基于模块化多电平换流器的STATCOM分析与控制  

Analysis and control of STATCOM based on modular multilevel converters

作　　者：朱劲松[1] 李磊[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094

出　　处：《电力系统保护与控制》2012年第24期113-117,124,共6页Power System Protection and Control

基　　金：国家自然科学基金(51177073);江苏省自然科学基金(BK2009389)~~

摘　　要：针对基于模块化多电平换流器(MMC)结构的静止同步补偿器(STATCOM),详细分析了其电路拓扑和工作原理。研究了一种基于三角函数变换法则的动态无功电流检测方法,将其应用于MMC型STATCOM,取得了较好的动态检测效果。为保证MMC直流侧电容电压的稳定,采取了子模块电压均分和电压平衡的控制方法,并提出将误差调节信号叠加至CPS-SPWM的各子模块调制波上,在跟踪输出补偿电流的同时,提高了直流侧电容电压的抗干扰性。最后通过仿真分析和对比试验,说明了MMC型STATCOM在稳态和动态调节中均具有良好的补偿效果。A new shunt STATCOM based on modular multilevel converter （MMC） is researched, and its circuit topology and working principle are analyzed in detail. A dynamic reactive current detection method based on the trigonometric function is applied to the compensation of MMC inverter, which has good dynamic response. In order to keep voltage stability of the DC-side capacitors, average and balance control method is applied. With superposing the regulating error signal on CPS-SPWM waves of each module, anti-jamming capability of the capacitor voltage is improved while the output compensation current is traced. Simulation analysis and comparison test results show that the MMC-based STATCOM is reliable and has good dynamic compensation effect.

关 键 词：静止同步补偿器 模块化多电平换流器 无功检测 电压稳定 误差叠加 

分 类 号：TM464[电气工程—电器]