摘要
针对远距离、多区域交直流互联电网低频振荡现象,提出了一种基于改进矩阵束算法的PSS和直流附加控制器协调运行的优化设计。具体包括利用改进矩阵束算法对全网系统辨识,得出系统在没有配置PSS和直流附加控制器时的振荡频率和阻尼比,设定协调优化的目标函数,利用共轭轨迹法优化PSS和直流附加控制器参数;反复利用改进矩阵束算法对系统进行辨识,不断优化协调参数,直到系统逐渐消除低频振荡。仿真结果表明,该协调优化设计可有效抑制电力系统低频振荡,增加系统阻尼,提高系统稳定性。
In light of the low frequency oscillation of long-distance multi-regional AC/DC parallel power system, an optimal design is proposed to coordinate PSS and DC additional controller. The improved matrix pencil algorithm is used to identify the whole power system and derive the oscillation frequency and damping ratio of the system without PSS and DC additional controller. Then with a set objective function, the conjugate trajectory method is applied to op- timize the control parameters of PSS and DC additional controller; the improved matrix pencil algorithm is employed repeatedly for system identification and coordinative parameter optimization until the system gradually removes the low frequency oscillation. Simulation results verify that the proposed coordinative optimal design can effectively suppress low frequency oscillation and improve system damping and stability.
出处
《华东电力》
北大核心
2013年第9期1835-1839,共5页
East China Electric Power
基金
国家自然科学基金重点项目(51037003)
国家高技术研究发展计划(2011AA05A119)
国家电网公司科技重大专项(SGCC-MPLG027-2012)~~
关键词
交直流并联系统
低频振荡
PSS
直流附加控制器
改进矩阵束辨识
AC/DC parallel power system
low frequency oscillation
PSS
DC additional controller
improved ma-trix pencil algorithm
