Cascading failure analysis of power system considering current carrying capability degradation of aging lines

被引：0
|
作者：
Zhou Y. [1 ]
Hu B. [1 ]
Shao C. [1 ]
Huang W. [1 ]
Xie K. [1 ]
机构：
[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 11期
基金：
中国国家自然科学基金;
关键词：
aging; cascading failure path; current carrying capability; electric power systems; outage probability;
D O I：
10.16081/j.epae.202302017
中图分类号：
学科分类号：
摘要：
The long-term aging effect leads to the degradation of current carrying capacity of transmission lines and the increase of aging failure risk，which will further worsen the risk of cascading failure. The aging effect of transmission lines on the cascading failure of the power systems is investigated. Based on the heat balance theory，the calculation model of the current carrying capability dependent on the aging of transmission lines is established，and the numerical correspondence between the current carrying capability and the operation year of transmission lines is expounded. On this basis，considering the aging effect of real-time power flow and transmission lines，a three-dimension mapping relationship including real-time power flow，operation year and outage probability is established，and the dynamic outage probability model of trans⁃ mission lines is enhanced. Then，by introducing probabilistic threshold parameter，an improved cascading path search criterion based on outage probability model is established. Guided by the maximum probabilistic coupling event in the evolution process of cascading faults，the representative fault paths are screened while the low probability cascading failure paths are filtered. An example study is carried out by the improved IEEE 39-bus system. The numerical results indicate that after considering the aging effect of the transmis⁃ sion line，the number of cascading failure events triggered by single line accidents increases，the probability increases，the corresponding path order increases，and the risk of system cascading failure increases signifi⁃ cantly，indicating that there is a significant correlation between the aging effect of the transmission line and the consequence of cascading failure. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：188 / 194
页数：6
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