摘要
针对单域电力系统,提出了基于等速趋近律的滑模负荷频率控制器设计策略。首先通过矩阵初等变换将原系统转换成标准型,基于标准型设计切换面,利用极点配置选择适当的切换函数,保证系统具有稳定的滑动模态;其次基于等速趋近律设计滑模控制器,使得电力系统状态在有限时间内到达滑模面;最后利用Matlab进行仿真研究,将传统的基于不等式趋近律设计的滑模控制器和提出的基于等速趋近律设计的滑模控制器,分别对理想工作状态下和发电机出力受约束(GRC)情况下的电力系统进行仿真比较,可以看出设计的滑模负荷频率控制器具有较好的频率偏差抑制效果。
For the frequency deviation caused by load disturbance in a single area power system, a sliding mode load frequency controller design method is proposed based on constant reaching law to control the frequency deviation in an allowed range an（] ensure the sta- bility of the system. Firstly, through the elementary matrix transformation of the original system, which is eonvelled into a standard type, and the switching surface is designed based on the standard type system by using pole assignment method, the ~ itching function is chosen properly to guarantees that the system has stable sliding modes . Secondly, based on the constant reaching law , variable structure controller is designed, that made the state trajectory of the power system reach the sliding surface in finite time. Finally, through Matlab simulation, the stability of the power system that under ideal working condition and generator rate constrains （ GRC ） condition using two different sliding mode controllers are discussed. One of which is designed based on the traditional inequality reac- hing law and the other is based on the proposed constant reaching law. It can be seen that the proposed sliding mode controller design method is more effective for frequency deviation.
出处
《控制工程》
CSCD
北大核心
2014年第3期326-329,共4页
Control Engineering of China
基金
上海市教委重点学科建设项目(J51303)
上海市自然科学基金项目(09ZR1413200)
关键词
频率控制
等速趋近律
滑模控制
发电机出力约束(GRC)
frequency control
constant reaching law
sliding mode control
generation rate constrains （GRC）
