交直流系统连锁故障模型及停电风险分析

YU Xiaopeng

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交直流系统连锁故障模型及停电风险分析

更新时间：2025-08-13

- 交直流系统连锁故障模型及停电风险分析
- Automation of Electric Power Systems Vol. 38, Issue 19, Pages: 33-39(2014)
- 作者机构：
  
  国网河南省电力公司电力科学研究院,河南省,郑州市,450052
- 作者简介：
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- Published：2014
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YU Xiaopeng. [J]. Automation of electric power systems, 2014, 38(19): 33-39.
DOI：

YU Xiaopeng. [J]. Automation of electric power systems, 2014, 38(19): 33-39. DOI：

摘要

随着越来越多的直流输电线路投运，交直流系统连锁故障的研究变得非常迫切。提出了一种基于改进OPA模型的交直流系统连锁故障模型。该模型考虑100Hz谐波保护等直流系统保护装置，模拟了交直流系统的调度环节，可分析交直流系统之间的故障传播过程以及直流系统可控性对停电风险的影响。该模型使用直流系统的等效导纳参数计算短路电压，避免了详细的时域仿真，提高了计算效率。对IEEE30节点和河南电网系统进行了仿真。结果表明，在没有远距离输电的情况下，纯直流和交直流互联系统的停电风险高于纯交流互联方式的系统。但由于直流系统具有良好的调节能力，纯直流互联方式系统的停电风险在调度环节的恰当作用下可以显著降低。

Abstract

With the ever-increasing DC transmission lines，research on cascading failures of the AC-DC system is becoming very urgent.A cascading failure model for the AC-DC system based on the improved OPA model is proposed.With dispatching and the main protection devices such as 100 Hz harmonic protection devices taken into account，it is possible to analyze the failure propagation process in the AC-DC system and the impact of DC system controllability on blackout risk.This model uses equivalent admittance parameter of DC system to calculate the short-circuit voltage，thus avoiding detailed time-domain simulation and significantly improving computational efficiency.Simulations are performed on a revised IEEE 30-bus system and Henan power grid.The results show that blackout risk of DC and AC-DC interconnected systems are higher than that of AC interconnected system with no long distance power transmission.Because of the good regulating ability of the DC system，the blackout risk of DC interconnected system can be appreciably reduced by appropriate impact of the dispatching.

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