摘要
介绍一种新的适用于一般结构非线性多输入多输出系统的输出反馈控制理论,提出该理论的一种改进形式,从而扩展其应用范围,并进而应用于电力系统励磁控制。针对单机无穷大系统,采用角速度、机端电压及电流为反馈信号,首次推导出系统的可观域,并基于上述改进理论设计一种新的非线性输出反馈励磁控制器。该控制器不需要转子角信号,从而比一般的非线性状态反馈励磁控制器实践性强。最后利用PSCAD/EMTDC对该控制器进行暂态仿真,以验证其对电力系统扰动的抑制效果。
A novel nonlinear output feedback control theory for a general class of multi-input-multi-output nonlinear systems was introduced, and an improvement was presented that extended its application. Based on the improved theory, this paper designed a novel nonlinear output feedback excitation controller for single machine infinite bus power systems, where rotor speed, generator voltage and current were adopted as the feedback signals, and the observable domain was derived for the first time. The controller doesn’t need the signal of rotor angle, thus is more practical than the existing nonlinear state feedback excitation controllers. Finally a test case was conducted by PSCAD/EMTDC to verify its capability of restraining disturbances.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第13期33-39,共7页
Proceedings of the CSEE
关键词
电力系统
非线性控制
输出反馈控制
可观域
分离原理
励磁控制
power system
nonlinear control
output feedback control
observable domain
separation principle
excitation control
