JP2633842B2 - Power system stabilizer - Google Patents
Power system stabilizerInfo
- Publication number
- JP2633842B2 JP2633842B2 JP61276562A JP27656286A JP2633842B2 JP 2633842 B2 JP2633842 B2 JP 2633842B2 JP 61276562 A JP61276562 A JP 61276562A JP 27656286 A JP27656286 A JP 27656286A JP 2633842 B2 JP2633842 B2 JP 2633842B2
- Authority
- JP
- Japan
- Prior art keywords
- power system
- generator
- power
- state
- 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 - Fee Related
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、電力系統安定化装置に係り、特に発電機が
接続された電力系統の優勢固有値の安定条件まで考慮に
入れた、動的定態安定度を向上させるのに好適な電力系
統安定化装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric power system stabilizing device, and more particularly, to a dynamic constant stabilizing system that takes into account a stable condition of a dominant eigenvalue of an electric power system connected to a generator. The present invention relates to a power system stabilizing device suitable for improving state stability.
従来の装置は、特公昭61−3200号公報に記載のよう
に、発電機の出力電流の無効分を検出し、その値があら
かじめ設定された値をこえた場合のみ、電力系統安定化
回路の制御信号を自動電圧調整器に伝送していた。As described in JP-B-61-3200, the conventional device detects an ineffective component of the output current of the generator, and only when the value exceeds a preset value, does the power system stabilization circuit The control signal was transmitted to the automatic voltage regulator.
しかし、上記従来技術は、発電機運転条件によって動
特性の安定余裕を示す優勢固有値が変動することについ
て配慮がされておらず、発電機の安定運用の範囲が狭く
なるという問題があった。However, the above-mentioned prior art does not take into account the fact that the dominant eigenvalue indicating the stability margin of the dynamic characteristics fluctuates depending on the operating conditions of the generator, and has a problem that the range of stable operation of the generator is narrowed.
本発明の目的は、発電機運転状態によって系統安定化
装置PSS（パワーシステムスタビライザPower System St
abilizer）の制御定数を変更制御するようにして、上記
不具合をなくすことにある。An object of the present invention is to provide a system stabilizing device PSS (Power System Stabilizer) depending on a generator operation state.
The above-mentioned problem is eliminated by changing and controlling the control constant of the abilizer.
上記目的を達成するために、本発明では電力系統に接
続された発電機の出力状態を調整する発電機励磁制御装
置に付置し、この発電機励磁制御装置を制御する制御定
数信号を出力する電力系統安定化装置において、電力系
統の電力状態を検出する電力状態検出手段と、この電力
状態検出手段が検出した電力系統状態と、電力系統の動
特性を示している優勢固有値の許容値関係を監視して、
発電機の出力状態が優勢固有値の許容値範囲内に入るよ
うに、制御定数信号を出力する制御定数信号出力手段を
備えたようにしたものである。In order to achieve the above object, according to the present invention, an electric power output to a generator excitation control device for adjusting an output state of a generator connected to an electric power system and outputting a control constant signal for controlling the generator excitation control device is provided. In a power system stabilizing device, a power state detecting means for detecting a power state of a power system, and a power system state detected by the power state detecting means and a permissible value relationship of a dominant eigenvalue indicating a dynamic characteristic of the power system are monitored. do it,
A control constant signal output means for outputting a control constant signal so that the output state of the generator falls within the allowable value range of the dominant eigenvalue is provided.
本発明の電力系統安定化装置によれば、電力系統の動
特性を示している優勢固有値の状態も考慮して、発電機
出力状態を制御するので、発電機の運転状態を正確に、
かつ十分な安定余裕度を持たせた状態にすることができ
る。According to the power system stabilization device of the present invention, the generator output state is controlled in consideration of the state of the dominant eigenvalue indicating the dynamic characteristic of the power system, so that the operation state of the generator is accurately determined.
In addition, a state where a sufficient stability margin is provided can be obtained.
以下、本発明の一実施例を第１図〜第３図により説明
する。An embodiment of the present invention will be described below with reference to FIGS.
第１図は、本発明の一実施例の要部構成を示すブロッ
ク図、第２図は、全体構成図である。FIG. 1 is a block diagram showing a main part configuration of an embodiment of the present invention, and FIG. 2 is an overall configuration diagram.
第２図において、Genは発電機、Ｂは発電機端子、PT
は発電機端子Ｂに接続され電力系統の電力状態を検出す
る電圧変成器、Ｖはその出力、CTは同じく電力状態を検
出する電流変成器、IGはその出力、PQは前記のＶとＩと
を入力し、有効電力PGと無効電力QGを算出する電力算出
回路、AVRは自動電圧調整器、PSSは系統安定化回路であ
る。In FIG. 2, Gen is a generator, B is a generator terminal, PT
Is a voltage transformer connected to the generator terminal B to detect the power state of the power system, V is its output, CT is a current transformer that also detects the power state, IG is its output, and PQ is the above V and I. , And a power calculation circuit that calculates the active power PG and the reactive power QG, AVR is an automatic voltage regulator, and PSS is a system stabilization circuit.
第１図は、第２図における系統安定化回路、PSSで使
用される制御定数のゲインKpを求めるための制御定数回
路で、QGは前記電力算出回路PQの出力のうち無効電力で
ある。BPFは無効電力の変動のうち低周波成分のみ通過
させるバンドパスフィタ、DKQは無効電力成分の状態を
検出して、優勢固有値の存在範囲を下限値と、上限値と
の間で運転されるようにPSSのゲインを微小変化させる
ための微係数出力手段であり、この出力はΔKPOであ
る。KPOはPSSの初期ゲインであり、ADDIは前記ΔKPOとK
POとを加算する加算器である。FIG. 1 shows a system stabilizing circuit in FIG. 2 and a control constant circuit for obtaining a gain Kp of a control constant used in a PSS, and QG is a reactive power in the output of the power calculating circuit PQ. BPF is a band-pass filter that allows only low-frequency components of the fluctuations in reactive power to pass.DKQ detects the state of the reactive power components and operates so that the existence range of the dominant eigenvalue is between the lower limit and the upper limit. Is a differential coefficient output means for slightly changing the gain of the PSS, and this output is ΔK PO . K PO is the initial gain of PSS, and ADDI is ΔK PO and K
This is an adder that adds PO .
第３図は、発電機励磁制御ブロック図である。COMPは
位相補償回路であり、この出力ΔVrは基準値補正項であ
り、Vrefは、基準電圧値であり、ADD2はこれらVrefとΔ
VrとＶとの加算を行う加算回路である。AVRは加算回路A
DD2の出力に応じて発電機の励磁量を制御する自動電圧
調整器であり、この出力が界磁電圧Efdである。FIG. 3 is a generator excitation control block diagram. COMP is a phase compensation circuit, the output ΔVr is a reference value correction term, V ref is a reference voltage value, and ADD2 is V ref and Δ
This is an addition circuit for adding Vr and V. AVR is adder A
This is an automatic voltage regulator that controls the amount of excitation of the generator according to the output of DD2, and this output is the field voltage E fd .
次に、第４図と特性曲線を参照して、第１図の実施例
を説明する。Next, the embodiment of FIG. 1 will be described with reference to FIG. 4 and a characteristic curve.
第４図は、電力系統の動特性を支配している優勢固有
値の軌跡の例を示している。この図では、パラメータの
うち、発電機運転条件として曲線l1（遅相運転），曲線
l2（力率１運転），曲線l3（進相運転）を例にとり、そ
れぞれについてPSSの制御定数であるゲインを例えばk1,
k2,k3の値に変化させたときの優勢固有値の軌跡であ
る。FIG. 4 shows an example of a locus of a dominant eigenvalue that governs the dynamic characteristics of the power system. In this figure, among the parameters, the curve l 1 (slow operation) and the curve
l 2 (power factor 1 operation), curve l 3 (phase advance operation) is taken as an example, the gain, for example, k 1 is a control constant of the PSS for each of
It is a locus of a dominant eigenvalue when it is changed to the values of k 2 and k 3 .
この図において、優勢固有値の存在範囲を下限値σＬ
と上限値σＵとの間で運転するものとする。In this figure, the existence range of the dominant eigenvalue is defined as a lower limit σ L
It shall be operated between the upper limit value sigma U.
いま、この電力系統が発電機運転条件が曲線l2で、PS
Sゲインが曲線k2との交点Ａで運転が行われているもの
と仮定する。Now, this power system is a generator operating conditions in the curve l 2, PS
Assume that S gain operated at the intersection A between the curve k 2 is being performed.
ここで、運転条件が曲線l2のように変化すると、これ
に伴って優勢固有値は曲線k2上を点Ａから点Ｂに向けて
移行し、安定度が減少する。そして、上限度σＵを超え
てしまう。これにより、第１図の微係数出力手段DKQか
らの出力によりPSSゲイン増の出力が生ずる。この出力
が加算されてPSSのゲインKpが修正される。このとき、
優勢固有値は曲線l2上を点Ｂから点Ｃへ移動し、設定目
標を満足する。Here, the operating conditions when changes as a curve l 2, which migrated towards the dominant eigenvalues point on the curve k 2 from point A B along with, stability decreases. Then, the upper limit σ U is exceeded. As a result, the output from the differential coefficient output means DKQ shown in FIG. This output is added to correct the gain Kp of the PSS. At this time,
Dominant eigenvalues on curve l 2 moves from point B to point C, and satisfies the set target.
次に、発電機運転条件の曲線l2に回復した場合の第１
図の実施例の動作としては、優勢固有値は曲線k3上を点
Ｃから点Ｄに向けて移行するようになる。この場合も設
定目標を満足している。Next, the case where the recovered curve l 2 of the generator operating conditions 1
The operation of the embodiment of FIG, dominant eigenvalue is as shifts toward the point D on the curve k 3 from the point C. In this case, the target is satisfied.
さらに、発電機運転条件が曲線l1に変化した場合、優
勢固有値は曲線k3上を点Ｄから点Ｅに向けて移行する。
点Ｅは設定目標の下限値σＬを超えている。これによ
り、第１図の感度係数DKQの出力によりPSSゲイン減の出
力を生ずる。この出力が減算されてPSSゲインが修正さ
れる。このとき、優勢固有値は曲線l1上を点Ｅから点Ｐ
へ移動し、設定目標を満足する。Further, if the generator operating condition changes to the curve l 1, the dominant eigenvalue moves toward the point E on the curve k 3 from point D.
Point E exceeds the lower limit value σ L of the set target. Thus, the output of the sensitivity coefficient DKQ shown in FIG. This output is subtracted to correct the PSS gain. At this time, the dominant eigenvalues point on the curve l 1 from the point E P
Go to and meet the set goals.
以上の実施例では、制御定数としてPSSゲインを変更
した例について説明したが、PSSの他のゲイン又は時定
数を変更しても同様の効果を得る。In the above embodiment, an example in which the PSS gain is changed as the control constant has been described. However, the same effect can be obtained by changing another gain or time constant of the PSS.
また、無効電力の代りに有効電力の変動に応じて、PS
S制御定数を変更制御しても良い。Also, according to the fluctuation of active power instead of reactive power, PS
The S control constant may be changed and controlled.
本発明によれば、発電機運転条件の変動に伴って、PS
S制御定数を変更制御することにより、電力系統の動的
特性も考慮して、運転状態に十分な余裕を持たせながら
発電機出力状態を制御することが可能になる。According to the present invention, with the fluctuation of the generator operating conditions, PS
By changing and controlling the S control constant, it is possible to control the generator output state while giving a sufficient margin to the operation state in consideration of the dynamic characteristics of the power system.
第１図は本発明の一実施例の要部構成図、第２図は本発
明の一実施例の全体構成図、第３図は発電機励磁制御系
モデルブロック図、第４図は発電機運転条件とPSSゲイ
ンを変えたときの優勢固有値の軌跡図である。 DKQ……感度係数、BPF……バンドパスフィルタ、Ｑ……
無効電力、KPO……PSSの初期ゲイン、KP……修正後のPS
Sゲイン。FIG. 1 is a block diagram of a main part of one embodiment of the present invention, FIG. 2 is an overall block diagram of one embodiment of the present invention, FIG. 3 is a block diagram of a generator excitation control system model, and FIG. FIG. 6 is a trajectory diagram of a dominant eigenvalue when an operating condition and a PSS gain are changed. DKQ …… Sensitivity coefficient, BPF …… Band pass filter, Q ……
Reactive power, K PO …… PSS initial gain, K P …… PS after correction
S gain.
Claims (1)
調整する発電機励磁制御装置に付置し、該発電機励磁制
御装置を制御する制御定数信号を出力する電力系統安定
化装置において、前記電力系統の電力状態を検出する電
力状態検出手段と、該電力状態検出手段が検出した電力
系統状態と、前記電力系統の動特性を示している優勢固
有値の許容値関係を監視して、前記発電機の出力状態が
前記優勢固有値の許容値範囲内に入るように、前記制御
定数信号を出力する制御定数信号出力手段を備えたこと
を特徴とする電力系統安定化装置。1. A power system stabilizing device which is attached to a generator excitation control device for adjusting an output state of a generator connected to a power system and outputs a control constant signal for controlling the generator excitation control device. Power state detection means for detecting the power state of the power system, and the power system state detected by the power state detection means, monitoring the permissible value relationship of the dominant eigenvalue indicating the dynamic characteristics of the power system, An electric power system stabilizing device comprising: a control constant signal output unit that outputs the control constant signal so that an output state of a generator falls within an allowable value range of the dominant eigenvalue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61276562A JP2633842B2 (en) | 1986-11-21 | 1986-11-21 | Power system stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61276562A JP2633842B2 (en) | 1986-11-21 | 1986-11-21 | Power system stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63133835A JPS63133835A (en) | 1988-06-06 |
| JP2633842B2 true JP2633842B2 (en) | 1997-07-23 |
Family
ID=17571219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61276562A Expired - Fee Related JP2633842B2 (en) | 1986-11-21 | 1986-11-21 | Power system stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2633842B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5762757B2 (en) * | 2011-01-20 | 2015-08-12 | 株式会社東芝 | Solar power system |
| AU2011355888B2 (en) | 2011-01-20 | 2015-07-16 | Kabushiki Kaisha Toshiba | Photovoltaic system and power supply system |
| JP2012170192A (en) * | 2011-02-10 | 2012-09-06 | Toshiba Corp | Power feed system |
| WO2014196364A1 (en) * | 2013-06-05 | 2014-12-11 | 富士電機株式会社 | Power stabilization system and control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55109198A (en) * | 1979-02-15 | 1980-08-22 | Mitsubishi Electric Corp | Power system stabilizer |
| JPS59230429A (en) * | 1983-06-08 | 1984-12-25 | 四国電力株式会社 | System stabilizer |
-
1986
- 1986-11-21 JP JP61276562A patent/JP2633842B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63133835A (en) | 1988-06-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |