Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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基于故障影响范围的风险场景筛选方法

来源:电工电气发布时间:2023-03-04 10:04 浏览次数:213

基于故障影响范围的风险场景筛选方法

裴超1,王大磊2,马骁1,夏彦1,王曼1,张凌跃1,汪昌霜1
(1 国网重庆市电力公司市北供电分公司, 重庆 401147;
2 国网重庆市电力公司市区供电分公司, 重庆 400015)
 
    摘 要:在电网风险评估中,需要考虑的风险场景众多,特别是多重故障场景数量巨大,给风险评估指标的在线计算造成了严重困难。提出了一种基于故障影响范围的风险场景筛选方法,该方法将存在支路越限的 N-1 故障和存在解列情况的 N-2 故障归入风险场景集,并基于支路开断因子确定 N-1 故障影响范围;分析了各 N-2 故障的故障影响范围交叠情况,在此基础上采用快速潮流计算,根据是否存在支路潮流越限筛选得到风险场景集。仿真算例表明,上述方法可大幅提升风险场景,特别是多重故障风险场景的辨识速度,更好满足了在线风险评估的应用要求。
    关键词: 电网风险评估;多重故障;快速潮流计算;风险场景筛选
    中图分类号:TM711     文献标识码:A     文章编号:1007-3175(2023)02-0029-05
 
A Risk Contingencies Selection Method Based on Fault Influence Range
 
PEI Chao1, WANG Da-lei2, MA Xiao1, XIA Yan1, WANG Man1, ZHANG Ling-yue1, WANG Chang-shuang1
(1 State Grid Chongqing Electric Power Company Shibei Power Supply Company, Chongqing 401147, China;
2 State Grid Chongqing Electric Power Company Shiqu Power Supply Company, Chongqing 400015, China)
 
    Abstract: A lot of risk scenarios need to be considered in power grid risk assessment, especially there are huge numbers of multi-contingencies scenarios which have caused serious problems for online calculation of risk assessment indicators.The paper proposes a risk contingencies selection method according to fault influence range. It includes N-1 faults with branch out-of-limit and N-2 faults with splitting into the risk scenario set and determines the influence range of N-1 faults based on the branch outage factor.Besides, it also analyzes the overlapping of fault influence ranges of N-2 faults, which is the basis of selecting risk scenario sets according to the existence of a branch flow out of limit through fast power flow calculation. The simulation results show that this method can significantly improve the identification speed of multi-contingencies risk scenarios and meet the requirements of online risk assessment in a better way.
    Key words: power grid risk assessment; multi-contingencies; fast power flow calculation; risk contingencies selection
 
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