大型电网连锁故障分析技术及大停电智能预警系统

Cascading Failure Analysis in Large-scale Power Grid and Intelligent Mitigation System for Blackout Prevention

连锁故障引发的大停电事故在全球范围内时有发生,对社会和经济造成了巨大损失。为了理解连锁故障的演变特征并进一步构建有效的大停电预防系统,回顾近年来国内外发生的8次大停电事故,研究大停电事故的故障演化过程;对现有连锁故障研究模型和方法进行评述,分析其适用性及模型优缺点;提出基于事件校核和连续时域仿真的连锁故障时序事件搜索方法;最终基于所提连锁故障时序事件搜索方法构建了可用于大停电风险可视化预警的智能预警系统。

Great blackouts induced by cascading failures occurred frequently in recent years, resulting in great loss in society and economy. In order to understand the evolution feature of cascading failures and further establish an effective blackout pre- vention system, the evolution procedure of great blackouts is firstly studied by reviewing eight great blackouts occurred in the worldwide, and then the methodologies for cascading failures analysis are reviewed. After that, an analysis method based on e- vent checkers and continuous time domain simulation is proposed. Consequently, the application system for great blackout mit- igation is established.