JPH01238448A - Rotor protector for rotary electric machine - Google Patents
Rotor protector for rotary electric machineInfo
- Publication number
- JPH01238448A JPH01238448A JP6332188A JP6332188A JPH01238448A JP H01238448 A JPH01238448 A JP H01238448A JP 6332188 A JP6332188 A JP 6332188A JP 6332188 A JP6332188 A JP 6332188A JP H01238448 A JPH01238448 A JP H01238448A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- rotor
- magnetic flux
- auxiliary
- air gap
- 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
- 230000001012 protector Effects 0.000 title 1
- 238000004804 winding Methods 0.000 claims abstract description 53
- 230000004907 flux Effects 0.000 claims abstract description 18
- 230000005284 excitation Effects 0.000 claims description 24
- 230000001629 suppression Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000010248 power generation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Induction Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は回転電機の回転子保護装置に係り、特に二次励
磁誘導発電機の二次励磁巻線の過電圧保護に好適な保護
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotor protection device for a rotating electric machine, and particularly to a protection device suitable for overvoltage protection of a secondary excitation winding of a doubly excitation induction generator.
従来の二次励磁誘導発電機の二次励磁巻線を過電圧から
保護する保護装置は、］９９８７７７月２８の電気学会
研究会資料 電力技術研究会ＰＥ−８７−１３８”可変
速発電システムの動特性シミュレーション（その２）″
の２，３項に述べられているように、二次励磁巻線を短
絡するものである。The protection device that protects the secondary excitation winding of a conventional doubly excitation induction generator from overvoltage is [998777 July 28 IEEJ Study Group Materials Electric Power Technology Study Group PE-87-138” Dynamic Characteristics of Variable Speed Power Generation System Simulation (Part 2)''
As stated in Sections 2 and 3, the secondary excitation winding is short-circuited.
しかしこのような従来の保護装置は、系統事故時などに
二次励磁巻線を短絡すると、回転数が過速（発電時）あ
るいは減速（揚水時）して不安定となり、該発電機が接
続された電力系統にじよう乱を与えるという問題点があ
った。However, with these conventional protection devices, if the secondary excitation winding is short-circuited in the event of a system failure, the rotation speed will overspeed (during power generation) or decelerate (during water pumping) and become unstable, resulting in the generator being disconnected. There was a problem in that it caused disturbances to the electrical power system.
従って本発明の目的は、回転電機の運転を安定に維持し
て電力系統にじよう乱を与えることなく二次励磁巻線を
過電圧から保護することができる回転電機の回転子保護
装置を提供することにある。Therefore, an object of the present invention is to provide a rotor protection device for a rotating electrical machine that can maintain stable operation of the rotating electrical machine and protect the secondary excitation winding from overvoltage without disturbing the power system. There is a particular thing.
本発明はこの目的を達成するために、二次励磁巻線を装
着した回転子を備えた回転電機の回転子保護装置におい
て、前記回転子に前記二次励磁巻線から独立した補助巻
線を設け、この補助巻線端子を空隙磁束急変時に閉合す
条スイッチに接続したことを特徴とする。In order to achieve this object, the present invention provides a rotor protection device for a rotating electric machine equipped with a rotor equipped with a secondary excitation winding, in which the rotor is provided with an auxiliary winding independent of the secondary excitation winding. The auxiliary winding terminal is connected to a strip switch that closes when the air gap magnetic flux suddenly changes.
回転電機が通常運転状態にあるときはスイッチが開放し
ているので補助巻線には電流が流れず、二次励磁巻線に
影響を与えない。しかし、電力系統などに事故が発生し
て空隙磁束が急変するとスイッチが閉合して補助巻線が
短絡閉回路を構成する。これにより、空隙磁束の変化１
こ相応して補助巻線に短絡電流が流れてカウンター磁束
が発生するので、空隙磁束の急変が抑制され、二次励磁
巻線に過電圧が発生することがない。従って、二次励磁
巻線による励磁を維持して発電運転または電動運転を安
定に継続することができる。When the rotating electrical machine is in normal operation, the switch is open, so no current flows through the auxiliary winding and does not affect the secondary excitation winding. However, if an accident occurs in the power system or the like and the air gap magnetic flux suddenly changes, the switch closes and the auxiliary winding forms a short-circuit closed circuit. As a result, the change in air gap magnetic flux 1
Correspondingly, a short-circuit current flows through the auxiliary winding and a counter magnetic flux is generated, so that sudden changes in the air gap magnetic flux are suppressed and no overvoltage is generated in the secondary excitation winding. Therefore, it is possible to maintain the excitation by the secondary excitation winding and continue the power generation operation or the electric operation stably.
以下、本発明の一実施例を図を参照して説明する。図は
回転子巻線の展開図で、全スロット数が２８０、極数が
２０（１極当りのスロット数が１４）の例を示している
。三相の二次励磁巻線１に対しては、スロット番号が７
の倍数のスロットを除いて１極１相当り４スロツトが割
当てられ、該スロットに巻装された該三相の二次励磁巻
線１はコレクタリング（図示せず）を介して固定部の励
磁装置（図示せず）に接続される。スロット番号が７の
奇数倍のスロットに巻装されて１ポールピツチ離れた第
１の補助者１ｉ２ａは互いに接続され、更に過電圧によ
り自ら点弧する機能を有するスイッチである自己点弧形
サイリスタ３ａで短絡するように接続される。同様に、
この第１の補助巻線２ａのスロットに対して半ポールピ
ッチずれた位置にあるスロット番号が７の偶数倍のスロ
ットに巻装されて１ポールピツチ離れた第２の補助巻線
２ｂも互いに接続され、更に過電圧により自ら点弧する
自己点弧形サイリスタ３ｂで短絡するように接続される
。２つのサイリスタ３ａ、３ｂが点弧する電圧は、通常
運転状態のときに発生する電圧より高く巻線の絶縁強度
よりは低い値に設定される。An embodiment of the present invention will be described below with reference to the drawings. The figure is a developed view of the rotor winding, showing an example in which the total number of slots is 280 and the number of poles is 20 (the number of slots per pole is 14). For three-phase secondary excitation winding 1, the slot number is 7.
Four slots are assigned to one pole, excluding slots that are a multiple of connected to a device (not shown). The first auxiliary members 1i2a, which are wound in slots whose slot numbers are odd multiples of 7 and are one pole pitch apart, are connected to each other, and further short-circuited by a self-ignition type thyristor 3a, which is a switch that has the function of igniting itself due to overvoltage. Connected to Similarly,
The second auxiliary winding 2b, which is located at a position shifted by half a pole pitch from the slot of the first auxiliary winding 2a and whose slot number is an even multiple of 7, is also connected to the second auxiliary winding 2b, which is one pole pitch away. Furthermore, a self-starting type thyristor 3b which starts by itself due to overvoltage is connected so as to short-circuit. The voltage at which the two thyristors 3a and 3b fire is set to a value higher than the voltage generated during normal operating conditions and lower than the insulation strength of the windings.
このような回転電機によれば、電力系統に事故が発生し
て電機子巻線に直流成分が重畳し、これによって空隙磁
束が変化して二次励磁巻線１に過電圧が発生しようとす
ると、サイリスタ３ａ。According to such a rotating electrical machine, if an accident occurs in the power system and a DC component is superimposed on the armature winding, this changes the air gap magnetic flux and generates an overvoltage in the secondary excitation winding 1. Thyristor 3a.
３ｂが点弧して補助巻線２ａ、２ｂを短絡し、これらに
短絡電流を流して空隙磁束の変化を打消すカウンター磁
束を発生する。従って、空隙磁束の急変は抑制されて二
次励磁巻線１に過電圧が発生することがない。２組の補
助巻線２ａ、２ｂは半ポールピッチずれた位置にあるた
め、磁極の位置が回転子上を移動しても、何れかの補助
巻線２ａ。3b is ignited to short-circuit the auxiliary windings 2a and 2b, causing a short-circuit current to flow through them to generate a counter magnetic flux that cancels the change in the air gap magnetic flux. Therefore, sudden changes in the air gap magnetic flux are suppressed, and no overvoltage is generated in the secondary excitation winding 1. Since the two sets of auxiliary windings 2a and 2b are located at positions shifted by half a pole pitch, even if the position of the magnetic poles moves on the rotor, either of the auxiliary windings 2a.
２ｂが磁極の直軸に存在することになり、確実に上記抑
制作用を発揮する。2b is present on the perpendicular axis of the magnetic pole, thereby reliably exerting the above-mentioned suppressing effect.
補助巻線２ａ、２ｂの共通点を固定部にあるサイリスタ
３ａ、３ｂに接続するために用いるコレクタリングは、
二次励磁巻線の中性点引出し用コレクタリングを共用す
ることによって、構造が簡単になる。The collector ring used to connect the common point of the auxiliary windings 2a, 2b to the thyristors 3a, 3b in the fixed part is:
By sharing the collector ring for drawing out the neutral point of the secondary excitation winding, the structure becomes simple.
また、自己点弧形サイリスタ３ａ、３ｂは点弧パルス信
号が不要であるから回転子上に設けてコレクタリングを
少なくすることも可能であり、バリスタなどの非直線抵
抗素子に変えても同様な効果が得られる。In addition, since the self-ignition thyristors 3a and 3b do not require a firing pulse signal, they can be installed on the rotor to reduce collector ring, and the same effect can be obtained by replacing them with non-linear resistance elements such as varistors. Effects can be obtained.
以上のように本発明によれば、系統事故などにより回転
電機の空隙磁束が急変して二次励磁巻線に過電圧が発生
しようとすると、補助巻線に短絡電流が流れてカウンタ
ー磁束を発生して空隙磁束の急変を抑制するので二次励
磁巻線に過電圧が発生することがなく、従って二次励磁
を継続して回転電機の運転を安定に維持することができ
る、As described above, according to the present invention, when an overvoltage is generated in the secondary excitation winding due to a sudden change in the air gap magnetic flux of the rotating electric machine due to a system fault, etc., a short-circuit current flows in the auxiliary winding and generates a counter magnetic flux. Since sudden changes in the air gap magnetic flux are suppressed, overvoltage does not occur in the secondary excitation winding, and therefore secondary excitation can be continued to maintain stable operation of the rotating electrical machine.
図は本発明になる回転子巻線の展開図である。
１・・・二次励磁巻線、２ａ、２ｂ・・補助巻線、３ａ
。
３ｂ・・・自己点弧形サイリスタ。
代理人 弁理士 小川勝外、４ぷヒ夙
（・・パThe figure is a developed view of the rotor winding according to the present invention. 1... Secondary excitation winding, 2a, 2b... Auxiliary winding, 3a
. 3b...Self-starting thyristor. Agent: Patent attorney Katsugai Ogawa,
Claims (1)
回転子保護装置において、前記回転子に前記二次励磁巻
線から独立した補助巻線を設け、この補助巻線端子を空
隙磁束急変時に閉合するスイッチに接続したことを特徴
とする回転電機の回転子保護装置。 ２、特許請求の範囲第１項記載において、前記補助巻線
は半ポールピッチずらして複数個設けたことを特徴とす
る回転電機の回転子保護装置。 ３、特許請求の範囲第１項において、前記スイッチは回
転子上に設けたことを特徴とする回転電機の回転子保護
装置。 ４、特許請求の範囲第１項において、前記スイッチは固
定部に設けられ、コレクタリングを介して前記補助巻線
に接続されることを特徴とする回転電機の回転子保護装
置。 ５、特許請求の範囲第４項において、二次励磁巻線の中
間点引出し用コレクタリングを前記補助巻線の共通点引
出し用コレクタリングに共用することを特徴とする回転
電機の回転子保護装置。[Claims] 1. In a rotor protection device for a rotating electric machine equipped with a rotor equipped with a secondary excitation winding, the rotor is provided with an auxiliary winding independent of the secondary excitation winding, and this A rotor protection device for a rotating electric machine, characterized in that an auxiliary winding terminal is connected to a switch that closes when the air gap magnetic flux suddenly changes. 2. A rotor protection device for a rotating electrical machine as set forth in claim 1, wherein a plurality of the auxiliary windings are provided with a half-pole pitch shift. 3. A rotor protection device for a rotating electric machine according to claim 1, wherein the switch is provided on a rotor. 4. A rotor protection device for a rotating electrical machine according to claim 1, wherein the switch is provided on a fixed part and connected to the auxiliary winding via a collector ring. 5. A rotor protection device for a rotating electric machine according to claim 4, characterized in that a collector ring for drawing out the intermediate point of the secondary excitation winding is also used as a collector ring for drawing out the common point of the auxiliary winding. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6332188A JPH01238448A (en) | 1988-03-18 | 1988-03-18 | Rotor protector for rotary electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6332188A JPH01238448A (en) | 1988-03-18 | 1988-03-18 | Rotor protector for rotary electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01238448A true JPH01238448A (en) | 1989-09-22 |
Family
ID=13225886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6332188A Pending JPH01238448A (en) | 1988-03-18 | 1988-03-18 | Rotor protector for rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01238448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029015A2 (en) * | 1997-11-28 | 1999-06-10 | Asea Brown Boveri Ab | Method and device for controlling the magnetic flux with an auxiliary winding in a hv ac machine |
-
1988
- 1988-03-18 JP JP6332188A patent/JPH01238448A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029015A2 (en) * | 1997-11-28 | 1999-06-10 | Asea Brown Boveri Ab | Method and device for controlling the magnetic flux with an auxiliary winding in a hv ac machine |
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