JPH0347524B2 - - Google Patents
Info
- Publication number
- JPH0347524B2 JPH0347524B2 JP59217260A JP21726084A JPH0347524B2 JP H0347524 B2 JPH0347524 B2 JP H0347524B2 JP 59217260 A JP59217260 A JP 59217260A JP 21726084 A JP21726084 A JP 21726084A JP H0347524 B2 JPH0347524 B2 JP H0347524B2
- Authority
- JP
- Japan
- Prior art keywords
- reactive power
- power
- output
- generator
- target value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は発電機の力率を制御する自動力率制御
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic power factor control device for controlling the power factor of a generator.
［従来の技術］
発電機を並列運転する場合には発電機の自動力
率制御が不可欠であるが、従来無負荷および軽負
荷時において安定した自動力率制御を行なうこと
が困難であつた。その原因として、発電機の同期
化力の不足、原動機出力の不安定性および力率検
出器の負荷依存性が挙げられる。そこで従来は、
発電機の出力が所定の値に達した後に自動力率制
御を行なう方式がとられていた。[Prior Art] When operating generators in parallel, automatic power factor control of the generators is essential, but conventionally it has been difficult to perform stable automatic power factor control during no-load and light-load conditions. The causes include insufficient synchronization power of the generator, instability of the prime mover output, and load dependence of the power factor detector. Therefore, conventionally,
A method was adopted in which automatic power factor control was performed after the output of the generator reached a predetermined value.
［発明が解決しようとする課題］
しかしながら上記の従来の方式では、発電機の
出力が所定の値に達するまでの間、オペレータに
よる発電機界磁電流の調整操作が必要となるこ
と、および自動力率制御への切替点を検出するた
めの電力検出器が必要となること等の問題点があ
つた。[Problems to be Solved by the Invention] However, with the above-mentioned conventional method, the operator is required to adjust the generator field current until the generator output reaches a predetermined value, and automatic power generation is required. There were problems such as the need for a power detector to detect the switching point to rate control.
本発明の目的は、起動時および停止時を含めて
無負荷および軽負荷時における同期化力を確保し
た発電機の安定運転を実現できる自動力率制御装
置を、簡単な回路構成で提供することにある。 An object of the present invention is to provide an automatic power factor control device with a simple circuit configuration that can realize stable operation of a generator by ensuring synchronization power during no-load and light-load conditions, including when starting and stopping. It is in.
［課題を解決するための手段］
本発明の自動力率制御装置は、同期発電機の無
効電力の出力を検出する無効電力検出器と、前記
無効電力検出器より入力して、運転開始時には、
発電機の同期投入後に発電機の有効電力の出力が
０の状態で、発電機の無効電力の出力を、予め内
部に設定された無効電力制御目標値に達するまで
増加させ、無効電力の出力が該無効電力制御目標
値に達した後は無効電力の出力を保持させて、発
電機の運転停止時に同期投入解除とともにリセツ
トされる無効電力制御手段と、前記発電機の無効
電力の出力が、予め内部に設定された前記無効電
力目標値より小さいとき、または無効電力の出力
が前記無効電力目標値に等しく、かつ力率が予め
設定された力率制御目標値以下のときに前記無効
電力制御手段を選択し、無効電力の出力が前記無
効電力目標値より大きいとき、または無効電力の
出力が前記無効電力目標値に等しく、かつ力率が
前記力率制御目標値より大きいときに前記力率制
御手段を選択して、それぞれを発電機界磁の自動
電圧調整器に接続する切替手段とを有している。[Means for Solving the Problems] The automatic power factor control device of the present invention includes a reactive power detector that detects the output of reactive power of a synchronous generator, and an input from the reactive power detector, and at the time of starting operation,
After the generator is synchronized and the active power output of the generator is 0, the reactive power output of the generator is increased until it reaches the reactive power control target value set internally in advance, and the reactive power output is increased. A reactive power control means holds the reactive power output after reaching the reactive power control target value, and is reset when synchronization is released when the generator is stopped, and the reactive power output of the generator is controlled in advance. When the reactive power output is smaller than the internally set reactive power target value, or when the reactive power output is equal to the reactive power target value and the power factor is less than or equal to a preset power factor control target value, the reactive power control means and when the reactive power output is greater than the reactive power target value, or when the reactive power output is equal to the reactive power target value and the power factor is greater than the power factor control target value, the power factor control is performed. and switching means for selecting the means and connecting each means to an automatic voltage regulator of the generator field.
［実施例］
本発明の実施例について図面を参照して説明す
る。[Example] An example of the present invention will be described with reference to the drawings.
第１図は本発明の自動力率制御装置の一実施例
を示す構成図である。力率検出器１および無効電
力検出器２はそれぞれ発電機８の出力の力率PF、
無効電力分QGを検出する。無効電力制御器３は
発電機８の同期投入後に自動電圧調整器９を制御
して、予め内部に設定された無効電力制御目標値
QSに達するまで無効電力QGを増加させ、無効電
力QGが無効電力制御目標値QSに達した後、この
目標値に保持させて、発電機の同期投入解除後に
リセツトされる。力率制御器５は力率PFが力率
制御目標値OAを保つように自動電圧調整器９を
制御する。制御モード切替回路４は、無効電力検
出器２で検出された無効電力QGが無効電力制御
目標値QSより小さいとき、および無効電力QGが
無効電力制御目標値QSに等しくかつ力率PFが力
率制御目標値OA以下のときにはローレベルの制
御信号Ｃを出力し、無効電力QGが無効電力制御
目標値QSより大きいとき、および無効電力QGが
無効電力制御目標値QSに等しくかつ力率PFが力
率制御目標値OAより大きいときにはハイレベル
の制御信号Ｃを出力する。アナログスイツチ６は
制御モード切替回路４から出力された制御信号Ｃ
がローレベルのときには無効電力制御器３の出力
を自動電圧調整器９に接続し、ハイレベルのとき
には力率制御器５の出力を自動電圧調整器９に接
続する。停止スイツチ７は無効電力制御器３およ
び力率制御器５による自動電圧調整器９の制御を
停止させるスイツチであり、不図示の同期投入完
了信号によつて解除される。自動電圧調整器９は
発電機８の界磁電流を調整する。 FIG. 1 is a block diagram showing an embodiment of an automatic power factor control device of the present invention. The power factor detector 1 and the reactive power detector 2 each have a power factor PF of the output of the generator 8,
Detect reactive power QG. After the generator 8 is synchronized, the reactive power controller 3 controls the automatic voltage regulator 9 to adjust the reactive power control target value set internally in advance.
The reactive power QG is increased until it reaches QS, and after the reactive power QG reaches the reactive power control target value QS, it is held at this target value and reset after the synchronization of the generator is released. The power factor controller 5 controls the automatic voltage regulator 9 so that the power factor PF is maintained at the power factor control target value OA. The control mode switching circuit 4 operates when the reactive power QG detected by the reactive power detector 2 is smaller than the reactive power control target value QS, and when the reactive power QG is equal to the reactive power control target value QS and the power factor PF is When the control target value OA is below, a low level control signal C is output, and when the reactive power QG is greater than the reactive power control target value QS, and when the reactive power QG is equal to the reactive power control target value QS and the power factor PF is When the rate control target value OA is greater than the rate control target value OA, a high level control signal C is output. The analog switch 6 receives the control signal C output from the control mode switching circuit 4.
When is at a low level, the output of the reactive power controller 3 is connected to the automatic voltage regulator 9, and when is at a high level, the output of the power factor controller 5 is connected to the automatic voltage regulator 9. The stop switch 7 is a switch that stops the control of the automatic voltage regulator 9 by the reactive power controller 3 and the power factor controller 5, and is released by a synchronization completion signal (not shown). Automatic voltage regulator 9 regulates the field current of generator 8.
次に第２図のキヤパビリテイカーブを参照して
本実施例の動作を説明する。 Next, the operation of this embodiment will be explained with reference to the capability curve shown in FIG.
まず発電機８を母線と並列運転させるために、
発電機８の端子電圧を調整し、その後位相合わせ
を行ない同期投入すると、不図示の制御部から出
力される同期投入完了信号によつて停止スイツチ
７が解除される。初期状態（点０）では無効電力
検出器２で検出される無効電力QGは０であるの
で、制御モード切替回路４からローレベルの制御
信号Ｃがアナログスイツチ６に出力され、無効電
力制御器３により自動電圧調整器９が制御され
て、発電機８の出力する無効電力QGが増加され
る。無効電力QGが無効電力制御目標値QS（点
Q1）に達すると、無効電力QGの増加は停止さ
れ、そのまま保持される。次にガバナーにより発
電機８の有効電力PGの出力が増加される。有効
電力PGの増加に伴つて力率PFは遅れ側から進み
方向へと移行し、力率PFが予め設定された力率
制御目標値OA（点P2）を越えると、制御モード
切替回路４からハイレベルの制御信号Ｃがアナロ
グスイツチ６に出力されるので、自動電圧調整器
９が力率制御器５によつて制御され（点P1）、有
効電力PGの増加が停止されて力率PFが力率制御
目標値OAに保たれる（点Q2）。 First, in order to operate the generator 8 in parallel with the bus bar,
When the terminal voltage of the generator 8 is adjusted, the phases are adjusted, and the synchronization is turned on, the stop switch 7 is released by a synchronization completion signal outputted from a control section (not shown). In the initial state (point 0), the reactive power QG detected by the reactive power detector 2 is 0, so the control mode switching circuit 4 outputs the low level control signal C to the analog switch 6, and the reactive power controller 3 The automatic voltage regulator 9 is controlled, and the reactive power QG output from the generator 8 is increased. Reactive power QG is the reactive power control target value QS (point
When Q 1 ) is reached, the increase in reactive power QG is stopped and kept unchanged. Next, the output of the active power PG of the generator 8 is increased by the governor. As the active power PG increases, the power factor PF shifts from the lagging side to the advancing direction, and when the power factor PF exceeds the preset power factor control target value OA (point P 2 ), the control mode switching circuit 4 Since a high level control signal C is output to the analog switch 6, the automatic voltage regulator 9 is controlled by the power factor controller 5 (point P 1 ), and the increase in active power PG is stopped and the power factor is adjusted. PF is maintained at the power factor control target value OA (point Q 2 ).
この後、不図示の自動負荷取り装置等により負
荷が定格負荷にされて発電機８の駆動が続行され
る。さらに運転終了時においては発電機負荷が再
び軽負荷となり、無効電力検出器２で検出された
無効電力QGが無効電力制御目標値QS（点P2）に
達するまで、力率PFは力率制御器５および自動
電圧調整器９に制御されて力率制御目標値OAに
保たれる。無効電力QGが発電機８の負荷ととも
に減少して無効電力制御目標値QSに達し（点
P2）、さらに負荷が減少すると、制御モード切替
回路４からローレベルの制御信号Ｃがアナログス
イツチ６に出力されて、再び無効電力制御器３に
よる自動電圧調整器９の制御が開始される。すな
わち、有効電力PGが０になるまで減少された後
も（点Q1）、無効電力QGがQSとなるよう制御を
継続する。最後に、不図示の制御部から出力され
る停止信号によつて停止スイツチ７が投入され、
無効電力制御器３がリセツトされて制御が終了す
る。 Thereafter, the load is set to the rated load by an automatic load taking device (not shown), and the generator 8 continues to be driven. Furthermore, at the end of operation, the generator load becomes light again, and the power factor PF remains under power factor control until the reactive power QG detected by the reactive power detector 2 reaches the reactive power control target value QS (point P 2 ). 5 and automatic voltage regulator 9 to maintain the power factor control target value OA. The reactive power QG decreases with the load of the generator 8 and reaches the reactive power control target value QS (point
P 2 ), when the load further decreases, the control mode switching circuit 4 outputs a low-level control signal C to the analog switch 6, and the reactive power controller 3 starts controlling the automatic voltage regulator 9 again. That is, even after the active power PG is reduced to 0 (point Q 1 ), control is continued so that the reactive power QG becomes QS. Finally, the stop switch 7 is turned on by a stop signal output from a control section (not shown).
The reactive power controller 3 is reset and the control ends.
［発明の効果］
以上説明したように本発明による無効電力制御
手段と切替手段を用いることにより、無負荷およ
び軽負荷領域においても自動的に同期化力を確保
した発電機の安定運転が維持出来ると共に、従来
方式のような電力検出器を要しない簡単な回路構
成の自動力率制御装置を実現出来るという効果が
ある。[Effects of the Invention] As explained above, by using the reactive power control means and switching means according to the present invention, it is possible to maintain stable operation of the generator with automatic synchronization power ensured even in no-load and light-load regions. In addition, there is an effect that an automatic power factor control device with a simple circuit configuration that does not require a power detector like the conventional system can be realized.
第１図は本発明の一実施例に係る自動力率制御
装置の構成図、第２図は第１図の実施例の動作を
示すキヤパビリテイカーブである。
１……力率検出器、２……無効電力検出器、３
……無効電力制御器、４……制御モード切替回
路、５……力率制御器、６……アナログスイツ
チ、７……停止スイツチ、８……発電機、９……
自動電圧調整器、PG……有効電力、QG……無効
電力、QS……無効電力制御目標値、OA……力率
制御目標値。
FIG. 1 is a block diagram of an automatic power factor control device according to an embodiment of the present invention, and FIG. 2 is a capability curve showing the operation of the embodiment of FIG. 1...Power factor detector, 2...Reactive power detector, 3
... Reactive power controller, 4 ... Control mode switching circuit, 5 ... Power factor controller, 6 ... Analog switch, 7 ... Stop switch, 8 ... Generator, 9 ...
Automatic voltage regulator, PG...active power, QG...reactive power, QS...reactive power control target value, OA...power factor control target value.
Claims (1)
御する力率制御手段を有する自動力率制御装置に
おいて、 前記発電機の無効電力の出力を検出する無効電
力検出器と、 前記無効電力検出器より入力して、運転開始時
には、発電機の同期投入後に発電機の有効電力の
出力が０の状態で、発電機の無効電力の出力を、
予め内部に設定された無効電力制御目標値に達す
るまで増加させ、無効電力の出力が該無効電力制
御目標値に達した後は無効電力の出力を保持させ
て、発電機の運転停止時に同期投入解除とともに
リセツトされる無効電力制御手段と、 前記発電機の無効電力の出力が、予め内部に設
定された前記無効電力目標値より小さいとき、ま
たは無効電力の出力が前記無効電力目標値に等し
く、かつ力率が予め設定された力率制御目標値以
下のときに前記無効電力制御手段を選択し、無効
電力の出力が前記無効電力目標値より大きいと
き、または無効電力の出力が前記無効電力目標値
に等しく、かつ力率が前記力率制御目標値より大
きいときに前記力率制御手段を選択して、それぞ
れを発電機界磁の自動電圧調整器に接続する切替
手段とを有することを特徴とする自動力率制御装
置。[Scope of Claims] 1. An automatic power factor control device having a power factor control means for controlling the power factor of the output of a synchronous generator by field control, comprising: a reactive power detector for detecting the output of reactive power of the generator; Input from the reactive power detector, at the start of operation, the output of the reactive power of the generator is in the state where the output of the active power of the generator is 0 after synchronization of the generator,
The reactive power output is increased until it reaches the reactive power control target value set internally in advance, and after the reactive power output reaches the reactive power control target value, the reactive power output is maintained, and the synchronization is turned on when the generator stops operating. reactive power control means that is reset upon release; when the reactive power output of the generator is smaller than the reactive power target value set internally in advance, or when the reactive power output is equal to the reactive power target value; and the reactive power control means is selected when the power factor is less than or equal to a preset power factor control target value, and when the reactive power output is greater than the reactive power target value, or when the reactive power output is less than the reactive power target and switching means for selecting the power factor control means and connecting each of them to an automatic voltage regulator of the generator field when the power factor is equal to the value and the power factor is greater than the power factor control target value. Automatic power factor control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21726084A JPS6197722A (en) | 1984-10-18 | 1984-10-18 | Automatic power factor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21726084A JPS6197722A (en) | 1984-10-18 | 1984-10-18 | Automatic power factor controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6197722A JPS6197722A (en) | 1986-05-16 |
| JPH0347524B2 true JPH0347524B2 (en) | 1991-07-19 |
Family
ID=16701354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21726084A Granted JPS6197722A (en) | 1984-10-18 | 1984-10-18 | Automatic power factor controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6197722A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6823797B2 (en) * | 2016-08-04 | 2021-02-03 | 中国電力株式会社 | Operation control system and program for isolated power plants |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5681043A (en) * | 1979-11-30 | 1981-07-02 | Omron Tateisi Electronics Co | Power factor relay |
| JPS573528A (en) * | 1980-06-09 | 1982-01-09 | Mitsubishi Electric Corp | Power factor controller |
| JPS5725125A (en) * | 1980-06-09 | 1982-02-09 | Mitsubishi Electric Corp | Ractive power regulator |
| JPS57132735A (en) * | 1981-02-09 | 1982-08-17 | Nissin Electric Co Ltd | Condenser sequence controller |
| JPS58170324A (en) * | 1982-03-30 | 1983-10-06 | 株式会社東芝 | Power factor controlling method |
| JPS59103527A (en) * | 1982-12-06 | 1984-06-15 | 株式会社 伸和技研 | Switching method and device for power factor regulator |
-
1984
- 1984-10-18 JP JP21726084A patent/JPS6197722A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5681043A (en) * | 1979-11-30 | 1981-07-02 | Omron Tateisi Electronics Co | Power factor relay |
| JPS573528A (en) * | 1980-06-09 | 1982-01-09 | Mitsubishi Electric Corp | Power factor controller |
| JPS5725125A (en) * | 1980-06-09 | 1982-02-09 | Mitsubishi Electric Corp | Ractive power regulator |
| JPS57132735A (en) * | 1981-02-09 | 1982-08-17 | Nissin Electric Co Ltd | Condenser sequence controller |
| JPS58170324A (en) * | 1982-03-30 | 1983-10-06 | 株式会社東芝 | Power factor controlling method |
| JPS59103527A (en) * | 1982-12-06 | 1984-06-15 | 株式会社 伸和技研 | Switching method and device for power factor regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6197722A (en) | 1986-05-16 |
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