摘要
在输入限幅条件下讨论电力系统励磁控制器的设计问题。基于对线性最优励磁控制器输出越限的原因及其对闭环系统影响的分析 ,提出一种逐段线性二次型控制策略 ,它能保证当系统运行于预定区域内时控制输出不越限 ,而在该区域以外能充分利用控制作用将其尽快拉入非限幅区。数字仿真表明 ,所设计的控制器能很好地满足系统的暂态和稳态性能要求。
The problem of designing power system excitation controller in the presence of input constraint is presented in this paper. Based on the two analyses on the reason that the output of linear optimal excitation controller exceeds the limit and on the influence of output overexertion on closed loop system, a piece wise linear quadratic control scheme is proposed. This scheme can ensure that the output of the controller [WT5”,6BZ]does not exceed the limit while the system is operating in the predefined area, and the output can be pulled into the non constraint region by the control action while the system is operating in the area beyond the predefined one. Digital simulation shows that the developed controller can well improve the transient and steady state performance of power system.
出处
《电网技术》
EI
CSCD
北大核心
2000年第10期1-5,共5页
Power System Technology
基金
国家自然科学基金资助项目!( 5 98770 11)
关键词
励磁控制
线性二次型控制
输入限幅
电力系统
excitation control
linear quadratic control
input constraint
Lyapunov ellipsoid
