JPH01174298A - Operation of induction generator - Google Patents
Operation of induction generatorInfo
- Publication number
- JPH01174298A JPH01174298A JP62328877A JP32887787A JPH01174298A JP H01174298 A JPH01174298 A JP H01174298A JP 62328877 A JP62328877 A JP 62328877A JP 32887787 A JP32887787 A JP 32887787A JP H01174298 A JPH01174298 A JP H01174298A
- Authority
- JP
- Japan
- Prior art keywords
- induction generator
- voltage
- frequency
- capacitor
- excitation
- 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.)
- Pending
Links
- 230000006698 induction Effects 0.000 title claims abstract description 44
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は誘導発電機の運転方法に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a method of operating an induction generator.
（従来の技術）
誘導発電機は同期発電機と異なり励磁装置をもっていな
いため、その運転には（１）他の電源と並列して励磁を
受けるか、又は（２〉自己励磁現象を起すに十分な容量
のコンデンサを端子に並列に接続していわゆる自己励磁
誘導発電機の状態にすることが必要である。(Prior art) Unlike a synchronous generator, an induction generator does not have an excitation device, so its operation requires either (1) receiving excitation in parallel with another power source, or (2) a device sufficient to cause self-excitation. It is necessary to connect a capacitor with a certain capacity in parallel to the terminals to create a so-called self-exciting induction generator.
（発明が解決しようとする問題点）
上記したように、誘導発電機は他の電源と並列して運転
されるため、もし電源側の事故で誘導発電機が電源と切
シ離されて単独運転になると、運転不能に陥いシ停止し
てしまう。(Problem to be solved by the invention) As mentioned above, the induction generator is operated in parallel with other power sources, so if an accident on the power supply side causes the induction generator to be disconnected from the power source and operate independently. When this happens, the machine becomes inoperable and comes to a halt.
本発明は上記事情に鑑みてなされたものであり、電源側
の事故で電源から切シ離されて単独運転になった場合で
あっても、継続して、しかも安定にある規定の電圧と周
波数を維持しつつ、負荷に電力を供給することの可能表
誘導発電機の運転方法を提供することを目的としている
。The present invention has been made in view of the above circumstances, and even if the power supply is disconnected from the power supply due to an accident and becomes isolated, it can continue to operate at a specified voltage and frequency that is stable. The purpose of the present invention is to provide a method of operating an induction generator that can supply power to a load while maintaining
（問題点を解決するための手段）
本発明では誘導発電機の端子にはし中断器を介して自己
励磁現象を発生させるためのコンデンサを接続し、この
誘導発電機が事故によって単独運転になりた場合に、調
速装置によって周波数がほぼ一定値となるように制御す
ると共に、前記コンデンサの容量を調節することによっ
て電圧を制御するように構成した。(Means for Solving the Problems) In the present invention, a capacitor for generating a self-excitation phenomenon is connected to the terminal of an induction generator via a circuit interrupter. In this case, the frequency is controlled to a substantially constant value by the speed governor, and the voltage is controlled by adjusting the capacitance of the capacitor.
（作用）
事故によってし中断器が開放され誘導発電機が単独にな
った場合は、直ちに自己励磁現象を発生するに足るコン
デンサを投入する。周波数はその設定値との差を検出し
て１の周波数差を補償するよう制御し、更に電圧はその
設定値との差を検出して自己励磁発生用コンデンサを制
御する。(Operation) If the interrupter is opened due to an accident and the induction generator is left alone, immediately add a capacitor sufficient to generate a self-excitation phenomenon. The frequency is controlled to compensate for a frequency difference of 1 by detecting the difference with the set value, and the voltage is controlled by detecting the difference with the set value to control the self-excitation generating capacitor.
（実施例） 以下図面を参照して実施例を説明する。(Example) Examples will be described below with reference to the drawings.
第１図は本発明による誘導発電機の運転方法を説明する
ための一実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment for explaining the method of operating an induction generator according to the present invention.
図において、１は誘導発電機、２はタービン、３は加減
弁、４は主止め弁、５は調速装置である。In the figure, 1 is an induction generator, 2 is a turbine, 3 is a control valve, 4 is a main stop valve, and 5 is a speed governor.
誘導発電機１の端子には負荷６、力率改善用コンデンサ
７が接続され、し中断器８を介して電力系統などの他の
電源９に接続されている。A load 6 and a power factor correction capacitor 7 are connected to the terminals of the induction generator 1, and the induction generator 1 is connected to another power source 9 such as a power system via an interrupter 8.
第１図において誘導発電機１は通常、他の電源９と並列
して運転されるが、この場合タービン２は調速装置の一
部に設けられた負荷制限器によシ、加減弁３の開度が任
意の開度以上に開かないように制限する、いわゆるロー
ドリミ、り運転が行なわれる。In Fig. 1, an induction generator 1 is normally operated in parallel with another power source 9, but in this case, a turbine 2 is operated by a load limiter provided as a part of a speed governor, and a regulator valve 3 is operated. A so-called load limit operation is performed in which the opening degree is limited so that it does not open more than an arbitrary opening degree.
即ち、誘導発電機ｌの出カ一定運転である。誘導発電機
１の周波数は勿論、電源９０周波数で決まるし電圧は負
荷６、力率改善用コンデンサ７、電源９及び誘導発電機
自身の特性によって一義的に決定される。ここで電源９
の事故などＫよシし中断器８が開放されると、誘導発電
機ｌは単独になるため、電圧は次第に下降して回転数は
上昇して行き、ついには第１図には図示していない非常
用調速機によりて主止め弁４を閉じてタービン２を停止
させるに至る。That is, the induction generator 1 is operated at a constant output. The frequency of the induction generator 1 is of course determined by the frequency of the power source 90, and the voltage is uniquely determined by the characteristics of the load 6, the power factor correction capacitor 7, the power source 9, and the induction generator itself. Here power supply 9
When the interrupter 8 is opened due to an accident such as K, the induction generator 1 becomes independent, so the voltage gradually decreases and the rotation speed increases, until finally, as shown in Fig. 1, the induction generator 1 becomes independent. The main stop valve 4 is closed by the emergency governor, which is not installed, and the turbine 2 is stopped.
本発明は以上に述べた従来の装置に対して新たに１Ｌヤ
断器１０と自己励磁現象発生用コンデンサ１１、並びに
周波数及び電圧を制御するために電圧変成器１２、周波
数検出器１３周波数設定器１４、周波数比較器１５、電
圧検出器１６、電圧設定器１７、電圧比較器１８、電圧
調整装置１９を設けたものである。The present invention adds a 1L disconnector 10, a self-excitation phenomenon generation capacitor 11, a voltage transformer 12, a frequency detector 13 and a frequency setter to control the frequency and voltage to the conventional device described above. 14, a frequency comparator 15, a voltage detector 16, a voltage setter 17, a voltage comparator 18, and a voltage regulator 19.
ここで上記実施例の作用について説明する前に、誘導発
電機の自己励磁現象発生の条件式について説明する。第
２図に示すように、誘導発電機（ＩＧ）の端子に例えば
抵抗負荷（ＲＬ ）とコンデンサ（Ｙｃ ）が接続され
ている場合の自己励磁現象発生の条件式は、次式で与え
られる。但し、説明を簡単にするため、誘導発電機（Ｉ
Ｇ ）の周波数は定格に保たれていると仮定している。Before explaining the operation of the above embodiment, the conditional expression for the occurrence of the self-excitation phenomenon in the induction generator will be explained. As shown in FIG. 2, when, for example, a resistive load (RL) and a capacitor (Yc) are connected to the terminals of the induction generator (IG), the conditional expression for the occurrence of the self-excitation phenomenon is given by the following equation. However, to simplify the explanation, an induction generator (I
It is assumed that the frequency of G) is kept at the rated value.
但し、
ＲＬ：負荷の抵抗
Ｙｃ：並列コンデンサのアドミタンス
Ｘ ：誘導発電機の固定子自己リアクタンスＸ／：誘導
発電機の過渡りアクタンス
である。However, RL: resistance of load Yc: admittance of parallel capacitor X: stator self-reactance of induction generator X/: transient actance of induction generator.
上記（１）式は第３図に示すように、半円の内部（斜線
部分）を表わしている。即ち、例えばＲ１，１の抵抗を
もつ負荷が接続される場合には（負荷の関係がある）Ｙ
ｃがＹｏｌ ｍｉｎ （Ｙｃ＜Ｙｃ１ｒｎ＊ｘの条件を
満足していれば自己励磁現象が発生するを示している。As shown in FIG. 3, the above equation (1) represents the inside of a semicircle (the shaded area). That is, for example, when a load with a resistance of R1,1 is connected (load relationship), Y
This indicates that a self-excitation phenomenon occurs if c satisfies the condition Yol min (Yc<Yc1rn*x).
再び第１図に戻って実施例の作用について説明する。第
１図において、電源９の事故などによシし中断器８が開
放され誘導発電機１が単独になった場合、直ちにし中断
器１０が投入され、第３図で説明したように、自己励磁
現象を発生するに足るＹＣｌ ｍｉｎ以上の容量のコン
デンサ１１が接続される。誘導発電機ｌの周波数は電圧
変成器１２で測定された端子電圧を周波数検出器１３に
入力することによシ検出され、この検出された周波数と
周波数設定器１４の設定値は周波数比較器１５で比較さ
れ、その誤差が調速装置５に入力され、その出力により
加減弁３を調節することによって、誘導発電機１の周波
数が制御される。一方、誘導発電機１の電圧は電圧検出
器１６で検出され、この検出された電圧と電圧設定器１
７の設定値は電圧比較器１８で比較され、その誤差が電
圧調整装置１９に入力されてその出力によシ自己励磁発
生用コンデンサ１１を調節することによシ誘導発電機１
の電圧が制御される。Returning to FIG. 1 again, the operation of the embodiment will be explained. In FIG. 1, when the interrupter 8 is opened due to an accident in the power supply 9 and the induction generator 1 becomes independent, the interrupter 10 is immediately turned on and the interrupter 10 is turned on, as explained in FIG. A capacitor 11 having a capacity of YCl min or more, which is sufficient to generate an excitation phenomenon, is connected. The frequency of the induction generator l is detected by inputting the terminal voltage measured by the voltage transformer 12 to the frequency detector 13, and the detected frequency and the setting value of the frequency setter 14 are input to the frequency comparator 15. The error is input to the speed governor 5, and the frequency of the induction generator 1 is controlled by adjusting the regulating valve 3 based on the output thereof. On the other hand, the voltage of the induction generator 1 is detected by the voltage detector 16, and this detected voltage and the voltage setting device 1
The set values of 7 are compared by a voltage comparator 18, and the error is inputted to a voltage regulator 19, which adjusts the self-excitation generation capacitor 11 according to its output, thereby increasing the induction generator 1.
voltage is controlled.
以上説明したように、本発明によれば誘導発電機が単独
になった場合においても、規定の周波数と電圧をもつ電
力を負荷に対して安定にしかも継続して供給することが
出来ると共に、エネルギー（タービンの駆動には誘導発
電機の運転が停止すると廃棄される種類のエネルギーが
利用されるととが多い）の有効活用にも寄与する。なお
本発明は最初から電源のない誘導発電機単独の場合にも
適用できることは明らかである。As explained above, according to the present invention, even when an induction generator is used alone, it is possible to stably and continuously supply power with a specified frequency and voltage to the load, and also to provide energy. (In many cases, the type of energy that would be wasted when the induction generator stops operating is used to drive the turbine.) It also contributes to the effective use of energy. It is clear that the present invention can also be applied to a case where an induction generator is used alone without a power source from the beginning.
第１図は本発明による誘導発電機の運転方法を説明する
ための一実施例の構成図、第２図は誘導発電機の自己励
磁現象を説明するための図、第３図は自己励磁現象発生
の条件を示す図である。
１・・・誘導発電機 ２・・・タービン３・・・加
減弁 ４・・・主止め弁５・・・調速装置
６・・・負荷７・・・力率改善用コンデンサ
８・・・しゃ断器 ９・・・電源１０・・・し中
断器
１１・・・自己励磁発生用コンデンサ
１２・・・電圧変成器 １３・・・周波数検出器１４
・・・周波数設定器 １５・・・周波数比較器１６・・
・電圧検出器 １７・・・電圧設定器１８・・・電圧
比較器 １９・・・電圧調整装置特許出願人 株式
会社 東 芝Figure 1 is a configuration diagram of an embodiment for explaining the method of operating an induction generator according to the present invention, Figure 2 is a diagram for explaining the self-excitation phenomenon of the induction generator, and Figure 3 is a diagram for explaining the self-excitation phenomenon. FIG. 3 is a diagram showing conditions for occurrence. 1... Induction generator 2... Turbine 3... Control valve 4... Main stop valve 5... Speed governor
6... Load 7... Power factor correction capacitor 8... Breaker 9... Power supply 10... Interrupter 11... Capacitor for self-excitation generation 12... Voltage transformer 13. ...Frequency detector 14
...Frequency setter 15...Frequency comparator 16...
・Voltage detector 17... Voltage setting device 18... Voltage comparator 19... Voltage regulator patent applicant Toshiba Corporation
Claims (1)
運転方法において、前記誘導発電機の端子には、しゃ断
器を介して自己励磁現象を発生させるためのコンデンサ
を接続し、前記誘導発電機が事故によって単独運転にな
った場合に、調速装置によって周波数をほぼ一定値に制
御すると共に、前記コンデンサの容量を調節することに
よって電圧を制御することを特徴とする誘導発電機の運
転方法。In a method for operating an induction generator connected in parallel with a power source for excitation, a capacitor for generating a self-excitation phenomenon is connected to the terminal of the induction generator via a breaker, and the induction generator is operated in parallel with a power source for excitation. Operation of an induction generator, characterized in that when the generator is in isolated operation due to an accident, the frequency is controlled to a substantially constant value by a speed governor, and the voltage is controlled by adjusting the capacity of the capacitor. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328877A JPH01174298A (en) | 1987-12-25 | 1987-12-25 | Operation of induction generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328877A JPH01174298A (en) | 1987-12-25 | 1987-12-25 | Operation of induction generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01174298A true JPH01174298A (en) | 1989-07-10 |
Family
ID=18215095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62328877A Pending JPH01174298A (en) | 1987-12-25 | 1987-12-25 | Operation of induction generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01174298A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2075905A1 (en) * | 2007-12-28 | 2009-07-01 | Vestas Wind Systems A/S | Method and system for maintaining magnetisation of a wind turbine generator during power grid faults |
-
1987
- 1987-12-25 JP JP62328877A patent/JPH01174298A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2075905A1 (en) * | 2007-12-28 | 2009-07-01 | Vestas Wind Systems A/S | Method and system for maintaining magnetisation of a wind turbine generator during power grid faults |
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