基于模块化多电平换流器的新型全桥损耗优化调制策略

XIE Yeyuan

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基于模块化多电平换流器的新型全桥损耗优化调制策略

更新时间：2025-08-13

- 基于模块化多电平换流器的新型全桥损耗优化调制策略
- Automation of Electric Power Systems Vol. 40, Issue 6, Pages: 78-84(2016)
- 作者机构：
  
  南京南瑞继保电气有限公司,江苏省,南京市,211102
- 作者简介：
- 基金信息：
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- Published：2016
- 稿件说明：
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XIE Yeyuan. [J]. Automation of electric power systems, 2016, 40(6): 78-84.
DOI：

XIE Yeyuan. [J]. Automation of electric power systems, 2016, 40(6): 78-84. DOI：

摘要

提出了一种新型全桥损耗优化调制策略，可以平衡子模块中各个半导体开关器件的热应力，提高器件安全裕度，从而提升模块化多电平换流器(MMC)的功率传输能力。首先，对构成MMC的子模块结构进行了分析，从抑制直流侧故障角度出发，选择了全桥子模块作为分析的对象。其次，针对MMC型高压直流输电(MMC-HVDC)系统的各种工况进行了损耗和结温分析，找出了限制MMC功率传输的主要因素。最后，在综合分析的基础上，针对MMC-HVDC系统提出了全桥损耗优化调制策略，该方法可以提升直流传输功率。仿真分析验证了所提出的全桥损耗优化调制策略的有效性。

Abstract

A new full-bridge loss optimization modulating strategy is proposed. The strategy is able to balance the thermal stress of each semiconductor in a sub-module and improve the device safety margin

so as to enhance the power transfer capability of the modular multilevel converter(MMC). To begin with

the topology of the sub-module of MMC is analyzed. Proceeding from the perspective of suppressing the DC fault current

a full-bridge sub-module is chosen as the object for analysis. Secondly

for various working conditions of the MMC-HVDC transmission system

the loss and the junction temperature are analyzed to identify the main factor limiting the MMC power transfer. Finally

based on a comprehensive analysis

the full-bridge loss optimization modulation strategy is proposed for the MMC-HVDC transmission system

which can improve the transmission power. Simulation analysis has verified the validity of the strategy.

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