潮流转移引起支路传输越限的电网脆弱性研究

Analysis of Power Network Vulnerability Considering Branch Transmission Violation Caused by Power Flow Transfer

摘要: 电网因一个简单的支路停运故障而引起潮流转移进而引起停电事故的现象在电力系统时有发生，是电力工作者比较关注的问题。针对潮流转移，本文从各支路的电流变化量、电流的越限水平以及电网传输性能的变化等参数出发对电网可能存在的脆弱性现象进行了探讨，并利用相关指标结合算例从初始故障引起的电网全局脆弱性后果，以及被初始故障波及支路的受扰程度等几个方面对脆弱性及其表现规律进行了分析和探讨，以期为进一步的研究奠定一定的基础。

Abstract: The phenomenon of blackouts in power grid caused by the power flow transfer happens occasio-nally, and has been paid attention by the power operators. The power flow transfer is usually re-sulted from a simple branch outage. Aiming at power flow transfer, this paper discusses the vul-nerability phenomenon from the angle of the variable quantity, the violation level of the branch current, and the variation of the power network transmission performance. Furthermore, by using the related indices, this paper analyzes the performance and regularity of vulnerability from the angle of vulnerability consequences brought by the initially failed branch on the power network, and the influence degree brought by the initially failed branch on the other branches. The analysis and discuss will provide a certain foundation for further study.