A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter

Fan Cheng; Liangzhong Yao; Jian Xu; Yongning Chi; Yuanzhang Sun; Zhibing Wang; Yan Li

doi:10.17775/CSEEJPES.2020.03510

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A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter

Regular Papers | 更新时间：2026-10-15

- A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter
- A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter
- 中国电机工程学会电力与能源系统学报(英文) 2022年8卷第1期页码：175-187
- 作者机构：
  
  1. China Electric Power Research Institute,Beijing,China
  2. School of Electrical Engineering, Wuhan University,Wuhan,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2020.03510
  中图分类号：
- 纸质出版：2022-01-01
- 稿件说明：
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Fan Cheng, Liangzhong Yao, Jian Xu, 等. A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter[J]. 中国电机工程学会电力与能源系统学报(英文), 2022,8(1):175-187.

Fan Cheng, Liangzhong Yao, Jian Xu, et al. A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter[J]. CSEE Journal of Power and Energy Systems, 2022, 8(1): 175-187.
Fan Cheng, Liangzhong Yao, Jian Xu, 等. A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter[J]. 中国电机工程学会电力与能源系统学报(英文), 2022,8(1):175-187. DOI： 10.17775/CSEEJPES.2020.03510.

Fan Cheng, Liangzhong Yao, Jian Xu, et al. A comprehensive AC fault ride-through strategy for HVDC link with serial-connected LCC-VSC hybrid inverter[J]. CSEE Journal of Power and Energy Systems, 2022, 8(1): 175-187. DOI： 10.17775/CSEEJPES.2020.03510.

摘要

Abstract

An HVDC link with line-commutated converter (LCC) as a rectifier at the power sending end and with a serial-connected LCC and voltage source converter (VSC) hybrid inverter (SLVHI) at the power receiving end

has been adopted for the forthcoming Baihetan HVDC engineering project in China. To realize the AC fault ride-through (FRT) of SLVHI

a new strategy based on DC chopper (DCC) is proposed in this paper. Firstly

the mathematical model is built to investigate the VSC DC overvoltage mechanism after SLVHI commutation failure (CF) and related factors. Secondly

a modified DCC topology of SLVHI is designed to adjust the unbalanced power dissipation based on voltage drop depth. Thirdly

an enhanced voltage-dependent current order limiter (VDCOL) is proposed to deal with the unbalanced power after DCC switch-off. With the cooperation between modified DCC and enhanced VDCOL

the proposed FRT strategy can realize CF mitigation and VSC DC overvoltage suppression simultaneously. Finally

the inverter side AC FRT performances of the HVDC link with SLVHI were studied using PSCAD software/EMTDC algorithm. The simulation results validate the effectiveness and superiority of the proposed strategy

with better CF mitigation and VSC DC overvoltage suppression abilities than offered by other existing FRT strategies under different fault scenarios.

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