电压型超导储能系统统一非线性控制策略  

A Unified Nonlinear Control Strategy for the Voltage Type Superconducting Magnetic Energy Storage System

作　　者：郭文勇[1] 赵彩宏[1] 张志丰[1] 肖立业[1] 欧阳弈[1] 辛理夫[1] 

机构地区：[1]中国科学院电工研究所

出　　处：《电力系统自动化》2007年第19期54-58,共5页Automation of Electric Power Systems

基　　金：国家杰出青年科学基金(50225723)。~~

摘　　要：传统的电压型超导储能系统采用电压型换流器和斩波器分别进行建模和控制的方法,这种控制方式未考虑两者之间的相互影响,协调性能较差。文中建立了电压型超导储能系统的整体数学模型,并在此基础上提出了基于李亚普诺夫直接法的统一非线性控制方法。这种控制方法使得系统在大信号干扰下的稳定性大大提高,同时由于将电压型换流器和斩波器视为一个整体进行控制,两者的协调性得以加强,因此可以采用更小的直流连接电容连接。在斩波器的脉宽调制控制中,采用了载波移相法,提高了等效开关频率,有利于开关管功率的平均分配。系统仿真证明了该控制策略的有效性。In a conventional voltage type superconducting magnetic energy storage system （VSMES）, the voltage sourced converter （VSC） and the chopper are controlled independently, which fails to consider the mutual influence of the two parts and therefore is poor in compatibility. A complete mathematical model of the VSMES is established and a unified nonlinear control strategy based on Lyapunov direct method is also proposed for the VSMES, which significantly improves the system stability under large signal disturbances. Furthermore, the dc link capacitor volume can be reduced because the VSC and chopper are controlled harmonically as a whole. In the pulse width modulation （PWM） control of the chopper, the phase-shift PWM method is adopted, which doubles the equivalent switching frequency and has the benefit of even power distribution among switches. Computer simulations verify the effectiveness of the proposed control strategy.

关 键 词：超导储能 非线性控制 功率调节系统 电压型换流器 斩波器 

分 类 号：TM917[电气工程—电力电子与电力传动]