JPH0467440B2 - - Google Patents
Info
- Publication number
- JPH0467440B2 JPH0467440B2 JP59218703A JP21870384A JPH0467440B2 JP H0467440 B2 JPH0467440 B2 JP H0467440B2 JP 59218703 A JP59218703 A JP 59218703A JP 21870384 A JP21870384 A JP 21870384A JP H0467440 B2 JPH0467440 B2 JP H0467440B2
- Authority
- JP
- Japan
- Prior art keywords
- exciter
- field current
- synchronous machine
- current
- transformer
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、励磁機の回転部分における整流素
子の短絡または開放およびこれに伴うヒユーズ
断、アーム間の短絡等の異常を検出する回路に係
り、特に制御対象の同期機出力と励磁機界磁電流
とを監視することにより前記異常を監視し得るブ
ラシレス励磁方式における励磁機の異常検出回路
に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a circuit for detecting short-circuits or open-circuits of rectifier elements in the rotating part of an exciter, and associated abnormalities such as blown fuses and short-circuits between arms. In particular, the present invention relates to an abnormality detection circuit for an exciter in a brushless excitation system that can monitor the abnormality by monitoring the output of a synchronous machine to be controlled and the exciter field current.
従来、この種励磁機の異常を検出する方式とし
て、例えば励磁機の界磁巻線に設けた検出巻線に
より検出する方法や、励磁機の電機子巻線の中性
点とアース間の電圧周波信号を取り出し、その波
形を監視することにより検出する方式が提案され
ている。しかしながら、これらの検出方式は、構
成が複雑となるばかりでなく、製造コストも増大
する難点があつた。
Conventionally, methods for detecting abnormalities in this type of exciter include, for example, detection using a detection winding installed in the field winding of the exciter, and detection of the voltage between the neutral point of the armature winding of the exciter and ground. A detection method has been proposed that extracts a frequency signal and monitors its waveform. However, these detection methods not only have a complicated configuration but also have the disadvantage of increasing manufacturing costs.
このような観点から、出願人は先に励磁機界磁
電流値を所定の設定値と比較し、得られた偏差値
を監視することにより、ブラシレス励磁機の異常
を検出する方法を開発した。しかし、この場合、
励磁機界磁電流検出値と比較すべき値は予め設定
されているため、制御対象である同期機のあらゆ
る状態において、励磁機の異常を連続的に検出す
ることができない欠点があつた。 From this perspective, the applicant has developed a method for detecting abnormalities in the brushless exciter by first comparing the exciter field current value with a predetermined set value and monitoring the obtained deviation value. But in this case,
Since the value to be compared with the exciter field current detection value is set in advance, there is a drawback that abnormalities in the exciter cannot be continuously detected in all states of the synchronous machine being controlled.
そこで、本発明においては、同期機の出力から
励磁機界磁電流を算出し、この界磁電流算出値と
実際の励磁機界磁電流の検出値とを比較すること
により、同期機の凡ゆる運転状態におけるブラシ
レス励磁機の異常を連続的にしかも適正に検出す
ることができるブラシレス励磁方式における励磁
機の異常検出回路を提供するにある。
Therefore, in the present invention, the exciter field current is calculated from the output of the synchronous machine, and this calculated value of the field current is compared with the actual detected value of the exciter field current. An object of the present invention is to provide an abnormality detection circuit for an exciter in a brushless excitation system, which can continuously and appropriately detect abnormalities in the brushless exciter in an operating state.
従つて、本発明においては、励磁機の回転整流
器出力を同期機の界磁電流として供給する同期機
のブラシレス励磁回路において、同期機の出力よ
り励磁機界磁電流を算出し、一方実際の励磁機に
供給される界磁電流を検出し、この検出値と前記
算出値とを比較して励磁機の異常を検出するよう
構成することを特徴とする。
Therefore, in the present invention, in a brushless excitation circuit of a synchronous machine that supplies the rotary rectifier output of the exciter as the field current of the synchronous machine, the exciter field current is calculated from the output of the synchronous machine, while the actual excitation The present invention is characterized in that it is configured to detect a field current supplied to the exciter and compare this detected value with the calculated value to detect an abnormality in the exciter.
前記励磁機の異常検出回路において、同期機の
主回路に励磁変圧器と変流器と計器用変圧器とを
接続配置し、前記励磁変圧器の出力ラインより励
磁機界磁電流を検出し、前記変流機と計器用変圧
器の出力より電力・無効電力変換器を介して励磁
機介磁電流を算出するよう構成することができ
る。 In the abnormality detection circuit of the exciter, an excitation transformer, a current transformer, and an instrument transformer are connected and arranged in the main circuit of the synchronous machine, and an exciter field current is detected from the output line of the excitation transformer; The exciter current can be configured to be calculated from the outputs of the current transformer and the potential transformer via a power/reactive power converter.
なお、励磁機の異常検出動作は、励磁機界磁電
流の検出値が励磁機界磁電流の算出値より増大し
てこの状態が一定時間経過した後励磁機の異常を
検出するよう構成すればよい。 In addition, the abnormality detection operation of the exciter can be configured to detect an abnormality of the exciter after the detected value of the exciter field current increases than the calculated value of the exciter field current and this state has elapsed for a certain period of time. good.
さらに、同期機の出力より励磁機界磁電流を算
出するに際し、同期機の飽和係数を加えれば、よ
り正確に界磁電流を算出することができる。 Furthermore, when calculating the exciter field current from the output of the synchronous machine, by adding the saturation coefficient of the synchronous machine, the field current can be calculated more accurately.
本発明によれば、同期機の出力を常に監視して
励磁機界磁電流を算出し、一方励磁機に実際に供
給される界磁電流を検出し、これらの界磁電流を
常時比較監視することができることから、励磁機
の異常を迅速かつ確実に検知することができる。
According to the present invention, the output of the synchronous machine is constantly monitored to calculate the exciter field current, while the field current actually supplied to the exciter is detected, and these field currents are constantly compared and monitored. Therefore, abnormalities in the exciter can be detected quickly and reliably.
次に、本発明に係るブラシレス励磁方式におけ
る励磁機の異常検出回路の実施例につき添付図面
を参照しながら以下詳細に説明する。
Next, an embodiment of an abnormality detection circuit for an exciter in a brushless excitation system according to the present invention will be described in detail with reference to the accompanying drawings.
第１図は本発明に係る励磁機の異常検出回路の
一実施例を示す同期発電機のブラシレス励磁回路
を示す。第１図において、参照符号１０は同期発
電機、１２は励磁機を示す。同期発電機１０は固
定子１４と回転子１６とを備え、固定子１４側主
回路には励磁変圧器１８、変流器２０および計器
用変圧器２２がそれぞれ接続配置される。一方、
励磁機１２は、固定子２４と回転整流機２６およ
び電機子２８からなる回転子３０とを備え、前記
回転整流器２６の出力端が前記同期発電機１０の
回転子１６に接続される。しかるに、前記励磁機
１２の固定子２４に対する給電は、前記励磁変圧
器１８の出力電圧をサイリスタ整流器３２を介し
て行われる。このようにして固定子２４に対する
給電は、前記変流器２０および計器用変圧器２２
で検出される電流および電圧を適宜電力・無効電
力変換器３４を介して調整される自動電圧調整装
置３６の作用下に前記サイリスタ整流器３２を制
御することにより調整される。 FIG. 1 shows a brushless excitation circuit for a synchronous generator, which is an embodiment of the abnormality detection circuit for an exciter according to the present invention. In FIG. 1, reference numeral 10 indicates a synchronous generator, and 12 indicates an exciter. The synchronous generator 10 includes a stator 14 and a rotor 16, and an excitation transformer 18, a current transformer 20, and an instrument transformer 22 are respectively connected to the main circuit on the stator 14 side. on the other hand,
The exciter 12 includes a stator 24 , a rotor 30 made up of a rotary rectifier 26 and an armature 28 , and an output end of the rotary rectifier 26 is connected to the rotor 16 of the synchronous generator 10 . However, power is supplied to the stator 24 of the exciter 12 by using the output voltage of the excitation transformer 18 through the thyristor rectifier 32. In this way, power is supplied to the stator 24 through the current transformer 20 and the potential transformer 22.
The current and voltage detected by the thyristor rectifier 32 are regulated accordingly under the action of an automatic voltage regulator 36 which is regulated via a power/reactive power converter 34.
以上の構成は、同期発電機１０に対するブラシ
レス励磁回路の基本構成である。そこで、本発明
においては、前記第１図に示す励磁機１２の異常
を検出する手段として、励磁機１２の固定子２４
へ給電を行う励磁変圧器１８からサイリスタ変流
機３２に至る給電ラインに変流器３８を設け、こ
の変流器３８によつて検出される励磁電流Ifeと、
前記電力・無効電力変換器３４からの出力と、さ
らに所定の設定器４０より出力させる同期発電機
１０の飽和係数とを入力して現在の発電機出力を
発生させるのに必要な励磁機界磁電流Ifcaを算出
し、前記検出励磁電流Ifeとの比較を行つて励磁
機１２の異常を検出する励磁機異常検出装置４２
を設けたことを特徴とする。 The above configuration is the basic configuration of the brushless excitation circuit for the synchronous generator 10. Therefore, in the present invention, as a means for detecting an abnormality in the exciter 12 shown in FIG.
A current transformer 38 is provided in the power supply line from the excitation transformer 18 that supplies power to the thyristor current transformer 32, and the excitation current I fe detected by the current transformer 38,
The exciter field required to generate the current generator output by inputting the output from the power/reactive power converter 34 and the saturation coefficient of the synchronous generator 10 output from a predetermined setting device 40. An exciter abnormality detection device 42 that calculates the current I fca and compares it with the detected excitation current I fe to detect an abnormality in the exciter 12.
It is characterized by having the following.
次に、前記構成からなる本実施例の励磁機異常
検出回路の動作につき説明する。 Next, the operation of the exciter abnormality detection circuit of this embodiment having the above configuration will be explained.
今、励磁機１２の飽和を無視すれば、同期発電
機１０の界磁電流と励磁機１２の界磁電流とは比
例する。また、同期発電機１０の飽和がなけれ
ば、発電機出力に必要な励磁機界磁電流は第２図
に示す方法により算出することができる。 Now, if saturation of the exciter 12 is ignored, the field current of the synchronous generator 10 and the field current of the exciter 12 are proportional. Furthermore, if the synchronous generator 10 is not saturated, the exciter field current required for the generator output can be calculated by the method shown in FIG.
すなわち、第２図において、曲線は発電機出
力限界特性を示し、また直線は発電機界磁電流
特性を示す。この発電機界磁電流特性によつて
形成されるΔAOBにおいて、は発電機の皮相
電力、はこの皮相電力を出力するのに必要な
主界磁電流（または励磁機界磁電流Ifca）である。
また、は略１／xdとなる。 That is, in FIG. 2, the curve shows the generator output limit characteristic, and the straight line shows the generator field current characteristic. In ΔAOB formed by this generator field current characteristic, is the apparent power of the generator, and is the main field current (or exciter field current I fca ) required to output this apparent power. .
Also, is approximately 1/xd.
さらに、1はPiとQiから求められる力率角で、
2は直角（90゜）となる。従つて、前記励磁機異
常検出装置４２においては、前述したΔAOBか
ら余弦定理を使用して現在の発電機出力を発生さ
せるのに必要な励磁機界磁電流Ifcaを算出するこ
とができる。なお、励磁機界磁電流Ifcaは、電
力・無効電力の他に、電圧、電流、力率等の関係
から算出することもできるし、また発電機電機子
電流を使用することも可能である。 Furthermore, 1 is the power factor angle found from Pi and Qi,
2 is a right angle (90°). Therefore, in the exciter abnormality detection device 42, the exciter field current I fca required to generate the current generator output can be calculated from the above-mentioned ΔAOB using the cosine theorem. In addition, the exciter field current I fca can be calculated from the relationship between voltage, current, power factor, etc. in addition to electric power and reactive power, and it is also possible to use the generator armature current. .
そこで、例えば励磁機１２の回転子３０の内部
で回転整流器２６もしくは電機子２８の巻線に故
障が発生すると、発電機１０の固定子界磁巻線１
６に供給される界磁電流が不足し、発電機１０の
出力電圧は低下して系統並列運転時には進相運転
方向となる。このため、自動電圧調整装置３６は
励磁機１２の界磁を強めるよう作動する。従つ
て、変流器３８により検出される実際の励磁電流
Ifeは、正常時より増加する。 Therefore, for example, if a failure occurs in the rotary rectifier 26 or the winding of the armature 28 inside the rotor 30 of the exciter 12, the stator field winding 1 of the generator 10
6 becomes insufficient, the output voltage of the generator 10 decreases, and when the system is parallel operated, it becomes a phase-advanced operation direction. Therefore, the automatic voltage regulator 36 operates to strengthen the field of the exciter 12. Therefore, the actual magnetizing current detected by current transformer 38
Ife increases from normal.
この結果、励磁機異常検出装置４２において
は、前記励磁電流Ifeを装置内部で算出した励磁
機界磁電流Ifcaと比較し、一定時間以上Ife＞Ifcaの
状態が継続していることで、励磁機１２の異常を
検出する。この異常検出動作は第３図に示す通り
である。なお、第３図において参照符号４４はタ
イマを示す。 As a result, the exciter abnormality detection device 42 compares the excitation current I fe with the exciter field current I fca calculated inside the device, and determines that the state of I fe > I fca continues for a certain period of time or more. Then, an abnormality in the exciter 12 is detected. This abnormality detection operation is as shown in FIG. Note that in FIG. 3, reference numeral 44 indicates a timer.
以上の動作説明は、発電機１０の飽和を無視し
たものであるが、発電機運転時に要求される励磁
機界磁電流Ifcaは、第１図に示すように励磁機異
常検出装置４２に予め算出あるいは実測された発
電機の飽和係数を設定器４０を介して入力するこ
とにより、より正確に求めることができる。 The above explanation of the operation ignores the saturation of the generator 10, but the exciter field current I fca required during generator operation is determined in advance by the exciter abnormality detection device 42 as shown in FIG. By inputting the calculated or measured saturation coefficient of the generator via the setting device 40, it can be determined more accurately.
前述した実施例から明らかなように、本発明に
よれば、同期機の出力を監視してこの出力を得る
に必要な励磁機界磁電流を算出し、この算出され
た界磁電流と実際の界磁電流を比較することによ
り、同期機の凡ゆる運転状態時におけるブラシレ
ス励磁機の異常を連続的にしかも確実に検出する
ことができる。しかも本発明回路は、既設のブラ
シレス励磁回路に対し回路的変更を行うことなく
応用することができるばかりでなく、例えば自動
電圧調整装置等の制御機器に直接組込んで設ける
こともできる。
As is clear from the embodiments described above, according to the present invention, the output of the synchronous machine is monitored, the exciter field current necessary to obtain this output is calculated, and the calculated field current is compared with the actual field current. By comparing the field currents, it is possible to continuously and reliably detect abnormalities in the brushless exciter under all operating conditions of the synchronous machine. Moreover, the circuit of the present invention can not only be applied to an existing brushless excitation circuit without making any circuit changes, but also can be directly incorporated into a control device such as an automatic voltage regulator.
以上、本発明の好適な実施例について説明した
が、本発明の精神を逸脱しない範囲内において
種々の設計変更をなし得ることは勿論である。 Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.
第１図は本発明に係るブラシレス励磁方式にお
ける励磁機の異常検出回路の一実施例を示す回路
図、第２図は本発明異常検出回路において算出す
る励磁機界磁電流の算出方法を説明する特性線
図、第３図は本発明異常検出回路において異常検
出を行う場合の動作説明図である。
１０……同期発電機、１２……励磁機、１４…
…固定子、１６……回転子、１８……励磁変圧
器、２０……変流器、２２……計器用変圧器、２
４……固定子、２６……回転整流器、２８……電
機子、３０……回転子、３２……サイリスタ整流
器、３４……電力・無効電力変換器、３６……自
動電圧調整装置、３８……変流器、４０……設定
器、４２……異常検出装置、４４……タイマ、
……発電機出力限外特性曲線、……発電機界磁
電流特性線。
Fig. 1 is a circuit diagram showing an embodiment of an abnormality detection circuit for an exciter in a brushless excitation system according to the present invention, and Fig. 2 explains a method for calculating the exciter field current calculated in the abnormality detection circuit of the present invention. The characteristic diagram in FIG. 3 is an explanatory diagram of the operation when detecting an abnormality in the abnormality detection circuit of the present invention. 10...Synchronous generator, 12...Exciter, 14...
... Stator, 16 ... Rotor, 18 ... Excitation transformer, 20 ... Current transformer, 22 ... Instrument transformer, 2
4... Stator, 26... Rotating rectifier, 28... Armature, 30... Rotor, 32... Thyristor rectifier, 34... Power/reactive power converter, 36... Automatic voltage regulator, 38... ... Current transformer, 40 ... Setting device, 42 ... Abnormality detection device, 44 ... Timer,
... Generator output limit characteristic curve, ... Generator field current characteristic line.
Claims (1)
として供給する同期機のブラシレス励磁回路にお
いて、同期機の出力より励磁機界磁電流を算出
し、一方実際の励磁機に供給される界磁電流を検
出し、この検出値と前記算出値とを比較して励磁
機の異常を検出するよう構成することを特徴とす
るブラシレス励磁方式における励磁機の異常検出
回路。 ２ 特許請求の範囲第１項記載の励磁機の異常検
出回路において、同期機の主回路に励磁変圧器と
変流器と計器用変圧器とを接続配置し、前記励磁
変圧器の出力ラインより励磁機界磁電流を検出
し、前記変流器と計器変圧器の出力より電力・無
効電力変換器を介して励磁機界磁電流を算出する
よう構成してなるブラシレス励磁方式における励
磁機の異常検出回路。 ３ 特許請求の範囲第１項記載の励磁機の異常検
出回路において、励磁機界磁電流の検出値が励磁
機界磁電流の算出値より増大してこの状態が一定
時間経過した後励磁機の異常を検出するよう構成
してなるブラシレス励磁方式における励磁機の異
常検出回路。 ４ 特許請求の範囲第１項または第２項記載の励
磁機の異常検出回路において、同期機の出力より
励磁機界磁電流を算出するに際し、同期機の飽和
係数を加えてなるブラシレス励磁方式における励
磁機の異常検出回路。[Claims] 1. In a brushless excitation circuit for a synchronous machine that supplies the output of a rotary rectifier of an exciter as a field current of a synchronous machine, the exciter field current is calculated from the output of the synchronous machine, while the actual exciter An abnormality detection circuit for an exciter in a brushless excitation system, characterized in that the circuit is configured to detect a field current supplied to the exciter, and compare this detected value with the calculated value to detect an abnormality in the exciter. 2. In the abnormality detection circuit for an exciter according to claim 1, an excitation transformer, a current transformer, and an instrument transformer are connected and arranged in the main circuit of the synchronous machine, and the output line of the excitation transformer is connected to the main circuit of the synchronous machine. An abnormality in the exciter in a brushless excitation system configured to detect the exciter field current and calculate the exciter field current from the output of the current transformer and the instrument transformer via a power/reactive power converter. detection circuit. 3. In the abnormality detection circuit for an exciter according to claim 1, the detected value of the exciter field current increases from the calculated value of the exciter field current, and after this state has elapsed for a certain period of time, the exciter An abnormality detection circuit for an exciter in a brushless excitation system configured to detect an abnormality. 4. In the abnormality detection circuit for an exciter according to claim 1 or 2, in the brushless excitation method, the saturation coefficient of the synchronous machine is added when calculating the exciter field current from the output of the synchronous machine. Exciter abnormality detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59218703A JPS6198198A (en) | 1984-10-19 | 1984-10-19 | Malfunction detection circuit of exciter in brushless excitation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59218703A JPS6198198A (en) | 1984-10-19 | 1984-10-19 | Malfunction detection circuit of exciter in brushless excitation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6198198A JPS6198198A (en) | 1986-05-16 |
| JPH0467440B2 true JPH0467440B2 (en) | 1992-10-28 |
Family
ID=16724090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59218703A Granted JPS6198198A (en) | 1984-10-19 | 1984-10-19 | Malfunction detection circuit of exciter in brushless excitation system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6198198A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2581650C1 (en) * | 2015-02-24 | 2016-04-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (национальный исследовательский университет) (ФГБОУ ВПО "ЮУрГУ" (НИУ)) | Power unit with controlled reactive power, magnitude and phase of voltage |
| CN113644851A (en) * | 2021-07-06 | 2021-11-12 | 中国长江三峡集团有限公司 | State maintenance method for generator excitation system |
-
1984
- 1984-10-19 JP JP59218703A patent/JPS6198198A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6198198A (en) | 1986-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8362732B2 (en) | Motor phase winding fault detection method and apparatus | |
| DE69805641T2 (en) | DEVICE AND METHOD FOR CONTROLLING A SYNCHRONOUS MOTOR WITH PERMANENT MAGNET | |
| US4000464A (en) | Arrangement for detecting ground leaks in the rotor circuit of a brushless synchronous machine excited by rotating rectifiers | |
| US20110089883A1 (en) | Motor phase winding fault detection method and apparatus | |
| US5644458A (en) | Induction machine protection device | |
| US5896257A (en) | Two sensor for over-current protection and current sensing configuration motor control | |
| JPH0467440B2 (en) | ||
| JPH11337590A (en) | Direct current detecting device | |
| JP2870559B2 (en) | Rotary rectifier failure detection device for brushless generator | |
| DE2832845A1 (en) | PROTECTIVE DEVICE FOR A BRUSHLESS EXCITATION DEVICE | |
| US5122634A (en) | Welding transformer control apparatus | |
| JPS55164378A (en) | Detecting unit for ground-fault trouble of brushless rotary generator | |
| DE3730829C2 (en) | Overload protection for the excitation circuit of a synchronous machine | |
| JPH0352600A (en) | Fault detection method and exciting method of brushless exciter | |
| JP3081709B2 (en) | Apparatus and method for detecting field ground fault of variable speed generator motor | |
| JPH04285459A (en) | Field abnormality detector for brushless synchronous machine | |
| EP0135874B1 (en) | Control system for ac electric car | |
| JPH0751000B2 (en) | Variable speed controller for induction motor | |
| JPS6041815Y2 (en) | Silicon fault detection device for rotating rectifier | |
| JPS5934049B2 (en) | Synchronous machine step-out prediction method | |
| JPH02119560A (en) | Detector for layer short-circuit of field winding of synchronous machine | |
| JP2501894B2 (en) | Abnormality detection device for process system of automatic voltage regulator | |
| JP3649780B2 (en) | Electric power steering device | |
| JPS58159699A (en) | Exciter for electric machine | |
| JPH0548599U (en) | Step-out prevention device for synchronous machine |