Research on Current Equalizing in DC Transformers Based on IGCT-Plus Device

HAN Di; ZHANG Meng; WANG Hongbin; LIU Shizhao; WANG Xuewei; LUO Tianyu

doi:10.13296/j.1001-1609.hva.2026.05.013

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Research on Current Equalizing in DC Transformers Based on IGCT-Plus Device

Research & Analysis | 更新时间：2026-05-13

- Research on Current Equalizing in DC Transformers Based on IGCT-Plus Device
- High Voltage Apparatus Vol. 62, Issue 5, Pages: 118-123(2026)
- 作者机构：
  
  中国能源建设集团北京电力设备总厂，北京 102401
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.05.013
  CLC：
- Received：19 October 2025，
  
  Revised：2025-12-21，
  
  Published：16 May 2026
- 稿件说明：
移动端阅览
HAN Di, ZHANG Meng, WANG Hongbin, et al. Research on Current Equalizing in DC Transformers Based on IGCT-Plus Device[J]. High Voltage Apparatus, 2026, 62(5): 118-123.
DOI：

HAN Di, ZHANG Meng, WANG Hongbin, et al. Research on Current Equalizing in DC Transformers Based on IGCT-Plus Device[J]. High Voltage Apparatus, 2026, 62(5): 118-123. DOI： 10.13296/j.1001-1609.hva.2026.05.013.

摘要

针对双主动桥DC-DC变换器（DAB）的模块化直流变压器，我公司在新型双有源DC-DC拓扑直流变压器进行设计应用，开展了适用于IGCT-Plus作为模组开关器件的直流变压器试验，实现不同电压等级的直流系统的互联，为不同直流负荷提供稳定的直流电压，试验中该直流变压器存在各支路电流长期不平衡流动，会严重影响直流变压器及整个电力系统的长期稳定运行。根据以往工程经验，通过加装均流磁环可对直流变压器低压侧各支路进行均流，均衡三条并联支路的输出特性，防止某一路长期电流应力过大，造成器件老化损坏，大大提高变压器运行的稳定性。

Abstract

For the modular DC transformer based on the dual-active bridge DC-DC converter (DAB)

the design and application work on a novel dual-active DC-DC topology DC transformer is performed in our company. The test on a DC transformer using IGCT-Plus as the modular switching device is developed to achieve interconnection between DC systems of different voltage levels and provide stable DC voltage for different DC loads.During the test

the longterm unbalanced current flow in each branch of the DC transformer is existed

which can severely affect the longterm stable operation of both DC transformer and entire power system. Based on previous engineering experience

the addition of current equalizing magentic rings can balance the currents in the low-voltage side branches of the DC transformer

equalizing the output characteritics of the three parallel branches

preventing excessive current stress on any single branch over prolonged periods that could cause device aging and damage

and significantly improving the operation stability of the transformer.

关键词

Keywords

references

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