电力系统保护与控制Issue(3)：56-62,7.
模块化多电平换流器电容电压与环流的控制策略
Capacitor voltage and circulation current control strategy in modular multilevel converter
高建 1苏建徽 1高航 1丁云芝 1汪晶晶1
作者信息
- 1. 合肥工业大学教育部光伏系统工程研究中心，安徽 合肥 230009
- 折叠
摘要
Abstract
Capacitor voltage control and circulation current suppression are of great importance in the research of MMC topology. In the meantime, they are also the bottleneck restricting the application of MMC topology in the field of flexible high voltage direct current (HVDC). This paper analyzes generation mechanism of the capacitor voltage fluctuations and even harmonics circulation current in MMC. Based on the strategy of carrier phase-shift modulation (CPS-SPWM) by sorting and equalizing voltage, the capacitor voltage balance control is added so as to suppress the capacitor voltage fluctuation. In addition, the paper introduces a close-loop resonant circulation controller to realize suppression of AC component of the circulation current. This control method has simple structure and is suitable for single-phase system. Simulation results show that both the capacitor voltage fluctuation and circulation current can be well suppressed with the proposed method. The dynamic results are also good.关键词
模块化多电平换流器/电容电压/环流/电压均衡控制/谐振控制器Key words
modular multilevel converter/capacitor voltage/circulation current/voltage balance control/resonant controller分类
信息技术与安全科学引用本文复制引用
高建,苏建徽,高航,丁云芝,汪晶晶..模块化多电平换流器电容电压与环流的控制策略[J].电力系统保护与控制,2014,(3):56-62,7.
