基于李雅普诺夫函数的直流附加控制器设计  

Design of HVDC Supplementary Controller Based on Lyapunov Theory

作　　者：杨帆[1] 陈陈[1] 王西田[1] 徐英新[1] 史慧杰[1] 沈粱[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240

出　　处：《电网技术》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)~~

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.

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 

分 类 号：TM721.1[电气工程—电力系统及自动化]