Voltage Balance Control of DC Capacitors of 11-level Cascade STATCOM

REN Ming-wei1; SUN YU-kun1; RAO Xiang2

doi:10.13296/j.1001-1609.hva.2010.04.015

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Voltage Balance Control of DC Capacitors of 11-level Cascade STATCOM

更新时间：2025-04-26

- Voltage Balance Control of DC Capacitors of 11-level Cascade STATCOM
- High VoltageApparatus Vol. 46, Issue 4, Pages: 10-15(2010)
- 作者机构：
  
  1. 江苏大学电气信息工程学院
  2. 海军工程大学电气工程系
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2010.04.015
  CLC： TM53
- Published：2010
- 稿件说明：
移动端阅览
[1]任明炜,孙玉坤,饶翔.十一电平链式STATCOM直流电容电压平衡控制研究[J].高压电器,2010,46(04):10-15.

REN Ming-wei1, SUN YU-kun1, RAO Xiang2. Voltage Balance Control of DC Capacitors of 11-level Cascade STATCOM[J]. High voltageapparatus, 2010, 46(4): 10-15.
[1]任明炜,孙玉坤,饶翔.十一电平链式STATCOM直流电容电压平衡控制研究[J].高压电器,2010,46(04):10-15. DOI： 10.13296/j.1001-1609.hva.2010.04.015.

REN Ming-wei1, SUN YU-kun1, RAO Xiang2. Voltage Balance Control of DC Capacitors of 11-level Cascade STATCOM[J]. High voltageapparatus, 2010, 46(4): 10-15. DOI： 10.13296/j.1001-1609.hva.2010.04.015.

摘要

直流侧电容电压的不平衡及其控制是链式STATCOM要解决的关键问题。笔者给出了链式STATCOM直流电容稳态数学模型

分析了逆变桥参数对电容电压不平衡的影响

指出开关脉冲延时不同、混合型损耗差异以及并联型损耗差异是造成电容电压不平衡的主要原因。结合十一电平STATCOM

提出采用基频开关法投和基频脉冲循环换位法可以有效的保持链式STATCOM直流电容电压的平衡稳定

STATCOM的PSCAD模型及其仿真验证了该方法的可行性和有效性。

Abstract

The control of voltage balance of DC capacitors is very important for reliable operation of cascade STATCOM.The impact of inverter parameters on the capacitors’ voltage distribution is investigated based on the proposed static mathematical model of cascade STATCOM DC capacitors

and the result shows that different switching loss

parallel loss

and time delay of gate pulse are the main causes of voltage unbalance.For a 11-level cascade STATCOM

fundamental frequency switching and pulse cycle transposition methods are proposed to keep the voltage balance of DC capacitors.Simulation of the PSCAD model of STATCOM verifies the feasibility and effectiveness of the proposed methods.

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