JPH02155500A - Control method of ac excited synchronous machine - Google Patents
Control method of ac excited synchronous machineInfo
- Publication number
- JPH02155500A JPH02155500A JP63307875A JP30787588A JPH02155500A JP H02155500 A JPH02155500 A JP H02155500A JP 63307875 A JP63307875 A JP 63307875A JP 30787588 A JP30787588 A JP 30787588A JP H02155500 A JPH02155500 A JP H02155500A
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- Prior art keywords
- aesm
- excited synchronous
- voltage
- synchronous machine
- slip
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 13
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 230000006698 induction Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000002950 deficient Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 101100313164 Caenorhabditis elegans sea-1 gene Proteins 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は例えば揚水発電所において、ポンプ水車に直
結された交流励磁同期機の制御方法、特に、揚水運転時
のＡＦＣ調整幅を増大させた可変速揚水発電所の系統事
故後の再運転に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a control method for an AC excited synchronous machine directly connected to a pump-turbine in, for example, a pumped storage power plant, and in particular, a control method for increasing the AFC adjustment width during pumped storage operation. This concerns the re-operation of a variable speed pumped storage power plant after a system accident.
最近の電力系統は原子力の比率の増大および火力のプー
リースタートストップ回数の増大に伴い、深夜帯のＡＦ
−Ｃ調整容量が不足し、この対応として揚水発電所の入
力調整が必要になってきた。Recently, electric power systems have increased the proportion of nuclear power and the number of pulley start-stops for thermal power plants has increased.
-C adjustment capacity is insufficient, and as a countermeasure, it has become necessary to adjust the input of pumped storage power plants.
第６図はポンプ水車に直結された従来の交流励磁同期機
の制御方法を示すブロック図であり、第６図において、
１は交流励磁同期機（以下、ＡＥＳＭと称す）の電機子
、２はＡＥＳＭＩの回転子（２次コイル）、３は回転子
２とシャフト４を介して直結された可逆式のポンプ水車
、５はＡＥＳＭｌの出力電圧を変成する励磁変換器用変
圧器、６は回転子と励磁変換器用変圧器５との間に接続
されたサイクロコンバータ、７は回転子２の回転数検出
器、８は可変速制御器、９はＡＥＳＭｌの出力電流を検
出する変流器、１０はＡＥＳＭＩの出力電圧を検出する
計器用変圧器、１１は変流器９の出力と計器用変圧器１
０の出力を入力とする電力変換器、１２はＡＥＳＭＩの
出力路に設けた相反転断路器、１３は相反転断路器１２
の送電線側に設けた発電機しゃ断器、１４は発電機しゃ
断器１３の開閉を制御する系統事故検出器、１５はＡＥ
ＳＭｌの２次短絡抵抗、１６は２次短絡抵抗１５の短絡
用しゃ断器であり、前記系統事故検出器１４で開閉制御
される。FIG. 6 is a block diagram showing a conventional control method for an AC excited synchronous machine directly connected to a pump-turbine.
1 is the armature of an AC excited synchronous machine (hereinafter referred to as AESM), 2 is the rotor (secondary coil) of the AESMI, 3 is a reversible pump-turbine directly connected to the rotor 2 via the shaft 4, 5 6 is a cycloconverter connected between the rotor and the excitation converter transformer 5, 7 is a rotation speed detector of the rotor 2, and 8 is a variable speed 9 is a current transformer that detects the output current of AESMI, 10 is an instrument transformer that detects the output voltage of AESMI, and 11 is the output of current transformer 9 and instrument transformer 1.
12 is a phase inverting disconnector provided in the output path of AESMI, 13 is a phase inverting disconnector 12
14 is a system fault detector that controls the opening and closing of the generator breaker 13; 15 is an AE
The secondary short-circuit resistor 16 of SMI is a short-circuit breaker for the secondary short-circuit resistor 15, and its opening and closing are controlled by the system fault detector 14.
上記ポンプ水車３を可変速で運転するには、上記のＡＥ
ＳＭＩを２次励磁する方式が通常採用されている。この
方式によれば、回転速度が変わっても、系統周波数と一
致するように２次励磁の周波数を調整すれば系統との並
列運転が可能である。In order to operate the pump water turbine 3 at variable speed, the above AE
A method of secondary excitation of the SMI is usually adopted. According to this method, even if the rotational speed changes, parallel operation with the grid is possible by adjusting the frequency of secondary excitation to match the grid frequency.
次に、系統事故後のＡＥＳＭＩの制御動作を説明する。Next, the control operation of AESMI after a system fault will be explained.
系統事故検出器１４は系統事故を検出すると、発電機し
ゃ断器１３を開放するとともに短絡用しゃ断器１６を投
入してＡＥＳＭＩを誘導電動機として運転する。そして
系統事故が復旧したことを系統事故検出器１４で検出し
て短絡用しゃ断器１６を開放するとともに発電機しゃ断
器１３を投入し、励磁変換器用変圧器５．サイクロコン
バータ６で２次コイルである回転子２を再励磁して運転
を継続するか、または系統事故時は運転継続を断念して
発Ｎ、機しゃ断器１３を開放するとともに短絡用しゃ断
器１６を投入し、図示していないガイドベーンを閉じて
ポンプ水車３を停止するようにユニットトリップしてい
た。When the system fault detector 14 detects a system fault, it opens the generator breaker 13 and closes the short-circuit breaker 16 to operate the AESMI as an induction motor. Then, the system fault detector 14 detects that the system fault has been restored, opens the short-circuit breaker 16, turns on the generator breaker 13, and connects the excitation converter transformer 5. Either re-energize the rotor 2, which is the secondary coil, in the cycloconverter 6 and continue operation, or in the event of a system failure, give up on continuing operation and turn on the N, open the machine breaker 13, and open the short-circuit breaker 16. The unit was tripped to close the guide vane (not shown) and stop the pump-turbine 3.
従来の交流励磁同期機の制御方法は以上のように構成さ
れているので、系統事故の復旧後に再励磁してもＡＥＳ
Ｍの回転が低下しすぎてスベリが大きくなったり、出力
電圧が低下しすぎたりして、再励磁してもサイクロコン
バータが転流失敗して、機器損傷や系統擾乱を発生させ
るか、系統事故時は常に運転継続を断念せざるを得ない
などの問題点があった。The conventional control method for AC-excited synchronous machines is configured as described above, so even if the machine is re-excited after recovery from a system fault, AES will not occur.
If the rotation of M decreases too much and the slippage becomes large, or the output voltage decreases too much, the cycloconverter will fail to commutate even if it is re-energized, resulting in equipment damage, system disturbance, or a system accident. There were problems such as having to give up on continuing operation at times.
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、系統事故後の復旧時にはＡＥＳＭの運転状態
を監視し、運転継続可能か否かを判断し、ＡＥＳＭの状
態が運転継続可能であれば再励磁し、転流失敗が予想さ
れる場合は、再励磁を断念してユニットトリップするこ
とのできる交流励磁同期機の制御方法を得ることを目的
とする。This invention was made to solve the above-mentioned problems, and when the system is restored after a system accident, the operating status of the AESM is monitored, it is determined whether or not the operation can continue, and the status of the AESM is determined so that the operation can continue. It is an object of the present invention to provide a control method for an AC-excited synchronous machine that can re-energize the machine if so, and give up re-excitation and trip the unit if a commutation failure is expected.
この発明に係る交流励磁同期機の制御方法は、系統事故
復旧後のＡＥＳＭの電圧およびスベリを検出し、その電
圧およびスベリがともに規定値以内であれば再励磁して
運転を継続し、規定値を外れていれば交流励磁同期機を
トリップするようにしたものである。The control method for an AC-excited synchronous machine according to the present invention detects the voltage and slippage of the AESM after recovery from a system fault, and if both the voltage and slippage are within specified values, re-excites the machine and continues operation. If the voltage is off, the AC-excited synchronous machine is tripped.
この発明における交流励磁同期機の制御方法は、ＡＥＳ
Ｍの電圧およびスベリが規定値以内であることを検出し
て再励磁することにより、サイクロコンバータの運転限
界以内に入るため、転流失敗することな（運転継続を可
能とする。The control method of the AC excited synchronous machine in this invention is based on the AES
By detecting that the voltage and slippage of M are within specified values and re-exciting, the cycloconverter is within its operating limits, so commutation failure does not occur (operation can continue).
以下、この発明の一実施例を図について説明する。前記
第６図と同一または相当部分には同一符号を付して重複
説明は省略する。１７はＡＥＳＭｌの端子電圧検出器、
１８はＡＥＳＭＩのスベリ検出器、１９は系統事故時の
ＡＥＳＭＩＩ＋御装置、２０は発電機しゃ断器１３の送
電線側に設けた主変圧器、２１，２２，２３．２４は送
電線しゃ断器、２５．２６は送電線である。An embodiment of the present invention will be described below with reference to the drawings. The same or corresponding parts as in FIG. 6 are given the same reference numerals, and redundant explanation will be omitted. 17 is the terminal voltage detector of AES Ml,
18 is an AESMI slip detector, 19 is an AESMII+ control device in case of a system fault, 20 is a main transformer installed on the power transmission line side of the generator breaker 13, 21, 22, 23, 24 is a power transmission line breaker, 25 .26 is a power transmission line.
次に動作について説明する０例えば、送電線の一回線２
５で短絡・地絡事故２７が発生したとする。この短絡・
地絡事故２７を系統事故検出器１４で検出して、送電線
しゃ断器２１．２２が開放されると、Ａ２３Ｍ制御装置
１９は系統事故検出器１４からの信号を受けて短絡用し
ゃ断器１６を投入し、ＡＥＳＭＬは誘導電動機として継
続運転する。Next, we will explain the operation 0 For example, one line of a power transmission line 2
It is assumed that a short circuit/ground fault accident 27 occurs in 5. This short circuit
When the ground fault 27 is detected by the system fault detector 14 and the transmission line breakers 21 and 22 are opened, the A23M control device 19 receives the signal from the system fault detector 14 and opens the short circuit breaker 16. The AESML continues to operate as an induction motor.
事故が除去され、再閉路にて送電線しゃ断器２１．２２
が投入され、再閉路が成功すれば、その時のＡＥＳＭｌ
の端子電圧とスベリを各々端子電圧検出器１７とスベリ
検出器１８で検出し、端子電圧とスベリが規定値以内で
あれば、Ａ２３Ｍ制御装置１９は短絡用しゃ断器１６を
開放して、再び励磁変換器用変圧器５とサイクロコンバ
ータ６でＡＥＳＭＩの２次コイルである回転子２を励磁
して運転を継続する。The accident has been removed and the power line breaker is closed again at 21.22
is injected and if reclosing is successful, the current AESMl
The terminal voltage and slippage are detected by the terminal voltage detector 17 and the slippage detector 18, respectively, and if the terminal voltage and slippage are within the specified values, the A23M control device 19 opens the short circuit breaker 16 and re-energizes. The rotor 2, which is the secondary coil of the AESMI, is excited by the converter transformer 5 and the cycloconverter 6 to continue operation.
一方、端子電圧検出器１７とスベリ検出器１８で検出し
た電圧、スベリが規定値以上に外れていれば、Ａ Ｅ
Ｓ Ｍ ｔｌｔｌ＋御装置１９は発電機しゃ断器１３を
開放し、ＡＥＳＭＩ、ポンプ水車３をユニットトリップ
して停止させる。On the other hand, if the voltage and slip detected by the terminal voltage detector 17 and slip detector 18 are outside the specified values, A E
The S M tltl+ control device 19 opens the generator breaker 13 and unit trips the AESMI and pump water turbine 3 to stop it.
次にこの動作原理を第２図乃至第５図について説明する
。第２図はサイクロコンバータ６の動作波形を示してお
り、第２図において、Ｕは転流型なり角、γは転流余裕
角、αは点弧角であり、回生運転モード（α〉９０°）
における転流失敗限界により、サイクロコンバーク６の
運転限界が決定される。Next, the principle of operation will be explained with reference to FIGS. 2 to 5. FIG. 2 shows the operating waveform of the cycloconverter 6. In FIG. 2, U is the commutation type angle, γ is the commutation margin angle, α is the firing angle, and the regenerative operation mode (α °)
The operating limit of the cycloconverter 6 is determined by the commutation failure limit at .
第３図は横軸が電源電圧降下の係数にシー１でＰ、 Ｕ
、値、縦軸はＣｏ３７で、パラメータのＫｓ−１はであ
る。In Figure 3, the horizontal axis is the coefficient of power supply voltage drop with sea 1 and P, U
, the value, the vertical axis is Co37, and the parameter Ks-1 is.
第４図は横軸が電源電圧降下の係数Ｋｖ−１でＰ、ｔｌ
、値、縦軸はサイリスタの転流直後の逆バイアス電圧値
Ｅｒで、パラメータのＫｓ−１はＡＥＳＭｌのスベリ係
数である。In Figure 4, the horizontal axis is the coefficient Kv-1 of the power supply voltage drop, P, tl
, value, and the vertical axis is the reverse bias voltage value Er immediately after commutation of the thyristor, and the parameter Ks-1 is the slip coefficient of AESM1.
第５図は横軸が電源電圧降下の係数にシー１でｐ、ｕ、
値、縦軸は転流型なり角Ｕで、パラメータのＫｓ−１！
ｉ：ＡＥＳＭＩのスベリ係数である。In Figure 5, the horizontal axis represents the coefficient of power supply voltage drop, p, u,
The value, the vertical axis is the commutation type angle U, and the parameter Ks-1!
i: AESMI slip coefficient.
上記第３図乃至第５図において、転流余裕角限界値をＧ
Ｏ９Ｔｅａｒｎ ＋ Ｂ ｒｌｉｓｉｔ ＋ ｕｔ
ｉｍｔｔ Ｔ！示ｔと、ｒ ｍａｎはサイリスクのター
ンオフ時間を考えて最少転流余裕角を決め、ｃｏｓγ１
．１を決定する。In Figures 3 to 5 above, the commutation margin angle limit value is G
O9Tearn + B rlistit + ut
imttT! t and r man determine the minimum commutation margin angle considering the turn-off time of the sirisk, and cosγ1
．． Determine 1.
Ｅγ目１Ｌはサイリスタのターンオフ特性より規定され
、規定電圧以上でないと、ターンオフ不可能なことより
ＥＴｌｌｓｉＬを決める。Eγth 1L is defined by the turn-off characteristic of the thyristor, and ETllsiL is determined based on the fact that it cannot be turned off unless the voltage is above the specified voltage.
ｕ ｌ １ａｉＬは例えば１２相サイクロコンバータ構
成であると、サイクロコンバータの転流は距虹−３０”
毎に行っているが、重なり角Ｕが３０’以上に達すると
、転流現象が重なるため、サイクロコンバータの制御が
不安定になり好ましくない。For example, if u l 1aiL is a 12-phase cycloconverter configuration, the commutation of the cycloconverter is 30"
However, if the overlap angle U reaches 30' or more, the commutation phenomena overlap, which makes the control of the cycloconverter unstable, which is not preferable.
位相角αは常に変化しているため、位相角αの変化を考
慮して５″余裕をもたせ、転流型なり角Ｕを２５°以内
に制限する。従って、ｕｔｔ＋ｅ＋ｔ＝２５゜になる。Since the phase angle α is constantly changing, a 5″ margin is provided in consideration of the change in the phase angle α, and the commutation type angle U is limited to within 25°. Therefore, utt+e+t=25°.
（ｕ−１８０°−Ｔ−α）
上記第３図乃至第５図に示すとおり、運転限界はスベリ
係数Ｋｓ−１により変化する０図示例では励磁再開時の
スベリＫｓ−１が０．８以上で、電源電圧降下の係数に
シー１が０．５以上であれば、Ｃ０３Ｔｓｊｎ Ｉ
Ｅ ｒｚ＋ａ＋ｔ 、 ｕｔｉｓｉｔにもかからない
ため、励磁再開しても点弧失敗することなく、励磁が再
開可能であることを示している。(u-180°-T-α) As shown in Figures 3 to 5 above, the operating limit changes depending on the slip coefficient Ks-1. In the illustrated example, the slip Ks-1 at the time of restarting excitation is 0.8 or more. Then, if C1 is 0.5 or more in the coefficient of power supply voltage drop, C03Tsjn I
Since neither E rz+a+t nor utisit is applied, this shows that excitation can be restarted without ignition failure even if excitation is restarted.
なお、上記実施例では、可変速揚水発電所の場合につい
て説明したが、交流励磁同期機を使用した発電機やフラ
イホイール付発電機の場合であってもよい、また、２次
励磁装置としてサイクロコンバータで説明したが、他の
変換器、例えばＧＴＯコンバータであってもよ（、上記
実施例と同様の効果を奏する。In the above embodiment, the case of a variable speed pumped storage power plant was explained, but it may also be a generator using an AC excited synchronous machine or a generator with a flywheel, or a cyclotron as a secondary excitation device. Although the converter has been described, other converters, such as a GTO converter, may also be used (the same effects as in the above embodiments can be achieved).
以上のように、この発明によれば、系統事故復旧後、Ａ
ＥＳＭの端子電圧やスベリを検出し、この両者が規定値
以内であれば再励磁して運転を継続し、規定値以外であ
れば再励磁を断念してＡＥＳＭをトリップするようにし
たので、機器や系統に悪影響を与えず、安定化と信鯨性
を高める効果がある。As described above, according to the present invention, after the system accident is restored, the A
The terminal voltage and slippage of the ESM are detected, and if both are within specified values, re-excitation is performed and operation continues, and if they are outside the specified values, re-excitation is abandoned and the AESM is tripped. It has the effect of increasing stability and reliability without having a negative impact on the water system.
第１図はこの発明の一実施例によるＡＥＳＭの制御方法
を説明するブロック図、第２図はサイクロコンバータの
動作波形図、第３図乃至第５図はサイクロコンバータの
転流失敗限界を示す特性図、第６図は従来のＡＥＳＭの
制御方法を説明するブロック図である。
■は交流励磁同期機、２は回転子。
なお、図中、同一符号は同一、または相当部分を示す。Fig. 1 is a block diagram illustrating a control method of the AESM according to an embodiment of the present invention, Fig. 2 is an operating waveform diagram of the cycloconverter, and Figs. 3 to 5 are characteristics showing commutation failure limits of the cycloconverter. 6 are block diagrams illustrating a conventional AESM control method. ■ is an AC excited synchronous machine, and 2 is a rotor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
磁同期機をその回転子を短絡して誘導電動機として運転
し、前記系統の事故復旧後、前記交流励磁同期機の出力
電圧およびスベリを検出し、この出力電圧およびスベリ
が規定値以内であれば前記交流励磁同期機の励磁を再開
して運転を継続し、規定値以外であれば前記交流励磁同
期機をトリップするようにしたことを特徴とする交流励
磁同期機の制御方法。In the event of an accident in a system to which an AC-excited synchronous machine is connected, the AC-excited synchronous machine is operated as an induction motor by short-circuiting its rotor, and after the system is restored from the accident, the output voltage and slippage of the AC-excited synchronous machine are reduced. If the output voltage and slippage are within specified values, the excitation of the AC-excited synchronous machine is restarted and operation is continued, and if the output voltage and slippage are outside the specified values, the AC-excited synchronous machine is tripped. Characteristic control method for AC-excited synchronous machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63307875A JPH02155500A (en) | 1988-12-07 | 1988-12-07 | Control method of ac excited synchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63307875A JPH02155500A (en) | 1988-12-07 | 1988-12-07 | Control method of ac excited synchronous machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02155500A true JPH02155500A (en) | 1990-06-14 |
Family
ID=17974215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63307875A Pending JPH02155500A (en) | 1988-12-07 | 1988-12-07 | Control method of ac excited synchronous machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02155500A (en) |
-
1988
- 1988-12-07 JP JP63307875A patent/JPH02155500A/en active Pending
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