JPH0333174Y2 - - Google Patents
Info
- Publication number
- JPH0333174Y2 JPH0333174Y2 JP12525283U JP12525283U JPH0333174Y2 JP H0333174 Y2 JPH0333174 Y2 JP H0333174Y2 JP 12525283 U JP12525283 U JP 12525283U JP 12525283 U JP12525283 U JP 12525283U JP H0333174 Y2 JPH0333174 Y2 JP H0333174Y2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- feedback signal
- output voltage
- generator
- generator output
- 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
Links
- 230000005284 excitation Effects 0.000 claims description 12
- 238000010304 firing Methods 0.000 claims description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Eletrric Generators (AREA)
- Protection Of Generators And Motors (AREA)
Description
【考案の詳細な説明】
この発明は発電機の励磁装置に関し、電圧帰還
信号線、特に途中に帰還信号値の大きさを調整す
る調整用抵抗が挿入されている場合の引出線断線
等事故に対する防護を目的とする。[Detailed Description of the Invention] The present invention relates to an excitation device for a generator, and is designed to prevent accidents such as breakage of the lead line when a voltage feedback signal line, particularly an adjustment resistor for adjusting the magnitude of the feedback signal value, is inserted in the middle of the voltage feedback signal line. For the purpose of protection.
第１図は実施例の帰還信号系に調整用抵抗を挿
入した発電機の励磁装置のブロツク線図である。
同図において、１は発電機本体、１２は電圧検出
器、３は変圧器、１４はサイリスタ、５は電圧調
整器、９は初期励磁回路であり、出力電圧が確立
していない初期の段階では、発電機の励磁は別途
電源より初期励磁回路９を介して行われる。出力
電圧が確立して後は、発電機出力が変圧器３、サ
イリスタ４を介して帰還され励磁入力となり、か
つサイリスタ４の点弧位相角は電圧調整器５によ
り求めた、基準電圧と出力電圧帰還信号との偏差
信号、に応じて決定される。 FIG. 1 is a block diagram of an excitation device for a generator in which an adjusting resistor is inserted in the feedback signal system of the embodiment.
In the figure, 1 is the generator main body, 12 is the voltage detector, 3 is the transformer, 14 is the thyristor, 5 is the voltage regulator, and 9 is the initial excitation circuit. Excitation of the generator is performed via an initial excitation circuit 9 from a separate power source. After the output voltage is established, the generator output is fed back through the transformer 3 and thyristor 4 and becomes the excitation input, and the firing phase angle of the thyristor 4 is determined by the reference voltage and output voltage determined by the voltage regulator 5. It is determined according to the deviation signal from the feedback signal.
すなわち、定常運転時にあつては、設定の基準
電圧に発電機出力電圧の帰還信号を比較、偏差を
求め、その偏差信号に応じサイリスタ４の点弧位
相角を調整して、発電機出力電圧を上記基準電圧
の一定値に維持するよう制御している。従つて、
帰還信号線の断線、特に調整用抵抗への引出個所
の断線等事故により、帰還信号が基準電圧との間
の比較器まで送られてこない場合、比較器出力
は、発電機出力電圧を零とみなし最大値となる。
すなわち、サイリスタゲート位相角はフル点弧と
なり、発電機励磁は過励磁、出力電圧は過電圧と
なり、この結果、各種の負荷機器、更には発電機
の励磁巻線等本体の焼損事故につながる。 That is, during steady operation, the feedback signal of the generator output voltage is compared with the set reference voltage to find the deviation, and the firing phase angle of the thyristor 4 is adjusted according to the deviation signal to adjust the generator output voltage. The reference voltage is controlled to be maintained at a constant value. Therefore,
If the feedback signal is not sent to the comparator between the reference voltage and the reference voltage due to an accident such as a disconnection of the feedback signal line, especially a disconnection of the lead-out point to the adjustment resistor, the comparator output will not match the generator output voltage to zero. This is the deemed maximum value.
That is, the thyristor gate phase angle becomes full ignition, the generator excitation becomes overexcitation, and the output voltage becomes overvoltage, which results in burnout of various load devices and even the main body of the generator, such as the excitation winding.
この考案は上記に鑑み、電圧帰還信号系路途中
の調整用抵抗の出力電圧調整範囲が高々10％程度
であるのに鑑み、例えば15％のツエナーダイオー
ドをこの調整用抵抗の引出し個所に並列接続して
引出線の断線等事故の場合、出力電圧の上昇をこ
のツエナーダイオードにより定常時の15％上昇程
度に抑えるようにしたものである。 In view of the above, and considering that the output voltage adjustment range of the adjustment resistor in the voltage feedback signal path is approximately 10% at most, this idea was developed by connecting, for example, a 15% Zener diode in parallel to the lead-out point of this adjustment resistor. In the event of an accident such as a disconnection of the lead wire, the Zener diode suppresses the rise in output voltage to about 15% of the normal rise.
第１図において、６が本考案に係るツエナーダ
イオードで、調整用抵抗７の断線等がない正常時
には、この調整用抵抗７が機能し、ツエナーダイ
オード６は遮断されたと同様の状態にある。調整
用抵抗７あるいはその引出線が断線した場合、ツ
エナーダイオード６の両端には、ツエナー電圧以
上の電圧が加わりツエナーダイオード６は励起さ
れ電流が流れ、発電機出力電圧の帰還信号は電圧
検出器２、ダイオード８、ツエナーダイオード６
を経て比較器にまで伝達され基準電圧と比較、偏
差が求められる。この偏差信号に応じてサイリス
タ点弧位相角が演算されサイリスタ４が点弧さ
れ、発電機出力が変圧器３、サイリスタ４を介し
発電機励磁巻線に加えられ、出力電圧が定まる。
すなわち、ツエナーダイオード６の挿入されてい
ない従来例の場合、発電機出力からの電圧帰還信
号は喪失し偏差は最大となり、サイリスタ４はフ
ル点弧状態となり、発電機出力電圧は過電圧とな
るが、ツエナーダイオード６挿入により正規の帰
還信号大きさよりツエナー電圧分だけ減算される
が、電圧帰還信号の喪失は免れ、ツエナー電圧に
相当する分上昇した出力電圧を発生する。 In FIG. 1, reference numeral 6 denotes a Zener diode according to the present invention. During normal operation, when there is no disconnection of the adjusting resistor 7, the adjusting resistor 7 functions and the Zener diode 6 is in the same state as if it were cut off. When the adjusting resistor 7 or its lead wire is disconnected, a voltage higher than the Zener voltage is applied to both ends of the Zener diode 6, and the Zener diode 6 is excited and current flows, and the feedback signal of the generator output voltage is sent to the voltage detector 2. , diode 8, Zener diode 6
The voltage is transmitted to a comparator, where it is compared with a reference voltage and the deviation is determined. The thyristor firing phase angle is calculated in accordance with this deviation signal, the thyristor 4 is fired, the generator output is applied to the generator excitation winding via the transformer 3 and the thyristor 4, and the output voltage is determined.
That is, in the case of the conventional example in which the Zener diode 6 is not inserted, the voltage feedback signal from the generator output is lost and the deviation is maximum, the thyristor 4 is in a full firing state, and the generator output voltage becomes an overvoltage. By inserting the Zener diode 6, the Zener voltage is subtracted from the normal feedback signal magnitude, but the loss of the voltage feedback signal is avoided and an output voltage increased by an amount corresponding to the Zener voltage is generated.
定常時と調整用抵抗の引出線断線の場合の電圧
帰還信号ｖを数式で表すと、正常時では、
ｖ＝Ｖ×R2／R1＋R2＋Ｒ ……(1)
Ｖ：出力電圧、Ｒ：調整用抵抗値
断線時では、
ｖ＝（Ｖ−Vzd）×R2／R1＋R2 ……(2)
Vzd：ツエナー電圧
となり、この(1)，(2)式をグラフで表すと、第２図
のようになる。すなわち、実施例の場合、調整用
抵抗７の抵抗値Ｒを零から最大値まで変えた場
合、電圧帰還信号ｖの変化範囲は、発電機出力電
圧Ｖを高々10％程度増減するに過ぎず、従つてツ
エナー電圧は、例えば発電機出力電圧Ｖの上昇を
15％を程度に押えるよう選べば、定常時の運転に
は何ら差支えない。数式で表すと、発電機出力電
圧Ｖの定格値をV0、断線時における出力電圧を
Vfとすれば。 Expressing the voltage feedback signal v in a mathematical formula in steady state and in the case of disconnection of the adjustment resistor lead wire, in normal state, v = V × R 2 / R 1 + R 2 + R ... (1) V: Output voltage, R : Adjustment resistance value At the time of disconnection, v=(V-Vzd)×R 2 /R 1 +R 2 ...(2) Vzd: Zener voltage. Expressing equations (1) and (2) in a graph, It will look like Figure 2. That is, in the case of the embodiment, when the resistance value R of the adjustment resistor 7 is changed from zero to the maximum value, the range of change in the voltage feedback signal v is only about 10% increase or decrease in the generator output voltage V. Therefore, the Zener voltage, for example, increases the generator output voltage V.
If you choose to keep it to 15%, there will be no problem in normal operation. Expressed mathematically, the rated value of the generator output voltage V is V 0 , and the output voltage at the time of disconnection is
If it is Vf.
Vf−V0／V0≒0.15 になるよう、ツエナー電圧Vzdを選べぱよい。 The Zener voltage Vzd can be selected so that Vf−V 0 /V 0 ≒0.15.
上記のように、この考案は交流発電機の励磁装
置にあつて、出力電圧の帰還信号系に調整用抵抗
が挿入され、その抵抗値を変えることにより帰還
信号量を調整し、発電機出力電圧を制御する発電
機の制御装置において、調整用抵抗の引出し個所
にツエナーダイオードを並列接続したこと、かつ
そのツエナー電圧を正常運転時における調整用抵
抗最大のときの出力電圧より若干上廻るよう設定
したことを特徴とするもので、調整用抵抗の引出
線断線事故にあつても、調整用抵抗に代え上記ツ
エナーダイオードを経て帰還信号が伝達され、発
電機出力電圧は定格値の例えば15％増程度の上昇
にとどめることができる。すなわち、従来装置
が、調整用抵抗の断線等の場合、帰還信号が伝達
されず偏差は最大となりサイリスタはフルに点弧
され発電機出力電圧は自己励磁の最大値（定格の
150〜250％）まで上昇し、発電機界磁巻線とか発
電機負荷の各種機器の焼損事故を招来していたの
であるが、この考案によれば、断線時にあつても
発電機出力電圧は定格値の15％増程度に制限さ
れ、上述のような事故は未然に防止できる。 As mentioned above, this idea is for an excitation device of an alternator, in which an adjustment resistor is inserted into the feedback signal system of the output voltage, and by changing the resistance value, the amount of feedback signal is adjusted, and the output voltage of the generator is In the generator control device that controls the generator, a Zener diode is connected in parallel to the point where the adjustment resistor is drawn out, and the Zener voltage is set to be slightly higher than the output voltage when the adjustment resistor is at its maximum during normal operation. This feature is that even in the event of a disconnection accident in the lead wire of the adjustment resistor, a feedback signal is transmitted through the Zener diode instead of the adjustment resistor, and the generator output voltage increases by about 15% of the rated value, for example. The increase can be limited to . In other words, in the conventional device, if the adjustment resistor is disconnected, the feedback signal is not transmitted and the deviation is maximum, the thyristor is fully fired, and the generator output voltage reaches the maximum self-excitation value (rated value).
150 to 250%), leading to burnout accidents of generator field windings and various generator load equipment.However, according to this idea, even in the event of a disconnection, the generator output voltage remains unchanged. The increase is limited to about 15% of the rated value, and accidents like the one described above can be prevented.
図面は第１図が実施例のブロツク線図、第２図
がその動作を説明するためのグラフである。
１……発電機本体、４……サイリスタ、５……
電圧調整機、６……ツエナーダイオード、７……
調整用抵抗。
As for the drawings, FIG. 1 is a block diagram of the embodiment, and FIG. 2 is a graph for explaining its operation. 1... Generator main body, 4... Thyristor, 5...
Voltage regulator, 6... Zener diode, 7...
Adjustment resistance.
Claims (1)
比較し偏差を求め、その偏差信号に基づきサイリ
スタの点弧位相角を調整して、発電機出力電圧を
上記基準電圧の一定値に維持するとともに、発電
機出力電圧の帰還信号経路に調整用抵抗を挿入し
帰還信号量の調整を行うようにした発電機の励磁
装置において、上記帰還信号経路を、発電機出力
電圧Ｖを検出する電圧検出器２と、ダイオード８
と、ツエナーダイオードVzdを並列接続した調整
用抵抗Ｒ７との直列路に、分圧抵抗Ｒ１，Ｒ２を
接続して構成し、帰還信号Ｖを、演算式(1) ｖ＝Ｖ×Ｒ／R1＋R2＋Ｒ ……(1) で求めた正常状態における値から、調整用抵抗７
あるいはその引出線の断線事故の際、上記ツエナ
ーダイオードVzdを励起した状態での演算式(2) ｖ＝（Ｖ−Vzd）×R2／R1＋R2 ……(2) で求めた値に切り替えるようにしたことを特徴と
する発電機の励磁装置。[Claim for Utility Model Registration] Compare the set reference voltage and the feedback signal of the generator output voltage to find the deviation, adjust the firing phase angle of the thyristor based on the deviation signal, and adjust the generator output voltage to the above reference. In a generator excitation device that maintains the voltage at a constant value and adjusts the amount of feedback signal by inserting an adjustment resistor into the feedback signal path of the generator output voltage, the feedback signal path is connected to the generator output voltage. Voltage detector 2 that detects voltage V and diode 8
The voltage dividing resistors R1 and R2 are connected in series with the adjustment resistor R7 in which the Zener diode Vzd is connected in parallel, and the feedback signal V is calculated using the calculation formula (1) v=V×R/R1+R2+R... …From the value in the normal state found in (1), adjust the adjustment resistor 7.
Alternatively, in the event of a disconnection accident in the lead wire, the value is switched to the value calculated using the equation (2) v=(V-Vzd)×R2/R1+R2...(2) while the Zener diode Vzd is excited. A generator excitation device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12525283U JPS6034799U (en) | 1983-08-11 | 1983-08-11 | Generator excitation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12525283U JPS6034799U (en) | 1983-08-11 | 1983-08-11 | Generator excitation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6034799U JPS6034799U (en) | 1985-03-09 |
| JPH0333174Y2 true JPH0333174Y2 (en) | 1991-07-15 |
Family
ID=30285240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12525283U Granted JPS6034799U (en) | 1983-08-11 | 1983-08-11 | Generator excitation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6034799U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007202286A (en) * | 2006-01-26 | 2007-08-09 | Toshiba Corp | Excitation device of synchronous machine |
-
1983
- 1983-08-11 JP JP12525283U patent/JPS6034799U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6034799U (en) | 1985-03-09 |
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