JPS63178799A - Exciter for synchronous generator - Google Patents
Exciter for synchronous generatorInfo
- Publication number
- JPS63178799A JPS63178799A JP62008048A JP804887A JPS63178799A JP S63178799 A JPS63178799 A JP S63178799A JP 62008048 A JP62008048 A JP 62008048A JP 804887 A JP804887 A JP 804887A JP S63178799 A JPS63178799 A JP S63178799A
- Authority
- JP
- Japan
- Prior art keywords
- generator
- voltage
- specified value
- field current
- feedback signal
- 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
- 230000001360 synchronised effect Effects 0.000 title claims description 7
- 230000005284 excitation Effects 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、同期発電機の励磁装置に係り、特に、電圧確
立時の、発電機端子電圧フィードバック信号喪失を確実
に検出し、界磁しゃ断器を開放することにより発電機過
電圧を防止する機能を有する同期発電機用励磁装置に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an excitation device for a synchronous generator, and in particular, to reliably detect loss of generator terminal voltage feedback signal when voltage is established, and perform field cutoff. The present invention relates to an excitation device for a synchronous generator that has a function of preventing generator overvoltage by opening the generator.
従来の装置は、「火力原子力発電、 Ｊｕｌ、、 １．
９８２゜８３ページ〜９７ページ」の第１２図に示す如
くなっており、発電機電圧確立時（系統並入面）の、電
圧フィードバック信号喪失により生ずる発電機過電圧に
対する保護は、保護リレー盤等に取付けられた発電機過
電圧保護リレーのみで行なわれており、過電圧保護リレ
ー用の発電機電圧フィードバック信号も、同時に喪失し
た場合については、特に配慮されていなかった。The conventional equipment is "Thermal Nuclear Power Generation", 1.
982゜pages 83 to 97'', protection against generator overvoltage caused by loss of voltage feedback signal when generator voltage is established (grid connection side) is provided by a protective relay board, etc. This is done only by the attached generator overvoltage protection relay, and no special consideration was given to the case where the generator voltage feedback signal for the overvoltage protection relay was also lost at the same time.
上記従来技術（特に、］−組の電圧変成器信号しか励磁
装置に供給されていない場合）は、電圧確立時の電圧フ
ィードバック信号喪失によって生ずる発電機過電圧の保
護は、過電圧保護継電器のみで行なわれており、過電圧
保護継電器用の電圧検出信号も同時に喪失してしまった
場合には、過電圧保護ができないという問題があった。In the prior art described above (in particular, when only - sets of voltage transformer signals are supplied to the exciter), protection against generator overvoltage caused by loss of voltage feedback signal during voltage establishment is provided only by overvoltage protection relays. Therefore, if the voltage detection signal for the overvoltage protection relay is also lost at the same time, there is a problem that overvoltage protection cannot be achieved.
。
本発明の目的は、電圧確立時（発電機系統並入前）の励
磁装置への電圧フィードバック信号喪失によって生ずる
発電機過電圧の保護を、過電圧保護継電器が、動作不能
状態においても、確実に実行できる容易な方法を提供す
ることにある。. An object of the present invention is to enable an overvoltage protection relay to reliably protect generator overvoltage caused by loss of voltage feedback signal to the excitation device during voltage establishment (before the generator system is connected) even in an inoperable state. The idea is to provide an easy way.
上記目的は、発電機端子電圧、及び発電機界磁電流を、
あらかじめ設定された値と比較し、発電機界磁電流が、
規定値以上になっているにもかかわらず、発電機端子電
圧が規定値以下の場合には、励磁装置用フィードバック
信号喪失と判定する機能を励磁装置に付加することによ
り、達成される。The above purpose is to change the generator terminal voltage and generator field current to
Compared with the preset value, the generator field current is
This can be achieved by adding a function to the excitation device that determines that the feedback signal for the excitation device has been lost if the generator terminal voltage is below the specified value even though it is above the specified value.
発電機端子電圧は、電圧変成器を介して励磁装置に供給
される。電圧検出回路は、このフィードバック信号と、
あらかじめ設定された規定値とを比較回路により比較し
、規定値以下であれば、比較回路に接続された補助リレ
ーを励磁する。The generator terminal voltage is supplied to the exciter via a voltage transformer. The voltage detection circuit uses this feedback signal and
A comparison circuit compares it with a preset specified value, and if it is less than the specified value, an auxiliary relay connected to the comparison circuit is energized.
発電機界磁電流は、分流器（シャント）を介して励磁装
置に供給される。界磁電流検出回路は、この界磁電流信
号と、あらかじめ設定された規定値とを比較回路により
比較し、界磁電流が規定値以上であれば、比較回路に接
続された補助リレーを励磁する。The generator field current is supplied to the exciter via a shunt. The field current detection circuit compares this field current signal with a preset specified value using a comparison circuit, and if the field current is greater than or equal to the specified value, excites the auxiliary relay connected to the comparison circuit. .
上記、２つの補助リレーの接点が、同時に″閉″となっ
た場合、励磁装置用電圧フィードバック信号と判定し、
発電機をトリップするので、発電機過電圧保護継電器用
電圧信号も同時に喪失した場合でも、電圧確立時（発電
機系統並入前）の過電圧保護を確実に行なうことができ
る。If the contacts of the two auxiliary relays are "closed" at the same time, it is determined to be a voltage feedback signal for the exciter,
Since the generator is tripped, even if the voltage signal for the generator overvoltage protection relay is also lost at the same time, overvoltage protection can be reliably performed when the voltage is established (before the generator is connected to the system).
以下、本発明の一実施例を第１図により説明する。１は
同期発電機、２は界磁コイル、３は発電機系統並入用し
や継器、４は計器用変成器（ＰＴ）、５は計器用変流器
、６は励磁電源変圧器、７は分流器（シャント）、８は
励磁装置を示している。An embodiment of the present invention will be described below with reference to FIG. 1 is a synchronous generator, 2 is a field coil, 3 is a relay for parallel use in the generator system, 4 is a potential transformer (PT), 5 is a current transformer for instruments, 6 is an exciting power supply transformer, 7 indicates a shunt, and 8 indicates an excitation device.
電圧検出回路１０は、計器用変圧器４を介して検出され
た電圧フィードバック信号と、電圧規定値設定器９によ
り設定された設定値（例：定格値の６０％）を比較し、
検出電圧値が規定値以下であれば、接点１１を閉路し、
補助リレー（Ｒ’ＹＩ）１２を励磁する。一方、界磁電
流検出回路１−４は、分流器（シャンＩ・）７を介して
検出された界磁電流信号と、界磁電流規定値設定器１３
により設定された設定値（例：無負荷定格界磁電流の９
５％）を比較し、検出界磁電流値が規定値以上であれば
、接点１５を閉路し、補助リレー（ＲＹ２）１６を励磁
する。補助リレー（ＲＹＩ）の接点１７と。The voltage detection circuit 10 compares the voltage feedback signal detected via the potential transformer 4 with a set value (e.g. 60% of the rated value) set by the voltage specified value setting device 9,
If the detected voltage value is below the specified value, the contact 11 is closed,
Energize the auxiliary relay (R'YI) 12. On the other hand, the field current detection circuit 1-4 receives the field current signal detected via the shunt (shunt I) 7 and the field current specified value setting device 13.
The setting value set by (e.g. 9 of the no-load rated field current)
5%), and if the detected field current value is greater than or equal to the specified value, the contact 15 is closed and the auxiliary relay (RY2) 16 is energized. Contact 17 of the auxiliary relay (RYI).
補助リレー（ＲＹ２）の接点１８を直列に接続し、両接
点が同時に閉路した場合には、励磁装置用発電機電圧フ
ィードバック信号喪失として発電機トリップ回路に信号
を供給する。The contacts 18 of the auxiliary relay (RY2) are connected in series, and when both contacts are closed at the same time, a signal is provided to the generator trip circuit as a loss of the generator voltage feedback signal for the exciter.
本実施例によれば、発電機電圧確立時（発電機系統並入
前）の励磁装置フィードバック信号喪失を発電機過電圧
継電器に依存することなく検出することができる。According to this embodiment, the loss of the excitation device feedback signal when the generator voltage is established (before the generator system is connected) can be detected without depending on the generator overvoltage relay.
本発明によれば、発電機電圧確立時（発電機系統並入前
）の励磁装置フィードバック信号喪失の検出を、１組の
計器用変成器のみで、しかも、発電機過電圧保護継電器
に依存することなく行なうことができ、発電機の過電圧
保護を確実に、また容易な方法で実現することができる
という効果がある。According to the present invention, detection of loss of exciter feedback signal when the generator voltage is established (before the generator is connected to the generator system) can be detected using only one instrument transformer and relying on the generator overvoltage protection relay. This has the advantage that overvoltage protection of the generator can be achieved reliably and easily.
第１図は、励磁装置に本発明の一実施例の概要を示した
単線図である。
１・・・同期発電機、２・・・発電機界磁コイル、３・
・・発電機系統並入用しや継器、４・・・計器用変圧器
（’ＰＴ）、５・・・計器用変流器、６・・・励磁電源
変圧器、７・・・分流器（シャント）、８・・・励磁装
置、９・・・電圧規定値設定器、１０・・・電圧検出回
路、１１・・・接点、１２・・・補助リレー、１３・・
・界磁電流規定値設定器、１−４・・・界磁電流検出回
路、１５・・・接点、１６・・・補助リレー。FIG. 1 is a single line diagram showing an outline of an embodiment of the present invention in an excitation device. 1... Synchronous generator, 2... Generator field coil, 3...
... Generator system parallel relay, 4... Potential transformer ('PT), 5... Instrument current transformer, 6... Excitation power supply transformer, 7... Shunting Shunt, 8... Excitation device, 9... Voltage specified value setting device, 10... Voltage detection circuit, 11... Contact, 12... Auxiliary relay, 13...
- Field current specified value setter, 1-4... Field current detection circuit, 15... Contact, 16... Auxiliary relay.
Claims (1)
出する励磁装置において、発電機端子電圧、及び発電機
界磁電流を規定値と比較することにより、電圧確立時の
電圧フィードバック信号喪失を検出する、発電機過電圧
防止機能を設けたことを特徴とする同期発電機用励磁装
置。1. In an excitation device that detects the synchronous generator terminal voltage via a set of voltage transformers, a voltage feedback signal is generated when the voltage is established by comparing the generator terminal voltage and generator field current with specified values. An excitation device for a synchronous generator, characterized by having a generator overvoltage prevention function that detects loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62008048A JPS63178799A (en) | 1987-01-19 | 1987-01-19 | Exciter for synchronous generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62008048A JPS63178799A (en) | 1987-01-19 | 1987-01-19 | Exciter for synchronous generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63178799A true JPS63178799A (en) | 1988-07-22 |
Family
ID=11682452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62008048A Pending JPS63178799A (en) | 1987-01-19 | 1987-01-19 | Exciter for synchronous generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63178799A (en) |
-
1987
- 1987-01-19 JP JP62008048A patent/JPS63178799A/en active Pending
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