基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析

李大虎; 肖博; 饶渝泽; 周泓宇; 曾鹏; 姚伟; 文劲宇

doi:10.19783/j.cnki.pspc.250353

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基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析

更新时间：2026-02-03

- 基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析
- Power System Protection and Control Issue 3, (2026)
- 作者机构：
  
  1. 1.国网湖北省电力有限公司,湖北,武汉,430077
  2. 强电磁技术全国重点实验室 (华中科技大学电气与电子工程学院)， ),湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.250353
  CLC：
- Published：2026
- 稿件说明：
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李大虎, 肖博, 饶渝泽, et al. 基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析[J]. Power System Protection and Control, 2026, (3).
DOI：

李大虎, 肖博, 饶渝泽, et al. 基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析[J]. Power System Protection and Control, 2026, (3). DOI： 10.19783/j.cnki.pspc.250353.

摘要

随着特高压直流输电和新能源的持续发展，受端电网中交流-直流-新能源耦合关系日益复杂，单一交流故障处理不当容易引发系统性连锁故障，严重威胁受端电网安全运行。为揭示受端电网连锁故障演化机理，首先推导直流换相失败、新能源高/低电压穿越及脱网、直流闭锁等关键事件的因果联系。其次，分析了不同联络线阻抗和换相失败预防(commutation failure prevention

CFPREV)控制下直流换相失败对新能源低电压穿越的影响。最后，基于因果关系揭示了受端电网连锁故障演化机理和路径。基于PSCAD/EMTDC搭建了复杂受端电网模型，通过典型连锁故障仿真算例，验证了受端电网连锁故障演化路径与机理分析的正确性。

Abstract

With the continuous development of ultra-high-voltage direct current (UHVDC) transmission and new energy

the coupling relationship among AC

and new energy in receiving power grids has become increasingly complex. Improper handling of a single AC fault can easily lead to systematic cascading failures

posing a serious threat to the safe operation of receiving power grids. To reveal the evolution mechanisms of cascading failures in receiving power grids

this paper first derives the causal relationships among key events

including DC commutation failure

high/low voltage ride-through and disconnection of new energy sources

and DC blocking. Subsequently

the impact of DC commutation failure on the low-voltage ride-through performance of new energy under different tie-line impedances and commutation failure prevention (CFPREV) control are analyzed. Finally

based on causal relationships

the evolution mechanisms and paths of cascading failure in receiving power grids are revealed. A complex receiving-end power grid model is built in PSCAD/EMTDC

and typical cascading fault simulation cases are conducted to verify the correctness of the proposed analysis of cascading failure evolution paths and mechanisms.

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