JPS63146113A - Reactive power controller - Google Patents
Reactive power controllerInfo
- Publication number
- JPS63146113A JPS63146113A JP61294297A JP29429786A JPS63146113A JP S63146113 A JPS63146113 A JP S63146113A JP 61294297 A JP61294297 A JP 61294297A JP 29429786 A JP29429786 A JP 29429786A JP S63146113 A JPS63146113 A JP S63146113A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- overcurrent
- output
- current
- reactive power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007423 decrease Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract 2
- 238000001514 detection method Methods 0.000 description 17
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 240000001548 Camellia japonica Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000018597 common camellia Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
【発明の詳細な説明】
A、産業上の利用分野
本発明は、インバータと電力系統のような他電源とを連
繋運転した場合の無効電力制御装置に係わり、%に電圧
制御ループに無効電力による電圧垂下特性をもたせたも
のに関する。[Detailed Description of the Invention] A. Industrial Field of Application The present invention relates to a reactive power control device when an inverter and another power source such as a power system are operated in conjunction with each other, and the present invention relates to a reactive power control device when an inverter and another power source such as a power system are operated in conjunction with each other. It relates to something with voltage droop characteristics.
B1発明の概要
インバータを他電源と連繋運転し、インバータの出力電
圧と出力電流の位相を検出し、この位相差が設定値以上
になったときに自動電圧制御回路によシ前記インバータ
の電圧を制御して位相差を設定値以内1:なるよう5二
制御するものにおいて、前記インバータの出力過電流を
検出して設定値以上の過電流になったときC:相反する
方向の2つの垂下特性信号を出力する手段と、インバー
タの出力電流の出力電圧に対する位相差を検出し、進み
、遅れによって前記2つの信号を選択して自動電圧制御
回路に人力する手段とを備え、進み電流の過を流に対し
てインバータ出力電圧をと昇させ、遅れ電流の過電流に
対してインバータ出力電圧を低下させて過電流制限を行
なうことを特徴とする。B1 Summary of the Invention An inverter is operated in conjunction with another power source, the phase of the output voltage and output current of the inverter is detected, and when this phase difference exceeds a set value, the voltage of the inverter is controlled by an automatic voltage control circuit. When the output overcurrent of the inverter is detected and the overcurrent exceeds the set value, C: Two drooping characteristics in opposite directions. The present invention is equipped with means for outputting a signal, and means for detecting the phase difference between the output current of the inverter and the output voltage, and selecting the two signals according to lead and lag, and manually inputting the signals to the automatic voltage control circuit. It is characterized in that the inverter output voltage is increased in response to the overcurrent of the delayed current, and the inverter output voltage is decreased in response to the overcurrent of the delayed current to perform overcurrent limitation.
C6従来の技術
電力系統等(=おいては、送電系統が長距離、大容量化
してリアクタンスが大となると、安定度の維持が重要な
昧題となり、この安定度向上のために電圧形イ/パータ
ζ二よる無効電力補償が行なわれている。この制御方式
は、一般(;電圧制御ループに無効電力1:よる電圧垂
下特性をもたせている。C6 Conventional technology In electric power systems, etc., as power transmission systems become longer distances and have larger capacities, resulting in greater reactance, maintaining stability becomes an important issue. Reactive power compensation is performed by the /parter ζ2.This control method generally gives the voltage control loop a voltage drooping characteristic due to the reactive power 1:.
即ち、第3図は、従来の此種インバータと他電源との連
繋運転による無効電力制御回路で、1は後述のインバー
タと連繋運転される他電源、2は他電源1に接続された
負荷、Lはリアクタンス、3は交流電源ACの電力を整
流する整流器、4は、インバータで、直流入力側は整流
器3に、また交流出力側はしゃ断器CBを介して前記の
他電源1に接続されている。5は無効電力検出回路で、
インバータ4の出力電圧と出力電流を電圧検出器2丁と
電流検出器CTより取り出してこれを入力とし、電圧と
電流の位相差を検出する。Bは、無椿無効電力制御増巾
器で、無効電力検出回路5で検出された位相差に比例し
た信号を無効電力設定器S1と比較してその差の信号を
増巾する。7は前記電圧検出器PTの出力電圧を直流信
号に置換する交−直変換回路、8は、過電流垂下特性回
路で、前記電流検出器CTの出力を入力し、その出力が
過電流設定器S2で設定した過゛1流以上流れ九とき出
力信号を急激に減小させる。9は、比較器で、出力電圧
設定器SSの設定;直と丈−直R換回路7とを比較し、
また無効電力制御増巾器8の出力及インバータのゲート
回路11に入力され、該ゲート回路11を制御してイン
バータの出力電圧を制御する。That is, FIG. 3 shows a conventional reactive power control circuit that operates in conjunction with this type of inverter and another power source, where 1 is another power source that is operated in conjunction with the inverter, which will be described later, 2 is a load connected to the other power source 1, L is a reactance, 3 is a rectifier that rectifies the power of the AC power source AC, and 4 is an inverter, the DC input side is connected to the rectifier 3, and the AC output side is connected to the other power source 1 via the breaker CB. There is. 5 is a reactive power detection circuit;
The output voltage and output current of the inverter 4 are extracted from two voltage detectors and a current detector CT, and are used as input to detect the phase difference between the voltage and current. B is a non-camellia reactive power control amplifier which compares a signal proportional to the phase difference detected by the reactive power detection circuit 5 with the reactive power setting device S1 and amplifies the difference signal. 7 is an AC-DC converter circuit that replaces the output voltage of the voltage detector PT with a DC signal; 8 is an overcurrent droop characteristic circuit that inputs the output of the current detector CT; When the flow exceeds the one set in S2, the output signal is suddenly decreased. 9 is a comparator that compares the setting of the output voltage setting device SS; direct and length-direct R conversion circuit 7;
The output of the reactive power control amplifier 8 is also input to the gate circuit 11 of the inverter, and the gate circuit 11 is controlled to control the output voltage of the inverter.
無効電力の制御は、インバータ4の出力電圧を系統電圧
よシも大きくするとインバータ41111から系統側に
遅相無効電力を供給(系統側から進相無効電力をとる)
シ、またインバータ4の出力電圧を系統電圧よシ小さく
すれば逆にインバータ側から系統側ζ:進相無効電力を
供給し系統側の力率が調整される。即ち無効電力が無効
電力設定器S1の設定値以上なると自動電圧制御回路1
0によシインパータ4の出力電圧を下げる方向にゲート
回路11を制御して進相無効電力を供給する。To control reactive power, when the output voltage of inverter 4 is made larger than the grid voltage, inverter 41111 supplies lagging reactive power to the grid side (taking leading phase reactive power from the grid side).
In addition, if the output voltage of the inverter 4 is made smaller than the grid voltage, conversely, the inverter side supplies the grid side ζ: phase-advanced reactive power, and the power factor on the grid side is adjusted. That is, when the reactive power exceeds the set value of the reactive power setting device S1, the automatic voltage control circuit 1
The gate circuit 11 is controlled in the direction of lowering the output voltage of the inverter 4 to supply phase-advanced reactive power.
また、無効電力を制御してインバータ4の出力電流が増
加し、過電流設定器S2の設定値以上の過電流となった
ときは、過電流垂下特性回路8の出力信号が比較器eを
介して自動電圧制御回路10に人力され、該自動電圧制
御回路10の出力でゲート回路11を制御してインバー
タ4の出力電圧を下げ、過電流を制限する。In addition, when the output current of the inverter 4 increases by controlling the reactive power and the overcurrent exceeds the set value of the overcurrent setting device S2, the output signal of the overcurrent droop characteristic circuit 8 is outputted via the comparator e. The output of the automatic voltage control circuit 10 controls the gate circuit 11 to lower the output voltage of the inverter 4 and limit overcurrent.
D0発明が解決しようとする問題点
上記の制御装置によると、系統の電流位相が電圧位相4
二対して遅れ方向、即ち系統4二進相無効電力を供給す
る場合は調整機能を有するが、反対艦−系統に遅れ無効
電力を供給する場合の機能を有しない。従って負荷によ
っては進み電流に対しても過電流垂下特性機能を必要と
するが、これに対処することができないという問題があ
る。D0 Problems to be Solved by the Invention According to the above control device, the current phase of the system is voltage phase 4.
It has an adjustment function when supplying binary phase reactive power in the delayed direction relative to system 2, that is, system 4, but does not have a function when supplying delayed reactive power to the opposing ship system. Therefore, depending on the load, an overcurrent droop characteristic function is required even for leading current, but there is a problem that this cannot be dealt with.
E1問題点を解決するための手段
インバータの出力過電流を検出して設定値以上の過電流
になったとき相反する方向の2つの垂下特性信号を出力
する手段と、インバータの出力電流の出力電圧に対する
位相差を検出し、進み、遅れによって前記2つの信号を
選択的に自動電圧制御回に&を二人力する手段とを備え
る。Means for solving problem E1: means for detecting inverter output overcurrent and outputting two droop characteristic signals in opposite directions when the overcurrent exceeds a set value; and output voltage of inverter output current. means for detecting the phase difference between the two signals and selectively inputting the two signals to the automatic voltage control circuit by leading and delaying them.
28作用
進み電流か設定過電流値以上流れたときは函数発生器の
出力を増加させて、インバータの出力電圧を上昇させて
進み電流を減少させ、逆に遅れ電流が設定過電流値以上
に流れたときは、函数発生器の出力を減少させてインバ
ータの出力電圧を低温
下させ遅れ電流を減少させる。28 Action When the lead current flows in excess of the set overcurrent value, the output of the function generator is increased, the output voltage of the inverter is increased, and the lead current is decreased, and conversely, the lagging current flows in excess of the set overcurrent value. When this occurs, the output of the function generator is reduced to lower the output voltage of the inverter and reduce the delay current.
G、実施例
第1図は、本発明の一実施例を示す回路図で、第3図と
同−又は類似のものには同一符号を付して説明を省略す
る。しかして20は過電流垂下特性用函数発生器で、電
流検出器CTの出力と無効電力検出回路5の出力信号を
入力信号とし、その出力信号を比較器8を介して自動電
圧制御回路10に加える。G. Embodiment FIG. 1 is a circuit diagram showing an embodiment of the present invention. Components that are the same as or similar to those in FIG. 3 are given the same reference numerals and their explanation will be omitted. Reference numeral 20 denotes a function generator for overcurrent drooping characteristics, which takes the output of the current detector CT and the output signal of the reactive power detection circuit 5 as input signals, and sends the output signal to the automatic voltage control circuit 10 via the comparator 8. Add.
#f2図は第1図の過電流垂下特性用函数発生器20の
一実施例を示す回路図で、電流検出器CTの電流を過電
流設定器SRと比較し、設定値以上の過電流となったと
きに垂下出力信号Aと、それを反転した出力信号Bとを
出力する過電流検出増巾器21と、無効電力検出回路5
で検出された電流位相の進み、遅れによって作動する位
相検出コンバレー/ 22 ト、該コンパレータ22+
:!つて過電流検出増巾器21の出力信号Aと出力イδ
号Bとを選択的に比較器9(=出力するアナログスイッ
チ23.24及び反転回路25により構成されている。Figure #f2 is a circuit diagram showing an embodiment of the overcurrent droop characteristic function generator 20 in Figure 1, in which the current of the current detector CT is compared with the overcurrent setter SR, and the overcurrent exceeding the set value is detected. an overcurrent detection amplifier 21 that outputs a drooping output signal A and an output signal B obtained by inverting the drooping output signal A, and a reactive power detection circuit 5.
A phase detection comparator that operates based on the lead or lag of the current phase detected by the comparator 22+.
:! The output signal A of the overcurrent detection amplifier 21 and the output signal δ
It is composed of analog switches 23, 24 and an inverting circuit 25 that selectively output the signal B and the comparator 9 (= output).
いる。There is.
次に作用を説明する。インバータ4の出力電圧及び出力
電流の位相を無効電力検出回路5で検出し、その検出信
号が無効電力設定器S1と比較し、設定値以上となった
とき無効電力制御増幅器6で増巾して自動電圧制御回M
10を二人力することは従来と同じであるが、本発明で
は過電流垂下特性回路に代え上記の函数発生器20を新
た(;設けたことを特徴としている。従ってインバータ
4の出力電流が出力電圧に対して遅れている場合は無効
電力検出回路5の出力信号は(ト)の信号としているの
で、これが函数発生器20に人力されると第2図の位相
検出コンパレータ22は、°アナログスイッチ23を閉
路して過電流検出増巾器21の出力信号Aを比較器Sを
介して自動電圧制御回路10に人力する。この状態で電
流検出器CTの出力が、過電流設定器S20の設定値以
上となったときは、急故に出力信号を減じてインバータ
4の出力電圧を下げ、遅れ電流を減少させる。逆1:イ
ンパータ4の出力電#、が出力電圧に対して進んだ場合
は、無効電力検出回路5の出力信号は(ハ)の信号とな
シ、M2の位相検出コンパレータ22の日出力で反転回
路25が反転し、アナログスイッチ24を閉路して過電
流検出増巾器21の出力信号B IIを自動電圧制御回
路10に接続する。この状態で電流検出器CTの出力が
過電流設定器5t(lの設定値以上となつ九ときは、急
激に出力信号を増加させてインバータ4の出力電圧を上
昇させ進み電流を減少させる。Next, the effect will be explained. The phase of the output voltage and output current of the inverter 4 is detected by the reactive power detection circuit 5, and the detected signal is compared with the reactive power setter S1, and when it exceeds the set value, it is amplified by the reactive power control amplifier 6. Automatic voltage control times M
10 is done by two people as in the past, but the present invention is characterized in that the above-mentioned function generator 20 is newly provided in place of the overcurrent droop characteristic circuit. Therefore, the output current of the inverter 4 is If it lags behind the voltage, the output signal of the reactive power detection circuit 5 is the signal (G), so when this is manually input to the function generator 20, the phase detection comparator 22 in FIG. 23 is closed and the output signal A of the overcurrent detection amplifier 21 is input to the automatic voltage control circuit 10 via the comparator S. In this state, the output of the current detector CT is set to the overcurrent setting device S20. When the value exceeds the value, the output signal is suddenly reduced to lower the output voltage of the inverter 4 and reduce the lagging current.Reverse 1: If the output voltage of the inverter 4 advances with respect to the output voltage, The output signal of the reactive power detection circuit 5 is different from the signal (c), and the inversion circuit 25 is inverted by the output of the phase detection comparator 22 of M2, and the analog switch 24 is closed and the overcurrent detection amplifier 21 is inverted. The output signal B II is connected to the automatic voltage control circuit 10. In this state, when the output of the current detector CT exceeds the set value of the overcurrent setter 5t (l), the output signal is suddenly increased and the inverter The output voltage of 4 is increased and the lead current is decreased.
H0効果
以上のように、進み、遅れの両過電流C:対して画工機
能を持たせたので、保護範囲が拡大し、特に進み過電流
によって生じていた主回路の部品の損傷を完全に防止で
き・また、簡単な制御回路を追加することで目的が達成
できるので安価C:できる等の効果を奏する。H0 effect As mentioned above, since it has a painter's function for both leading and lagging overcurrent C, the protection range is expanded, and in particular, damage to main circuit components caused by leading overcurrent is completely prevented. In addition, since the objective can be achieved by adding a simple control circuit, it is inexpensive and has the effect of being C: Possible.
第1図は本発明の一実施例を示す回路図、第2は本発明
に使用される過電流垂下特性函数発生器の一実施を示す
回路図、第3図は、従来の無効電力制御回路である。
1・・・他電源、2・・・負荷、4・・・インバータ、
5・・・無効電力検出回路、6・・・無効電力制御増幅
器、10・・・自動電圧制御回路、11・・・ゲート回
路、20・・・過電流垂下特性用函数発生器、21・・
・過電流検出増巾器、22・・・位相検出コンパレータ
、52G・・・過電流設定器。Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing an implementation of an overcurrent droop characteristic function generator used in the present invention, and Fig. 3 is a conventional reactive power control circuit. It is. 1...Other power supply, 2...Load, 4...Inverter,
5... Reactive power detection circuit, 6... Reactive power control amplifier, 10... Automatic voltage control circuit, 11... Gate circuit, 20... Function generator for overcurrent droop characteristic, 21...
- Overcurrent detection amplifier, 22... Phase detection comparator, 52G... Overcurrent setting device.
Claims (1)
圧と出力電流の位相を検出し、この位相差が設定値以上
になったときに自動電圧制御回路により前記インバータ
の出力電圧を制御して位相差を設定値以内に制御するよ
うにしたものにおいて、前記インバータの出力電流を検
出してこの検出電流が過電流設定値以上になったときに
急激に減じる出力信号Aと、反対に増加する出力信号B
の2つの信号を発生する手段と、前記インバータの出力
電流が出力電圧に対して進み又は遅れを検出し、進みの
ときに前記出力信号Bを、また遅れのときは出力信号A
をそれぞれ前記自動電圧制御回路に入力する手段とを備
えたことを特徴とする無効電力制御装置。The inverter is operated in conjunction with another power source, the phase of the inverter's output voltage and output current is detected, and when this phase difference exceeds a set value, the automatic voltage control circuit controls the output voltage of the inverter to detect the phase difference. is controlled within a set value, when the output current of the inverter is detected and this detected current exceeds the overcurrent set value, an output signal A that suddenly decreases, and an output signal that increases conversely. B
means for generating two signals; and means for detecting whether the output current of the inverter leads or lags the output voltage, and outputs the output signal B when the output current is a lead, and outputs the output signal A when the output current is a lag.
A reactive power control device comprising: means for inputting each of the voltages into the automatic voltage control circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61294297A JPH0743616B2 (en) | 1986-12-10 | 1986-12-10 | Reactive power controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61294297A JPH0743616B2 (en) | 1986-12-10 | 1986-12-10 | Reactive power controller |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63146113A true JPS63146113A (en) | 1988-06-18 |
JPH0743616B2 JPH0743616B2 (en) | 1995-05-15 |
Family
ID=17805873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61294297A Expired - Lifetime JPH0743616B2 (en) | 1986-12-10 | 1986-12-10 | Reactive power controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0743616B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017158358A (en) * | 2016-03-03 | 2017-09-07 | 富士電機株式会社 | Ac power source device and control method for the same |
-
1986
- 1986-12-10 JP JP61294297A patent/JPH0743616B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017158358A (en) * | 2016-03-03 | 2017-09-07 | 富士電機株式会社 | Ac power source device and control method for the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0743616B2 (en) | 1995-05-15 |
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