计及连锁故障的暂态稳定概率评估方法

doi:10.11930/j.issn.1004-9649.2013.12.38.4

摘要/Abstract

摘要： 动态安全域的一系列研究成果为解析法在暂态稳定概率评估的应用提供了便利条件。针对负载较重的电网,提出了一种基于动态安全域的计及连锁故障引起系统失稳的暂态稳定概率评估方法,对系统安全影响较大的线路发生初始故障,交替求解暂态稳定和潮流分布,考虑了失稳以及过载保护动作的概率特性,得到对系统安全影响较大的线路最可能引发的连锁故障路径,进而求得考虑连锁故障引发系统失稳在内的线路不安全概率指标。以IEEE 10机39节点系统为例,验证了该方法的可行性和合理性。

关键词: 电力系统, 概率评估, 不安全概率指标, 连锁故障, 动态安全域

Abstract: A series of research results on DSR(dynamic security region) provide convenient conditions for application of the analytical method in probabilistic assessment of transient stability. For heavy load grids, a DSR-based probabilistic assessment method considering cascading failures is proposed in this paper for power system transient stability. For the initial power line fault that may have significant impact on system security, based on the probability characteristics of the instability and overload protection, alternative solution of the transient stability and flow distribution is conducted to get the line’s most likely path which may cause cascading failures. And then the line's probability security index is obtained with consideration of the instability caused by cascading failures. Finally, a test is carried out on the IEEE 10-generator 39-node system to verify the effectiveness and rationality of the proposed model.

Key words: School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China

中图分类号:

TM744

刘怀东, 冯伟, 李青, 常安, 范彦阳. 计及连锁故障的暂态稳定概率评估方法[J]. 中国电力, 2013, 46(12): 38-42.

Transient Stability. Probabilistic Assessment Method Considering Cascading Failures for Power System[J]. Electric Power, 2013, 46(12): 38-42.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2013.12.38.4

https://www.electricpower.com.cn/CN/Y2013/V46/I12/38

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