摘要
应用基于同步相量测量单元的广域测量系统进行广域控制时,反馈信号的传输时延是不能忽略的。作者根据实际电力系统的特点构造了部分状态含时延的状态反馈控制器,应用线性矩阵不等式理论提出了时滞依赖的稳定性条件,根据该条件不仅能得到保证系统稳定的控制器,而且可以得到保证系统稳定的最大允许时间延迟。最后以4机系统为例,用时域仿真的结果说明所得控制器的性能及该方法的有效性。
The transmission time delay cannot be neglected while wide area measurement system （WAMS） based on synchronous phasor measurement unit （PMU） is applied to wide area control. According to the property of actual power system, a state feedback controller with partial delay states is proposed. Applying linear matrix inequalities （LMI） theory, the delay dependent stability condition is deduced. In terms of this condition, not only a controller that ensures system stability can be implemented, but also maximum allowable delay ensuring system stability can be obtained. Taking a 4-machine power system for example, the performance of the proposed controller is validated by the results of simulation in time-domain, and it is proved that the proposed method is effective.
出处
《电网技术》
EI
CSCD
北大核心
2008年第6期36-41,共6页
Power System Technology
基金
国家自然科学基金资助项目(50595412)~~
关键词
广域测量系统
时延
状态反馈
线性矩阵不等式
时滞依赖
最大允许时间延迟
wide area measurement system（WAMS）
time delay： state feedback
linear matrix inequalities（LMI）
delay dependent
maximum allowable delay
