Clamping Circuit Losses Calculation Method for MMC Submodule Based on IGCT

LOU Yantao; LIU Qi; XU Haibo; JI Yiming

doi:10.13296/j.1001-1609.hva.2025.07.023

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Clamping Circuit Losses Calculation Method for MMC Submodule Based on IGCT

Research & Analysis | 更新时间：2025-06-30

- Clamping Circuit Losses Calculation Method for MMC Submodule Based on IGCT
- High Voltage Apparatus Vol. 61, Issue 7, Pages: 197-202(2025)
- 作者机构：
  
  1.西安西电电力系统有限公司，西安　710065
  2.清华大学电机工程与应用电子技术系，北京　100084
  3.国网经济技术研究院有限公司，北京　102200
- 作者简介：
- 基金信息：
  
  Science and Technology Project of State Grid Corporation of China(5500-202356107A-1-1-ZN)
- DOI：10.13296/j.1001-1609.hva.2025.07.023
  CLC：
- Received：19 January 2025，
  
  Revised：28 March 2025，
  
  Published：16 July 2025
- 稿件说明：
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LOU Yantao, LIU Qi, XU Haibo, et al. Clamping Circuit Losses Calculation Method for MMC Submodule Based on IGCT[J]. High voltage apparatus, 2025, 61(7): 197-202.
DOI：

LOU Yantao, LIU Qi, XU Haibo, et al. Clamping Circuit Losses Calculation Method for MMC Submodule Based on IGCT[J]. High voltage apparatus, 2025, 61(7): 197-202. DOI： 10.13296/j.1001-1609.hva.2025.07.023.

摘要

箝位电路损耗计算是IGCT-MMC换流阀电气设计、运行损耗评估，以及阀冷却系统设计的基础。在分析IGCT-MMC子模块箝位电路工作原理的基础上，基于IGCT关断电流及二极管反向恢复电流的指数函数模型，建立了子模块换流暂态过程箝位电路的等效模型，提出了子模块箝位电路损耗的解析计算方法。对比试验测量和理论计算结果，验证了所提出损耗计算方法的有效性。

Abstract

The losses calculation of clamping circuit is the basis for the electrical design

operation loss assessment

and valve cooling system design of IGCT-MMC converter valves. Based on the analysis of the operating principle of clamping circuit for IGCT-MMC submodule

an equivalent model of the clamping circuit for the transient process of the submodule commutation is set up based on the exponential function model of the IGCT turn-off current and the diode reverse recovery current. An analytical calculation method for the losses of the submodule clamping circuit is proposed. The effectiveness of the proposed loss calculation method is verified by comparing the experimental and the theoretical calculation results.

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