电气自动化
電氣自動化
전기자동화
ELECTRICAL AUTOMATION
2014年
5期
9-11
,共3页
励磁控制%LOEC%鲁棒性%大扰动%暂态稳定性%最优控制%多变量控制
勵磁控製%LOEC%魯棒性%大擾動%暫態穩定性%最優控製%多變量控製
려자공제%LOEC%로봉성%대우동%잠태은정성%최우공제%다변량공제
excitation control%LOEC%robustness%large disturbance%transient stability%optimal control%multi-variable control
LOEC考虑了电力系统多个控制目标的综合，并采用最优化设计，因而在平衡点附近具有较好的动态性能和适应性，但当扰动过大时，系统性能将变差，同时控制缺少对端电压的控制。提出了具有宽适应范围的励磁控制系统的最优励磁控制器。设计方法对变量的选择进行了改变，以转速偏差微分代替了常用最优励磁控制系统的电磁功率偏差，并增加对端电压的控制。改进后的励磁控制系统适应性得到提高。仿真计算结果表明，改进的励磁控制器具有调节范围宽，抗扰动性强的特点。
LOEC攷慮瞭電力繫統多箇控製目標的綜閤，併採用最優化設計，因而在平衡點附近具有較好的動態性能和適應性，但噹擾動過大時，繫統性能將變差，同時控製缺少對耑電壓的控製。提齣瞭具有寬適應範圍的勵磁控製繫統的最優勵磁控製器。設計方法對變量的選擇進行瞭改變，以轉速偏差微分代替瞭常用最優勵磁控製繫統的電磁功率偏差，併增加對耑電壓的控製。改進後的勵磁控製繫統適應性得到提高。倣真計算結果錶明，改進的勵磁控製器具有調節範圍寬，抗擾動性彊的特點。
LOEC고필료전력계통다개공제목표적종합，병채용최우화설계，인이재평형점부근구유교호적동태성능화괄응성，단당우동과대시，계통성능장변차，동시공제결소대단전압적공제。제출료구유관괄응범위적려자공제계통적최우려자공제기。설계방법대변량적선택진행료개변，이전속편차미분대체료상용최우려자공제계통적전자공솔편차，병증가대단전압적공제。개진후적려자공제계통괄응성득도제고。방진계산결과표명，개진적려자공제기구유조절범위관，항우동성강적특점。
As LOEC (linear optimal excitation control)takes the integration of multiple of control targets of the power system and adopts an optimal design,it has good dynamic performance and adaptability in the vicinity of the equilibrium point.In case of severe disturbance,however,the system performance will be deteriorated and there is little control over the terminal voltage.This paper presents an optimal excitation controller of a wide range of adaptation for the excitation control system.Selection of variables is changed in the design method in that excitation power deviation in normal optimal excitation control system is replaced by speed deviation differentiation,and control of terminal voltage is added.The improved excitation control system has better adaptability.The simulation results show that the improved excitation controller is characteristic of a wide range of regulation and high resistance of disturbance.
