光伏接入下高压直流输电系统后续换相失败抑制策略研究

ZHAO Jingbo; ZHONG Wenliang; AN Haiyun; LIU Jian; LIN Sheng

doi:10.19783/j.cnki.pspc.240992

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光伏接入下高压直流输电系统后续换相失败抑制策略研究

更新时间：2025-10-29

- 光伏接入下高压直流输电系统后续换相失败抑制策略研究
- Power System Protection and Control Vol. 45, Issue 9, (2025)
- 作者机构：
  
  1. 1.江苏省电力试验研究有限公司,江苏,南京,211103
  2. 西南交通大学电气工程学院,四川,成都,611756
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.240992
  CLC：
- Published：2025
- 稿件说明：
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ZHAO Jingbo, ZHONG Wenliang, AN Haiyun, et al. 光伏接入下高压直流输电系统后续换相失败抑制策略研究[J]. Power system protection and control, 2025, 45(9).
DOI：

ZHAO Jingbo, ZHONG Wenliang, AN Haiyun, et al. 光伏接入下高压直流输电系统后续换相失败抑制策略研究[J]. Power system protection and control, 2025, 45(9). DOI： 10.19783/j.cnki.pspc.240992.

摘要

大量新能源发电系统接入高压直流输电系统受端电网势在必行，然而鲜有研究涉及该场景下的高压直流后续换相失败抑制。首先，针对光伏接入电网换相换流器型高压直流输电系统受端交流电网的场景，分析了交流故障后光伏诱发电网换相换流器型高压直流输电系统后续换相失败的相关机理，发现电网换相换流器型高压直流输电系统在首次换相失败恢复后易因光伏出力波动而出现超前触发角指令波动的问题。在此基础上，提出了一种基于逆变侧控制指令波动平抑的后续换相失败抑制策略，该策略在定电流、定关断角控制的基础上引入附加电流、关断角偏差，可缓解超前触发角指令波动。最后，结合PSCAD/EMTDC仿真软件在不同光伏装机容量、接入距离、故障位置下验证了所提抑制策略的有效性。

Abstract

It has become a trend that large scale renewable energy power generation systems are connected to the receiving end grid of HVDC transmission systems. However

there is limited research on suppressing subsequent commutation failure in HVDC systems under such scenarios. First

in view of the scenario of PV connecting to the receiving end of LCC AC grid

the relevant mechanisms of subsequent commutation failure induced by PV after an AC fault are analyzed. It is found that after the initial commutation failure recovery

LCC experiences oscillations in the firing angle command due to PV output fluctuations. To address this

a subsequent commutation failure suppression strategy based on the suppression of inverter control command oscillations is proposed. By introducing additional current and extinction angle deviations into the constant current control and constant extinction angle control

the proposed method alleviates oscillations in the firing angle command. Finally

PSCAD/EMTDC simulations under different PV installation capacities

connection distances

and fault locations validate the effectiveness of the proposed suppression strategy.

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