Modeling and Resonance Mechanism Analysis of MMC-HVDC Under Unload Condition Considering the High Frequency Characteristics of Electromagnetic Current Transformer Measurement Link

HU Yinghong; SHEN Yuchen; YIN Guangzu; LI Yu; LU Yi

doi:10.13334/j.0258-8013.pcsee.240536

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Modeling and Resonance Mechanism Analysis of MMC-HVDC Under Unload Condition Considering the High Frequency Characteristics of Electromagnetic Current Transformer Measurement Link

更新时间：2026-02-05

- Modeling and Resonance Mechanism Analysis of MMC-HVDC Under Unload Condition Considering the High Frequency Characteristics of Electromagnetic Current Transformer Measurement Link
- Vol. 45, Issue 18, Pages: 7136-7148(2025)
- 作者机构：
  
  1. 国网冀北电力有限公司电力科学研究院, 北京市西城区,100045
  2. 能源电力创新研究院(华北电力大学), 北京市昌平区,102206
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.240536
  CLC：
- Published：2025
- 稿件说明：
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HU Yinghong, SHEN Yuchen, YIN Guangzu, et al. Modeling and Resonance Mechanism Analysis of MMC-HVDC Under Unload Condition Considering the High Frequency Characteristics of Electromagnetic Current Transformer Measurement Link[J]. 2025, 45(18): 7136-7148.
DOI：

HU Yinghong, SHEN Yuchen, YIN Guangzu, et al. Modeling and Resonance Mechanism Analysis of MMC-HVDC Under Unload Condition Considering the High Frequency Characteristics of Electromagnetic Current Transformer Measurement Link[J]. 2025, 45(18): 7136-7148. DOI： 10.13334/j.0258-8013.pcsee.240536.

摘要

在张北可再生能源柔性直流电网示范工程的投运过程中，康巴诺尔孤岛换流站在空载的情况下发生了多次高频谐振。针对该问题，该文首先考虑电磁式电流互感器测量回路动态特性，采用π型电路对电流测量环节的二次电缆进行等效，构建包含电流测量环节的柔性直流输电孤岛消纳新能源系统在空载下的数学模型。接着，进行稳定性分析，提出电流互感器测量环节的传变特性导致换流站空载情况下发生高频谐振的机理。然后，通过仿真实验和现场试验，验证建立的孤岛消纳新能源系统模型的准确性以及高频谐振机理的合理性。最后，提出高频谐振的抑制措施，并通过仿真与现场试验进行验证。研究结果可对柔性直流工程提供技术指导，具有一定的实际意义。

Abstract

During the operation of Zhangbei Renewable Energy flexible DC power grid demonstration project

high frequency resonance occurred many times in Kangbanuoer Island converter station under no-load condition. To solve this problem

we firstly consider the dynamic characteristics of electromagnetic current transformer measurement loop in modeling

obtain π-type equivalent circuit for the current measurement link of the cable

and build a mathematical model of flexible HVDC island absorbing new energy system with current measurement link under no-load condition. Secondly

the stability of the above mathematical model is analyzed

and the mechanism of high frequency resonance in the converter station under no-load condition is proposed. Then we conduct simulation and field test

which demonstrate the accuracy of the new energy system model and the rationality of the high frequency resonance mechanism of the island converter station caused by the measurement link of the current transformer. At the same time

the suppression measures of high frequency resonance are proposed

which are verified by simulation and field test. The research can provide important technical guidance for MMC-HVDC projects

and has great practical significance.

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