2 (en) | 1996-03-29 |
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