基于换相电压的混合级联型HVDC系统后续换相失败预判及抑制策略

BIAN Jing; LONG Zhiheng; WANG He; LI Guoqing; GUO Jiazhi

doi:10.13336/j.1003-6520.hve.20250318

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基于换相电压的混合级联型HVDC系统后续换相失败预判及抑制策略

更新时间：2026-09-16

- 基于换相电压的混合级联型HVDC系统后续换相失败预判及抑制策略
- Vol. 52, Issue 2, Pages: 674-683(2026)
- 作者机构：
  
  现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林,132012
- 作者简介：
- 基金信息：
- DOI：10.13336/j.1003-6520.hve.20250318
  CLC：
- Published：2026
- 稿件说明：
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BIAN Jing, LONG Zhiheng, WANG He, et al. 基于换相电压的混合级联型HVDC系统后续换相失败预判及抑制策略[J]. 2026, 52(2): 674-683.
DOI：

BIAN Jing, LONG Zhiheng, WANG He, et al. 基于换相电压的混合级联型HVDC系统后续换相失败预判及抑制策略[J]. 2026, 52(2): 674-683. DOI： 10.13336/j.1003-6520.hve.20250318.

摘要

混合级联型高压直流输电(high voltage direct current，HVDC)系统综合了电网换相换流器(line commutated converter，LCC)和模块化多电平换流器(modular multilevel converters，MMC)的优势，具有良好的工程应用前景，该文对该系统后续换相失败预判及抑制开展了研究。首先，明确了换相失败恢复期间各阶段控制器交互作用以及换相电压跌落产生的后续换相失败风险。其次，在考虑MMC与LCC端口直流电压交互作用和混合级联型HVDC系统中各控制器作用的基础上，提出了一种通过对比换相电压有效值与阈值电压的后续换相失败预判方法；然后，提出了MMC提供持续无功支持和动态更改定关断角控制(constant extinction angle control，CEAC)中关断角指令值的协调控制策略，以实现后续换相失败抑制；最后，在PSCAD/EMTDC中搭建了相应的混合级联系统电磁暂态仿真模型，对预判方法的准确性和抑制策略的有效性进行了验证。

Abstract

The hybrid cascaded high-voltage direct-current (HVDC) system

combining the advantages of line-commutated converters (LCC) and modular multilevel converters (MMC)

exhibits promising engineering application potential. This paper conducts research on the prediction and suppression of subsequent commutation failures in such systems. First

the risk of subsequent commutation failures caused by both the interaction between controllers during each phase of the commutation failure recovery period and commutation voltage sags was clarified. Secondly

after considering the DC voltage interactions between MMC and LCC terminals and the roles of controllers in the hybrid cascaded HVDC system

a prediction method for subsequent commutation failures is proposed by comparing the effective value of commutation voltage with a threshold voltage. Then

a coordinated control strategy is presented

involving continuous reactive power support from MMC and dynamic modification of the extinction angle reference in constant extinction angle control (CEAC)

to achieve suppression of subsequent commutation failures. Finally

an electromagnetic transient simulation model of the hybrid cascaded system is established in PSCAD/EMTDC

verifying the accuracy of the prediction method and the effectiveness of the suppression strategy.

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