对称根轨迹法设计新型电力系统控制器  

New Power System Controller Designed by Symmetric Root Locus Method

作　　者：冯楠[1] 马进[1] 陈茜[1] 胡浩[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《现代电力》2014年第4期54-59,共6页Modern Electric Power

摘　　要：随着互联电力系统规模不断扩大,电力系统低频振荡问题愈发突出。电力系统稳定器(PSS)在抑制低频振荡方面作用明显,但是也有其局限性,PSS的鲁棒性和多机系统情况下的稳定控制还有很多问题亟待解决。本文提出一种新型对称根轨迹法(SRL)设计控制器,以单机无穷大系统为例,进行SRL控制器设计,通过根轨迹图和阶跃响应来验证其控制效果,并与传统PSS进行对比。之后,为了增加其实际可行性,对SRL控制器进行了降维简化,只保留与转速和功角对应的分量,通过仿真可以看出,基本达到了全维控制器的控制效果。With the expansion of the interconnected power system scale, low frequency oscillation problems of power system are more and more outstanding. Power system stabi- lizer （PSS） does well in suppressing low frequency oscilla- tions, but also has its limitations. The robustness of PSS and many problems in multi-machine system cases are required to be solved. In this paper, a new controller designed by sym- metric root locus （SRL） method is presented. By taking a single machine infinite bus system as an example, the SRL controller is designed. The root locus diagram and step re- sponse of SRL controller are drawn to validate its control effect by comparing with that of traditional PSS controller. Later, in order to further increase its feasibility in applica- tion, the dimension reduction is used to simplify control for SRL controller, which only keeps the component corre- sponding to rotation speed and angle. It can be concluded that the basic control effect of full order SRL controller is reached from the simulation results.

关 键 词：低频振荡 电力系统稳定器(PSS) 对称根轨迹(SRL) 降维 

分 类 号：TM712[电气工程—电力系统及自动化]