A Coordinated DC Voltage Control Strategy for H-Bridge Cascaded STATCOM

摘要：

keeping the equalization of the DC capacitor voltage is one of the critical problems for the reliable operation of the cascaded H-bridge multilevel STATCOM.In this paper,a novel coordinated DC voltage control strategy for H-bridge cascaded STATCOM is proposed to solve this above problem without extra infrastructures.This control strategy is a two-level hierarchy which consists of a predicted central controller and an amending distributed controller.This predicted central controller is to obtain the reference of equivalent output voltage of STATCOM by a dual-loop DC voltage and AC instantaneous current controller.The result of distributed DC voltage controller is functioned to just amend the above average voltage reference slightly while the implement of predict ac output reference as a feed forward component.The simulation platform has been built on Matlab/Simulink and PLECS.The simulation results show that the proposed control strategy has excellent robustness and fast-response characteristic in a large step change.

关键词： STATCOM DC voltage:H-bridge

作者: Yan Du Jianhui Su Xiangzhen Yang

作者单位: School of Electrical Engineering and Automation,Hefei University of Technology,Hefei,China Photovoltaic System Research Center of Education Ministry,Hefei,China

会议类型: 国际会议

会议名称: 2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies(第四届电力设施管制、重建及能源技术国际会议 DRPT 2011)

会议地点: 威海

会议语种:英文

页码: 461-465

在线出版日期: 2011-07-06（万方平台首次上网日期，不代表论文的发表时间）