新型直流输电系统的非线性附加控制器设计  

Design of Nonlinear Additional Controller for VSC-based HVDC Transmission System

作　　者：黄北军[1] 邹超[1] 王奔[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《四川电力技术》2008年第2期14-17,共4页Sichuan Electric Power Technology

摘　　要：基于电压源换流器(voltage source converter VSC)和脉宽调制(pulse width modulation PWM)技术的新型高压直流输电(VSC-HVDC)系统,不仅具有有功功率快速调节能力,而且具有无功功率快速调节能力。该文以非线性理论和最优控制理论为基础,通过建立单机经交直流并联于无穷大电力系统的机电振荡非线性数学模型,利用精确线性化理论将非线性系统化为线性系统,在线性系统的基础上设计最优控制器,通过坐标变换,得出非线性附加控制规律,仿真结果表明VSC-HVDC系统在装设了该附加控制器后,可显著增加系统振荡阻尼,快速恢复系统稳定。Based on voltage source converter （VSC） and pulse width modulation （PWM） technology, the VSC- based HVDC transmission system not only possess the capability of controlling active power fast, but also possess the capability of controlling reactive power quickly. Based on nonlinear theory and optimum control theory, the electromechanical oscillation nonlinear mathematical model of infinity power system is built with single machine by AC/DC connection, the nonlinear system is transferred to linear system based on precision lineafized theory, the optimum controller for this linear system is designed, the nonlinear additional control law is obtained through coordinate transformation. Simulation results show that the system damping for frequency oscillation can be obviously increased and the system stability can be rapidly recovered after the additional damping controller is equipped.

关 键 词：电压源换流器 新型高压直流输电 精确线性化 最优控制 附加阻尼控制器 

分 类 号：TM762[电气工程—电力系统及自动化]