电力系统保护与控制2024，Vol.52Issue(9)：16-26,11.DOI:10.19783/j.cnki.pspc.231041
灾害天气下计及一二次设备耦合故障的电网短时风险评估
Short-time risk assessment of a power grid in weather disasters considering the coupled faults of primary and secondary equipment
摘要
Abstract
The short-time multiple faults occurring in a power grid in a weather disaster may exceed the preset reaction ability of the protection system,and the coupling effect of primary and secondary equipment will promote the development and spread of multiple fault risk.Thus this paper proposes a short-time risk assessment method considering the coupled faults of primary and secondary equipment.First,the interaction between primary and secondary equipment and its impact on the short-time operational risk of the power grid are analyzed.Second,the fault probability model of primary and secondary equipment is constructed,especially focusing on the failure-to-trip probability of protection with regard to coupled faults of primary and secondary equipment.Then,combined with the reaction ability of the protection system to unexpected faults,a short-time multi-fault risk assessment method is proposed.Finally,the proposed method is validated using a modified IEEE39-node system.The results show that,under the influence of external meteorological environment,unexpected actions caused by the exposure of defects in the protection system make the multiple fault risk in the grid more serious.This comprehensive consideration of short-time operational risk can be useful for identifying and eliminating weak points in protection systems and formulating risk-reduction operational strategies for power grids.关键词
电力系统/灾害天气/多重故障/耦合故障/短时风险评估Key words
power system/weather disaster/multiple faults/coupled fault/short-time risk assessment引用本文复制引用
王建,熊张忞,南东亮,张路,欧阳金鑫..灾害天气下计及一二次设备耦合故障的电网短时风险评估[J].电力系统保护与控制,2024,52(9):16-26,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.52277079). 国家自然科学基金项目资助(52277079) （No.52277079）
重庆市出站留(来)渝博士后择优项目资助(2020LY23) （来）
