级联H桥变流器电容电压均衡约束条件

LIU Qiujiang

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级联H桥变流器电容电压均衡约束条件

更新时间：2025-08-13

- 级联H桥变流器电容电压均衡约束条件
- Automation of Electric Power Systems Vol. 40, Issue 15, Pages: 113-119(2016)
- 作者机构：
  
  北京交通大学电气工程学院,北京市,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2016
- 稿件说明：
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LIU Qiujiang. [J]. Automation of electric power systems, 2016, 40(15): 113-119.
DOI：

LIU Qiujiang. [J]. Automation of electric power systems, 2016, 40(15): 113-119. DOI：

摘要

通过建立级联H桥变流器数学模型

分析了引起电容电压不均衡原因

建立了调制波微调量叠加法的微分方程与传递函数

求出了均压控制下电容电压稳态解析解。针对多模块下调节器参数整定问题

分析确定了调制波微调量叠加法可靠工作的相角约束和比例系数约束条件。进而指出了变流器在感性、容性工作状态之间切换时电容均压控制稳定工作条件。利用PSCAD/EMTDC软件搭建了三相三级联变流器模型

通过仿真验证了所提出的约束条件的有效性。

Abstract

This paper establishes a mathematical model of cascaded H-bridge converters and analyzes the factors which cause capacitor voltage unbalance. Further

the differential equation and transfer function are presented to describe the modulated wave adjustment balancing method. The analytical solution of the capacitor voltage steady value is obtained under balanced voltage control condition. In order to set appropriate controller parameters of many sub-modules

phase and proportion coefficient constraints are studied and calculated. Likewise

when the converter switches between the inductive work mode and capacitive work mode

DC capacitor balanced voltage control must conform to the constraints. A model for a three-phase converter is developed via PSCAD/EMTDC. Simulation results have verified that the phase and proportion coefficient constraints are effective. This work is supported by the Science and Technology Development Plan of China Railway Corporation(No. 2015J008-F).

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