基于分层控制与辅助均压的链式STATCOM直流侧电压控制方法

DC Voltage Balance Control for Cascaded STATCOM Based on Hierarchical Control

在分析链式STATCOM直流侧电压不平衡机理的基础上,结合链式STATCOM的工作特性,提出了基于分层控制思想和电容之间自动均压的链式STATCOM直流侧电压控制策略,并给出了辅助开关器件的开关逻辑和实现方法。仿真试验证明了该方法的有效性。

This paper analyzes the mechanism on imbalance in DC side voltage of cascaded STATCOM, combined with the performance characteristics of the cascaded STATCOM, proposes a new control scheme for DC side voltage balance of the cascaded STATCOM based on hierarchical control theory and automatic voltage equalization among the capacitors, and gives the switching logic and realizing method for auxiliary switches. The simulation verifies the effectiveness of the scheme proposed in the paper.