摘要
利用李雅普诺夫直接法设计了直流附加阻尼控制器,通过构造交直流系统的Lyapunov函数,设计了一个用于改善互联系统阻尼特性的直流附加控制器。该控制器利用两端换流母线处的角速度和相角,以及交流联络线上的功率作为输入信号,结构简单且易于实现。与常规的直流附加控制器相比,该控制器能更有效地抑制功率振荡,提高系统的动态稳定性。仿真结果验证了所提方法的正确性和有效性。
By use of Lyapunov direct method a DC supplementary damping controller is designed. By means of constructing Lyapunov function of AC/DC power grid, a DC supplementary control law is proposed to improve damping characteristic of interconnected power grid. The designed controller uses frequency difference and angle difference between the two interconnected AC systems as well as the power deviation of AC tie-line for input signals, so its structure is simple and easy to realize. Comparing with conventional supplementary controller, the designed controller can suppress power oscillation more effectively and improve dynamic stability of AC/DC power grid. The correctness and effectiveness of the proposed method are verified by simulation results.
出处
《电网技术》
EI
CSCD
北大核心
2008年第18期14-17,共4页
Power System Technology
基金
"十一五"国家科技支撑计划资助项目(2006BAA02A17)
国家自然科学基金资助项目(50595410)~~
关键词
交直流系统
低频振荡
李雅普诺夫直接法
直流附加控制
AC/DC system
low frequency oscillation
Lyapunov direct method
HVDC supplementary control
作者简介
杨帆（1980-），男，博士，从事交直流电力系统低频振荡及次同步振荡方面研究，E—mail：yangfan_sjtu@hotmail．com；
陈陈（1938-），女，教授，博士生导师，从事电力系统稳定性及控制等方面研究；
王西田（1973-），男，副教授，从事电力系统动态仿真、机网协调等方面研究。
