JPH0356100A - Exciting method and exciting equipment of generator - Google Patents
Exciting method and exciting equipment of generatorInfo
- Publication number
- JPH0356100A JPH0356100A JP1189029A JP18902989A JPH0356100A JP H0356100 A JPH0356100 A JP H0356100A JP 1189029 A JP1189029 A JP 1189029A JP 18902989 A JP18902989 A JP 18902989A JP H0356100 A JPH0356100 A JP H0356100A
- Authority
- JP
- Japan
- Prior art keywords
- generator
- excitation
- field
- control amount
- voltage
- 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
- 238000000034 method Methods 0.000 title claims description 20
- 230000005284 excitation Effects 0.000 claims description 88
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010304 firing Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 101100437162 Gallus gallus AVR7 gene Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、発電機の励磁方法及び励磁装置に係り、特に
励磁装置の電源電圧変動に起因する発電機出力の変動を
抑制すること、さらには電力系統の動揺を抑制するに好
適な技術に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a generator excitation method and an excitation device, and particularly to suppressing fluctuations in the generator output caused by power supply voltage fluctuations of the excitation device, and furthermore, relates to a technique suitable for suppressing fluctuations in an electric power system.
一般に発電機の出力電圧制御は、自動電圧調整装置(以
下AVRと称する)により出力電圧と基準電圧の偏差を
求めるとともに、この偏差を零にするような制御指令を
励磁装置に出力し、これによって界磁電流を調整する方
法が知られている。Generally, the output voltage control of a generator is performed by determining the deviation between the output voltage and the reference voltage using an automatic voltage regulator (hereinafter referred to as AVR), and outputting a control command to the excitation device to reduce this deviation to zero. Methods of adjusting field current are known.
例えば、雑誌(火力原子力発電: 「計装・制御と自動
化」第86頁〜第88頁、昭和58年6月20日発行)
に記載されたものによれば、サイリスタ励磁装置の点弧
位相を上記偏差に応じてAVRで制御し、これにより界
磁電流を調整して発電機出力電圧を基準電圧に保持する
ようにしている。For example, a magazine (Thermal Nuclear Power Generation: "Instrumentation, Control and Automation" pages 86-88, published June 20, 1982)
According to what is described in , the firing phase of the thyristor excitation device is controlled by the AVR according to the above deviation, thereby adjusting the field current to maintain the generator output voltage at the reference voltage. .
しかし、上記従来技術は、励磁装置の電源電圧変動によ
る影響を考慮していないことから、励磁電源電圧の変動
に応じて発電機の出力電圧が変動するという制御誤差の
問題がある。この問題は無効電力の発生につながるもの
である。However, since the above-mentioned conventional technology does not take into account the influence of fluctuations in the power supply voltage of the excitation device, there is a problem of control errors in which the output voltage of the generator fluctuates in accordance with fluctuations in the excitation power supply voltage. This problem leads to the generation of reactive power.
すなわち,励磁電源電圧の変動は一般に長周期(例えば
、IHz程度以下)のものであり、通常のAVRゲイン
では除去できないのである。逆に、除去するために単に
AVRゲインを上げると、電力系統の安定度が低下する
という問題が生ずる。That is, fluctuations in the excitation power supply voltage generally have a long period (for example, about IHz or less), and cannot be removed by a normal AVR gain. Conversely, if the AVR gain is simply increased in order to remove it, a problem arises in that the stability of the power system decreases.
また、電力系統安定化という点からみると、特開昭58
−36199号公報に,系統安定化装置(以下、PSS
という)に界磁電流をフィードバックして、動態安定限
界付近における電力動揺の抑制を図る技術が記載されて
いる。Also, from the point of view of power system stabilization,
-36199, the system stabilization device (hereinafter referred to as PSS)
This paper describes a technique for suppressing power fluctuations near the dynamic stability limit by feeding back the field current to the dynamic stability limit.
しかし,同公報の技術は、電力動揺抑制を主とするもの
であることから、少なくともI H z以上の周波数帯
域にある界磁電流の変動分に応答する特性のものであり
、励磁電源電圧の変動の如き長周期の定常的変動には対
応することができず、それに起因する出力電圧の変動を
低減することができない。However, since the technology disclosed in the publication is primarily concerned with suppressing power fluctuations, it has characteristics that respond to fluctuations in the field current in a frequency band of at least I Hz or higher, and the technology responds to fluctuations in the field current in a frequency band of at least I Hz or higher. It is not possible to cope with long-period steady fluctuations such as fluctuations, and it is not possible to reduce fluctuations in the output voltage caused by such fluctuations.
本発明の目的は、励磁電源電圧の変動に起因する制御誤
差を低減できる発電機の励磁方法及び励磁装置を提供す
ることにある。An object of the present invention is to provide a generator excitation method and an excitation device that can reduce control errors caused by fluctuations in excitation power supply voltage.
また、他の目的は、上記目的に加え、簡単な構成で電力
系統の動揺をも抑制できる発電機の励磁方法及び励磁装
置を提供することにある。In addition to the above objects, another object is to provide a generator excitation method and an excitation device that can suppress fluctuations in the power system with a simple configuration.
上記目的を達成するため、本発明は、発電機の出力電圧
と基準電圧との偏差を検出し、この偏差が零になるよう
に発電機の界磁制御を行なうことを含んでなる発電機の
励磁方法において、発電機の界磁電流又は界磁電流に相
当する電気量を検出し、この検出値を負帰還して界磁制
御量を補正することを特徴とする。In order to achieve the above object, the present invention provides a method for exciting a generator, which includes detecting a deviation between the output voltage of the generator and a reference voltage, and controlling the field of the generator so that this deviation becomes zero. The present invention is characterized in that the field current of the generator or the quantity of electricity corresponding to the field current is detected, and the detected value is negatively fed back to correct the field control amount.
なお、前記界磁制御量の補正は励磁電源電圧の変動又は
/および電力系統の動揺を抑制する補正量に定めること
が可能である。Note that the correction of the field control amount can be set to a correction amount that suppresses fluctuations in the excitation power supply voltage and/or fluctuations in the power system.
また、上記方法を実施する本発明装置は、発電機の出力
電圧を基準電圧に一致させるべく,発電機の界磁制御量
を決定する自動電圧調整手段を有してなる発電機の励磁
装置において、発電機の界磁電流又はこれに相当する電
気量を検出する界磁電流検出手段と、この検出量を負帰
還して前記界磁制御量を補正する界磁電流帰還補正手段
を設けたことを特徴とする。Furthermore, the device of the present invention that implements the above method is a generator excitation device that includes automatic voltage adjustment means that determines the field control amount of the generator in order to make the output voltage of the generator match the reference voltage. The present invention is characterized in that it is provided with a field current detection means for detecting the field current of the machine or an electric quantity equivalent thereto, and a field current feedback correction means for correcting the field control amount by negatively feeding back this detected amount. .
なお、前記界磁電流帰還補正手段は、その伝達関数が前
記励磁装置の電@電圧変動を抑制する要素と,電力系統
の動揺を抑制する要素の少なくとも一方を含んでなるも
のとすることができる。Note that the field current feedback correction means may have a transfer function that includes at least one of an element that suppresses voltage fluctuations of the excitation device and an element that suppresses fluctuations in the power system. .
また、本発明の他の励磁方法は、発電機の出方電圧を基
準電圧に一致させるように,その偏差に応じて発電機の
界磁制御を行なうことを含んでなる発電機の励磁方法に
おいて、前記界磁電力を供給する励磁電源電圧の変動量
を検出し、この検出変動量を零にすべく前記界磁制御量
を補正することを特徴とする。Further, another excitation method of the present invention is a generator excitation method comprising controlling the field of the generator according to the deviation so that the output voltage of the generator matches the reference voltage. The present invention is characterized in that the amount of variation in the excitation power supply voltage that supplies field power is detected, and the field control amount is corrected so as to make the detected amount of variation zero.
また、上記他の方法を実施する本発明装置は,励磁装置
本体と、自動電圧調整装置とを備え、前記自動電圧調整
装置は、発電機の出力電圧を入力し,この出力電圧を基
準電圧に一致させるようにその偏差に応じた界磁制御量
を決定するものとされ,前記励磁装置本体は、前記界磁
制御量を入力し、この界磁制御量に応じた界磁電流を発
電機に供給するものとされた発電機の励磁装置において
、前記励磁装置本体の電源電圧の変動を検出し、この電
源電圧の変動による界磁電流の変動を低減するように前
記界磁制御量を補正する手段を設けたことを特徴とする
。Further, the device of the present invention for carrying out the other method described above includes an excitation device main body and an automatic voltage regulator, and the automatic voltage regulator receives the output voltage of the generator and converts this output voltage into a reference voltage. A field control amount is determined according to the deviation so as to match the field control amount, and the excitation device main body is configured to input the field control amount and supply a field current to the generator according to the field control amount. The excitation device for a generator is characterized by comprising means for detecting fluctuations in the power supply voltage of the excitation device main body and correcting the field control amount so as to reduce fluctuations in the field current due to fluctuations in the power supply voltage. do.
以下、本発明を実施例に基づいて説明する。 Hereinafter, the present invention will be explained based on examples.
第1図は、本発明を適用してなる発電機の励磁装置と自
動電圧調整装置(AVR)の一実施例の全体構或図を示
す。FIG. 1 shows the overall structure of an embodiment of a generator excitation device and an automatic voltage regulator (AVR) to which the present invention is applied.
発電機は電機子1と界磁巻線2を含んでなる。The generator includes an armature 1 and a field winding 2.
電機子1は主変圧器3を介して電力系統に接続されてい
る.界磁巻Is!2はサイリスタ整流装置からなる励磁
装置本体(以下、単に励磁装置という)4の出力端に接
続されている。励磁装置4の入力端は励磁変圧器5を介
して励磁電源としての所内電源系統に接続され、交流電
力を直流に変換して界磁巻線2に供給するようになって
いる。Armature 1 is connected to the power grid via main transformer 3. Field volume Is! Reference numeral 2 is connected to the output end of an excitation device main body (hereinafter simply referred to as an excitation device) 4 made of a thyristor rectifier. An input end of the excitation device 4 is connected to an in-house power supply system as an excitation power source via an excitation transformer 5, and is configured to convert alternating current power into direct current and supply it to the field winding 2.
AVRIOは、自動電圧調整(AVR)演算部11、ゲ
ートパルス発生部12、界磁電流帰還演算部13を含ん
で形或されている。AVR演算部11は発電機出力電圧
VGを目標とする基準値V REFに一致させるような
界磁制御量に相当する制御信号Vtを生或出力するもの
である。この処理に必要な出力電圧VGは、電機子1の
出力端に接続された電圧変或器(PT)6により検出さ
れる。また、出力電圧Vcと基準電圧VREFとの偏差
ΔVaは、加算器14により求められてAVR演算部↓
1に入力される。AVRIO includes an automatic voltage regulation (AVR) calculation section 11, a gate pulse generation section 12, and a field current feedback calculation section 13. The AVR calculation unit 11 generates or outputs a control signal Vt corresponding to a field control amount that causes the generator output voltage VG to match a target reference value VREF. The output voltage VG required for this process is detected by a voltage transformer (PT) 6 connected to the output terminal of the armature 1. Further, the deviation ΔVa between the output voltage Vc and the reference voltage VREF is obtained by the adder 14 and is obtained by the AVR calculation unit ↓
1 is input.
AVR制御信号Vrは、加算器15を介してゲートハル
ス発生部12に入力される。ゲートパルス発生部12は
、予め定められたv■と点弧角との関係に従った位相タ
イミングを有するゲートパルス信号Paを生成し、励磁
装H4に出力する。The AVR control signal Vr is input to the gate Hals generation section 12 via the adder 15. The gate pulse generator 12 generates a gate pulse signal Pa having a phase timing according to a predetermined relationship between v■ and the firing angle, and outputs it to the excitation device H4.
なお.Vrと点弧角との関係は,励磁電源電圧が一定で
あることを基準として定められている.励磁装置4のサ
イリスタはゲートパルス信号paにより点弧制御され、
これにより上記偏差ΔVaを零にするように界磁電流I
Fが調整される。In addition. The relationship between Vr and firing angle is determined based on the fact that the excitation power supply voltage is constant. The thyristor of the excitation device 4 is controlled to fire by the gate pulse signal pa,
As a result, the field current I is adjusted so that the deviation ΔVa becomes zero.
F is adjusted.
一方、界磁電流帰還演算部13は界磁電流IFを加算器
15を介してAVR制御信号Vlに負帰還し、励磁電源
電圧の変動による界磁電流の変動を微少に抑えるもので
ある。On the other hand, the field current feedback calculation section 13 negatively feeds back the field current IF to the AVR control signal Vl via the adder 15, thereby minimizing fluctuations in the field current due to fluctuations in the excitation power supply voltage.
この負帰還に必要な界磁電流IFは、励磁装置4の1次
側に設けられた変流器(CT)7aと整流器7bからな
る界磁電流検出器7により検出され、界磁電流帰還演算
部13に入力されている。The field current IF required for this negative feedback is detected by a field current detector 7 consisting of a current transformer (CT) 7a and a rectifier 7b provided on the primary side of the excitation device 4, and the field current feedback calculation is performed. The information is input to section 13.
そして演算部13は負帰還信号のゲイン調整と位相調整
を行なって、加算器15の(−)端に入力するようにな
っている。The arithmetic unit 13 performs gain adjustment and phase adjustment on the negative feedback signal, and inputs the resultant signal to the (-) end of the adder 15.
以下、本実施例の詳細構成を動作とともに説明する.
まず.AVHの主ループについて説明する。なお,この
主ループは従来公知と同様の構戊であり、励磁電源電圧
Vrの変動ΔVTによる界磁電流IFの変動ΔIFは,
次式(1)で示すものとなる。The detailed configuration of this embodiment will be explained below along with its operation. first. The main loop of AVH will be explained. Note that this main loop has the same structure as conventionally known, and the fluctuation ΔIF of the field current IF due to the fluctuation ΔVT of the excitation power supply voltage Vr is as follows.
It is expressed by the following formula (1).
ここで、Ka・・・ゲートパルス発生部12のゲインK
t・・・励磁装置4のゲイン
RF・・・界磁巻線の抵抗
式(1)から明らかなように、界磁電流IFは励磁電源
電圧変動ΔVTに比例して変動する。これに応じ、発電
機の出力電圧Vaも変動する。Here, Ka...gain K of the gate pulse generator 12
t...Gain RF of the excitation device 4...Resistance of the field winding As is clear from equation (1), the field current IF varies in proportion to the excitation power supply voltage fluctuation ΔVT. Correspondingly, the output voltage Va of the generator also changes.
これに対し、本実施例の特徴である界磁電流帰還ループ
を設けることにより、式(1)に対応する界磁電流IF
の変動分ΔIFは、次式(2)に示すものとなる。In contrast, by providing a field current feedback loop, which is a feature of this embodiment, the field current IF corresponding to equation (1) is
The variation ΔIF is expressed by the following equation (2).
ここで、KF2・・・界磁電流帰還演算部13のゲイン
VT1・・・変動前の励磁電源電圧(基準化値)VT,
・・・変動後の励磁電源電圧(基準化値)式(2)にお
いて、一般にKG−K丁=2〜3であり、KF2を3程
度とすると、Vtは1近傍であルカらKF, ・KO−
KT−Vtz>1と言える。したがって、ΔIF:Oと
みなすことができ、励磁電源電圧の変動による影響を微
少化できることになる。Here, KF2... Gain of field current feedback calculation unit 13 VT1... Excitation power supply voltage (standardized value) before fluctuation VT,
...In the excitation power supply voltage (standardized value) formula (2) after fluctuation, generally KG - K = 2 to 3, and if KF2 is about 3, Vt is around 1 and from Luke to KF, ・KO-
It can be said that KT-Vtz>1. Therefore, it can be regarded as ΔIF:O, and the influence of fluctuations in the excitation power supply voltage can be minimized.
なお、上述のように、AVR系に界磁電流の負帰還をか
けると、AVR制御信号■lから界磁電流IFに至る制
御系の定状ゲインは、約1/KF,となる.したがって
、主ループの前向きゲインを従来と同一にするために、
AVR演算部l1のゲィンKF,を従来に対しKG−K
T−KF2倍にしてゲインを補償する。As mentioned above, when negative feedback of the field current is applied to the AVR system, the constant gain of the control system from the AVR control signal 1 to the field current IF becomes approximately 1/KF. Therefore, in order to make the forward gain of the main loop the same as before,
The gain KF of the AVR calculation unit l1 is KG-K compared to the conventional one.
Compensate the gain by doubling T-KF.
一方,電力系統の安定度が何らかの原因で低下して電力
動揺が発生すると、電機子反作用により、電力動揺と同
僚相の界磁電流IFの変動が現われる。従来、この変動
はPSSにより抑制するようにされていたが、本実施例
のように.AVR系に界磁電流の負帰還系を設けた場合
は、PSSに依らず、AVRにより電力動揺の安定化を
図ることができる.この場合は、界磁電流帰還演算部1
3の伝達関数F2(S)を次式(3)に示すものとする
。On the other hand, if the stability of the power system decreases for some reason and power fluctuations occur, the power fluctuations and the field current IF of the co-worker phase will fluctuate due to armature reaction. Conventionally, this variation was suppressed by PSS, but as in this embodiment. If a negative feedback system for field current is provided in the AVR system, power fluctuations can be stabilized by the AVR, regardless of PSS. In this case, field current feedback calculation section 1
Assume that the transfer function F2(S) of 3 is shown in the following equation (3).
式(3)の右辺第1項は励磁電源電圧VTの変動除去に
係る要素であり、同第2項は電力動揺の抑制に係る要素
である。第2項の定数T1〜T,は、電力系統安定化及
び過渡特性改善に適した値に選定する。The first term on the right side of equation (3) is an element related to removing fluctuations in the excitation power supply voltage VT, and the second term is an element related to suppressing power fluctuations. The constants T1 to T in the second term are selected to values suitable for stabilizing the power system and improving transient characteristics.
上述のように、本実施例によれば、一つの界磁電流負帰
還ループで、励磁電源電圧の変動による出力電圧制御の
精度向上と、電力動揺の抑制を達或できる。本実施例の
実験によれば、励磁電源電圧VTの変動が30%程度生
じても、出力電圧の制御誤差を0.1%以下に保持でき
た。これは同一条件における従来の制g!JX差の約1
/10以下であり、励磁電源電圧変動に対して十分な制
御精度向上の効果がある。As described above, according to this embodiment, one field current negative feedback loop can improve the accuracy of output voltage control due to fluctuations in excitation power supply voltage and suppress power fluctuations. According to the experiment of this embodiment, even if the excitation power supply voltage VT fluctuated by about 30%, the control error of the output voltage could be kept at 0.1% or less. This is the conventional control g! under the same conditions. Approximately 1 difference in JX
/10 or less, which has the effect of sufficiently improving control accuracy against excitation power supply voltage fluctuations.
また、合せて電力動揺の制御効果があることから,高信
頼性を有し、かつ安価な励磁制御装置を実現できる。In addition, since there is an effect of controlling power fluctuation, a highly reliable and inexpensive excitation control device can be realized.
なお、第1図実施例では、負帰還信号として界磁電流I
Fを用いたが、これに代えて界磁電圧VFを用いても制
御誤差に対しては同一の効果を得ることができる。しか
し、界磁電圧VFを用いる場合は、検出部に用いる変換
器が高耐圧、高リップルの特殊なものとなること、また
界磁抵抗RFの温度変動を考慮しなければならないこと
等の不利がある。In the embodiment shown in FIG. 1, the field current I is used as the negative feedback signal.
Although F is used, the same effect on control errors can be obtained by using the field voltage VF instead. However, when using the field voltage VF, there are disadvantages such as the need for a special converter with high withstand voltage and high ripple for the detection unit, and the need to take into account temperature fluctuations in the field resistance RF. be.
また、界磁電流IPの検出は、励磁装置4の2次側の直
流回路にシャント抵抗を挿入して行なうことも可能であ
る。The field current IP can also be detected by inserting a shunt resistor into the DC circuit on the secondary side of the excitation device 4.
また、界磁電流検出器7又は界磁電流帰還演算部l3自
体の故障等により、負帰還量が異常になった場合の影響
を極小化するため、界磁電流帰還演算部13の出力端に
リミッタを設けることが望ましい。さらに、そのような
界磁電流帰還系の故障は、実質的にAVR系の前向きゲ
インを増大させるから,制御誤差は変化しないが制御系
が不安定となるので、故障等の異常検出によりAVR演
算部11のゲインを界磁電流負帰還なしの条件に低減さ
せることが望ましい。In addition, in order to minimize the influence when the amount of negative feedback becomes abnormal due to a failure of the field current detector 7 or the field current feedback calculation unit 13 itself, the output terminal of the field current feedback calculation unit 13 is It is desirable to provide a limiter. Furthermore, such a failure in the field current feedback system will substantially increase the forward gain of the AVR system, so although the control error will not change, the control system will become unstable. It is desirable to reduce the gain of the section 11 to a condition without negative field current feedback.
また、AVR7ではデジタル計算機を用いて構威するこ
とができる.これによれば、ノイズなどの外乱の影響を
受けることがなく、またゲインの変更が容易に行なえる
という利点がある。Additionally, AVR7 can be configured using a digital computer. This has the advantage that it is not affected by disturbances such as noise and that the gain can be easily changed.
また,第1図実施例では、励磁電源を所内電源から得る
例について示したが、第2図に示すように当該発電機か
ら直接得るようにする場合に適用しても同一の効果を得
ることができる。また、発電機が超伝導発電機であって
も当然適用可能である。In addition, although the example shown in FIG. 1 shows an example in which the excitation power source is obtained from the in-house power supply, the same effect can be obtained even if the excitation power source is obtained directly from the generator as shown in FIG. I can do it. Furthermore, it is naturally applicable even if the generator is a superconducting generator.
第3図に本発明の他の実施例の全体構或図を示す。第1
図実施例は、励磁電源電圧の変動ΔVTによる影響を、
界磁電流IFの負帰還により補償するものであった。本
実施例は、励磁電源電圧の変動ΔVTに合わせてサイリ
スタの点弧角を直接的に補正して補償しようとするもの
である。FIG. 3 shows the overall structure of another embodiment of the present invention. 1st
The example shown in the figure shows the influence of the excitation power supply voltage fluctuation ΔVT,
This was compensated by negative feedback of the field current IF. This embodiment attempts to compensate by directly correcting the firing angle of the thyristor in accordance with the fluctuation ΔVT of the excitation power supply voltage.
しかして、本実施例では、第3図に示すように、励磁変
圧器2次側の電圧を電圧変或器8により検出し、加算器
9により検出電圧VTと基準電圧VTREFの偏差ΔV
Tを求め、これに応じて点弧角すなわちゲートバルスP
aの位相を補正して界磁電流IFをVIに応じた値に制
御するようにしている。Therefore, in this embodiment, as shown in FIG.
T is determined, and the firing angle, that is, the gate pulse P, is determined accordingly.
The field current IF is controlled to a value corresponding to VI by correcting the phase of a.
したがって、本実施例によれば、励磁電源電圧が変動し
ても、AVR制御信号Vrに応じた界磁電流IFに制御
することが可能となり、制御精度を向上させることがで
きる。Therefore, according to this embodiment, even if the excitation power supply voltage fluctuates, it is possible to control the field current IF according to the AVR control signal Vr, and it is possible to improve control accuracy.
以上説明したように、本発明によれば、励磁電源電圧に
応じて変動する界磁電流等の界磁励磁系の物理量を検出
し、この検出物理量を負帰還してAVR制御信号を補正
するようにしていることから、励磁電源電圧の変動に起
因する界磁電流の変動を微小にすることができ、A V
R IIJ御精度を向゛上ずることができる。As explained above, according to the present invention, the physical quantity of the field excitation system such as the field current that fluctuates depending on the excitation power supply voltage is detected, and the detected physical quantity is negatively fed back to correct the AVR control signal. Therefore, fluctuations in the field current caused by fluctuations in the excitation power supply voltage can be minimized, and A V
RIIJ control accuracy can be improved.
また、上記負帰還系の伝達関数に電力動揺抑制に適した
要素を加味したものによれば、AVRで合わせて電力動
拙を抑制することができ、高信頼性で安価な励磁制御装
置を実現できる。In addition, by adding elements suitable for suppressing power fluctuation to the transfer function of the negative feedback system described above, it is possible to suppress power fluctuation together with AVR, realizing a highly reliable and inexpensive excitation control device. can.
また、励磁電源電圧の変動を検出し、この検出値に応じ
て励磁装置のサイリスタ等のスイッチ素子の導通角を補
正制御するようにしたものによれば,簡単な構或で励磁
電源電圧の変動による界磁電流の変動を微小にすること
ができ、A V R制御精度を向上することができる。In addition, with a device that detects fluctuations in the excitation power supply voltage and corrects and controls the conduction angle of a switching element such as a thyristor of the excitation device according to the detected value, it is possible to detect fluctuations in the excitation power supply voltage with a simple structure. Therefore, fluctuations in the field current caused by this can be made minute, and AVR control accuracy can be improved.
第1図は本発明が適用された一実施例励磁装置の全体構
或図、第2図は第l図実施例の変形例の構成図、第3図
は本発明の他の実施例の全体構戊図である。
■・・電機子、
2・・界磁巻線、
4・・励磁装置本体、
5・・・励磁変圧器、
6・・・電圧変或器、
7・・・電流検出器、
10・・・自動電圧調整装置(AVR)L1・・・AV
R演算部、
12・・・ゲートパルス発生部、
l3・・・界磁電流帰還演算部。Fig. 1 is a diagram showing the overall structure of an excitation device according to an embodiment of the present invention, Fig. 2 is a block diagram of a modified example of the embodiment shown in Fig. 1, and Fig. 3 is an overall diagram of another embodiment of the present invention. This is a schematic diagram. ■... Armature, 2... Field winding, 4... Excitation device body, 5... Excitation transformer, 6... Voltage transformer, 7... Current detector, 10... Automatic voltage regulator (AVR) L1...AV
R calculation unit, 12... Gate pulse generation unit, l3... Field current feedback calculation unit.
Claims (1)
の偏差が零になるように発電機の界磁制御を行なうこと
を含んでなる発電機の励磁方法において、発電機の界磁
電流又は界磁電流に相当する電気量を検出し、この検出
値を負帰還して界磁制御量を補正することを特徴とする
発電機の励磁方法。 2、前記界磁制御量の補正が、励磁電源電圧の変動を抑
制する補正量に定められた請求項1記載の発電機の励磁
方法。 3、前記界磁制御量の補正が、励磁電源電圧の変動およ
び電力系統の動揺を抑制する補正量に定められた請求項
1記載の発電機の励磁方法。 4、発電機の出力電圧を基準電圧に励磁させるべく、発
電機の界磁制御量を決定する自動電圧調整手段を有して
なる発電機の励磁装置において、発電機の界磁電流又は
これに相当する電気量を検出する界磁電流検出手段と、
この検出量を負帰還して前記界磁制御量を補正する界磁
電流帰還補正手段を設けたことを特徴とする発電機の励
磁装置。 5、前記界磁電流帰還補正手段は、その伝達関数が前記
励磁装置の電源電圧変動を抑制する要素と、電力系統の
動揺を抑制する要素の少なくとも一方を含んでなるもの
とした請求項4記載の発電機の励磁装置。 6、励磁装置本体と、自動電圧調整装置とを備え、前記
自動電圧調整装置は、発電機の出力電圧を入力し、この
出力電圧を基準電圧に一致させるようにその偏差に応じ
た界磁制御量を決定するものとされ、 前記励磁装置本体は、前記界磁制御量を入力し、この界
磁制御量に応じた界磁電流を発電機に供給するものとさ
れた発電機の励磁装置において、 発電機の界磁電流又はこれに相当する電気量を検出する
界磁電流検出手段を有し、 前記励磁装置本体は、サイリスタ等のスイッチング素子
から形成された電力変換装置とされ、前記自動電圧調整
手段は、自動電圧調整演算部と、ゲートパルス発生部と
、界磁電流帰還演算部とを有し、 前記自動電圧調整演算部は、発電機の出力電圧と基準電
圧の偏差を入力し、この偏差を零にするに必要な界磁制
御量を決定するものとされ、前記界磁電流帰還演算部は
、前記界磁電流検出手段の検出値を入力し、この検出値
に基づいて前記界磁制御量の補正量を決定するものとさ
れ、 前記ゲートパルス発生部は、前記界磁制御量から前記補
正量を減算した界磁制御量を入力し、この補正後の制御
量に基づいて前記励磁装置本体のスイッチング素子の点
弧角を制御するゲートパルスを生成するものとされてな
る発電機の励磁装置。 7、発電機の出力電圧を基準電圧に一致させるように、
その偏差に応じて発電機の界磁制御を行なうことを含ん
でなる発電機の励磁方法において、 前記界磁電力を供給する励磁電源電圧の変動量を検出し
、この検出変動量を零にすべく前記界磁制御量を補正す
ることを特徴とする発電機の励磁方法。 8、励磁装置本体と、自動電圧調整装置とを備え、前記
自動電圧調整装置は、発電機の出力電圧を入力し、この
出力電圧を基準電圧に一致させるようにその偏差に応じ
た界磁制御量を決定するものとされ、 前記励磁装置本体は、前記界磁制御量を入力し、この界
磁制御量に応じた界磁電流を発電機に供給するものとさ
れた発電機の励磁装置において、 前記励磁装置本体の電源電圧の変動を検出し、この電源
電圧の変動による界磁電流の変動を低減するように前記
界磁制御量を補正する手段を設けたことを特徴とする発
電機の励磁装置。 9、前記励磁装置本体が、サイリスタ等のスイッチング
素子からなる電力変換装置とされ、 前記自動電圧調整装置により決定される界磁制御量が、
前記スイッチング素子の点弧制御信号とされ、 前記界磁制御量の補正手段は、前記励磁電源電圧の変動
に応じて前記点弧制御信号の点弧位相を補正するものと
されたことを特徴とする請求項8記載の発電機の励磁装
置。 10、請求項1乃至9項いずれかに記載の発電機の励磁
方法又は励磁装置が用いられてなる発電装置。[Claims] 1. A generator excitation method comprising detecting a deviation between the output voltage of the generator and a reference voltage, and controlling the generator's field so that the deviation becomes zero. A method for exciting a generator, characterized by detecting a field current of the machine or an amount of electricity corresponding to the field current, and correcting a field control amount by negative feedback of the detected value. 2. The generator excitation method according to claim 1, wherein the correction of the field control amount is determined to be a correction amount that suppresses fluctuations in the excitation power supply voltage. 3. The generator excitation method according to claim 1, wherein the correction of the field control amount is determined to be a correction amount that suppresses fluctuations in the excitation power supply voltage and fluctuations in the power system. 4. In a generator excitation device comprising automatic voltage adjustment means that determines the field control amount of the generator in order to excite the output voltage of the generator to the reference voltage, the generator field current or equivalent thereof is used. a field current detection means for detecting an amount of electricity;
An excitation device for a generator, comprising field current feedback correction means for correcting the field control amount by negative feedback of the detected amount. 5. The field current feedback correction means has a transfer function that includes at least one of an element for suppressing fluctuations in the power supply voltage of the excitation device and an element for suppressing fluctuations in the electric power system. generator exciter. 6. An excitation device body and an automatic voltage adjustment device, the automatic voltage adjustment device inputting the output voltage of the generator, and controlling the field control amount according to the deviation so that the output voltage matches the reference voltage. In the excitation device for a generator, the excitation device main body inputs the field control amount and supplies a field current to the generator according to the field control amount. It has a field current detection means for detecting a current or an amount of electricity equivalent thereto, the excitation device main body is a power conversion device formed from a switching element such as a thyristor, and the automatic voltage adjustment means has an automatic voltage adjustment means. It has an adjustment calculation section, a gate pulse generation section, and a field current feedback calculation section, and the automatic voltage adjustment calculation section inputs a deviation between the output voltage of the generator and a reference voltage, and makes this deviation zero. The field current feedback calculation unit inputs the detection value of the field current detection means and determines the correction amount of the field control amount based on this detection value. The gate pulse generator inputs a field control amount obtained by subtracting the correction amount from the field control amount, and controls the firing angle of the switching element of the exciter main body based on the corrected control amount. An excitation device for a generator that generates pulses. 7. To match the output voltage of the generator with the reference voltage,
In a method for excitation of a generator, which includes controlling the field of the generator in accordance with the deviation, the amount of variation in the excitation power supply voltage that supplies the field power is detected, and the amount of variation in the excitation power source voltage that supplies the field power is detected, and the amount of variation is adjusted to A generator excitation method characterized by correcting a field control amount. 8. An excitation device body and an automatic voltage adjustment device, the automatic voltage adjustment device inputting the output voltage of the generator, and controlling the field control amount according to the deviation so that the output voltage matches the reference voltage. In the excitation device for a generator, the excitation device main body inputs the field control amount and supplies a field current to the generator according to the field control amount, wherein the excitation device main body 1. An excitation device for a generator, comprising means for detecting fluctuations in power supply voltage and correcting the field control amount so as to reduce fluctuations in field current due to fluctuations in power supply voltage. 9. The excitation device main body is a power conversion device consisting of a switching element such as a thyristor, and the field control amount determined by the automatic voltage regulator is:
the ignition control signal for the switching element, and the field control amount correction means corrects the ignition phase of the ignition control signal in accordance with fluctuations in the excitation power supply voltage. Item 8. Excitation device for a generator according to item 8. 10. A power generator using the generator excitation method or excitation device according to any one of claims 1 to 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1189029A JPH0356100A (en) | 1989-07-21 | 1989-07-21 | Exciting method and exciting equipment of generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1189029A JPH0356100A (en) | 1989-07-21 | 1989-07-21 | Exciting method and exciting equipment of generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0356100A true JPH0356100A (en) | 1991-03-11 |
Family
ID=16234105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1189029A Pending JPH0356100A (en) | 1989-07-21 | 1989-07-21 | Exciting method and exciting equipment of generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0356100A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0647318A (en) * | 1992-05-27 | 1994-02-22 | Ransburg Corp | Hand-held coating spray gun |
JP2004048915A (en) * | 2002-07-12 | 2004-02-12 | Tohoku Electric Power Co Inc | Power system stabilization control system |
JP2022049229A (en) * | 2020-09-16 | 2022-03-29 | 三菱重工業株式会社 | Field control device and field control method of synchronous machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52155309A (en) * | 1976-06-21 | 1977-12-23 | Hitachi Ltd | Exciter for synchronous machine |
JPS58182499A (en) * | 1982-04-19 | 1983-10-25 | Hitachi Ltd | Excitation controlling unit for synchronous machine |
JPS61185100A (en) * | 1985-02-12 | 1986-08-18 | Mitsubishi Electric Corp | Digital excitation controller of generator |
-
1989
- 1989-07-21 JP JP1189029A patent/JPH0356100A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52155309A (en) * | 1976-06-21 | 1977-12-23 | Hitachi Ltd | Exciter for synchronous machine |
JPS58182499A (en) * | 1982-04-19 | 1983-10-25 | Hitachi Ltd | Excitation controlling unit for synchronous machine |
JPS61185100A (en) * | 1985-02-12 | 1986-08-18 | Mitsubishi Electric Corp | Digital excitation controller of generator |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0647318A (en) * | 1992-05-27 | 1994-02-22 | Ransburg Corp | Hand-held coating spray gun |
JP2004048915A (en) * | 2002-07-12 | 2004-02-12 | Tohoku Electric Power Co Inc | Power system stabilization control system |
JP2022049229A (en) * | 2020-09-16 | 2022-03-29 | 三菱重工業株式会社 | Field control device and field control method of synchronous machine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2000156975A (en) | Dc-to-dc converter | |
US8237426B2 (en) | Flux linkage compensator for uninterruptible power supply | |
JPH0356100A (en) | Exciting method and exciting equipment of generator | |
US4446414A (en) | Terminal voltage limit regulator for a load commutated inverter | |
EP0146876B1 (en) | Antisaturation control for x-ray generator inverter | |
US20040119437A1 (en) | Excitation controller | |
JPH08223920A (en) | Method and apparatus for control of comparator, and correction method of converter ac current used for them | |
JP2809833B2 (en) | Excitation controller for synchronous machine | |
JP3075578B2 (en) | Reactive power compensator | |
JP3068897B2 (en) | Automatic power factor adjustment device | |
JP2581459Y2 (en) | Control method of voltage fluctuation suppression device | |
JP2535210B2 (en) | Synchronous generator automatic voltage regulator | |
JPH0923585A (en) | Control of reactive power compensation | |
JP2792085B2 (en) | Control method of reactive power compensator | |
JPH0736138B2 (en) | Reactive power compensator | |
JPH0615115U (en) | Control system of reactive power compensator | |
JPH1080199A (en) | Automatic voltage regulator of synchronous generator | |
JPH09154284A (en) | Power converter controller | |
JPH0642183B2 (en) | Coordinated operation control system of reactive power compensator | |
SU307393A1 (en) | DC VOLTAGE STABILIZER | |
JPH0833778B2 (en) | Electromagnet coil power supply | |
JPH05190278A (en) | Dc arc furnace power supply device | |
SU987783A1 (en) | Frequency converter control method | |
JPH062000B2 (en) | Excitation control device for synchronous generator | |
JPH0731301Y2 (en) | Controller for reactive power compensator |