The high percentage of photovoltaic(PV)access to the distribution network brings reverse heavy overload risk to the distribution network,which affects the safe and stable operation of the distribution network.In order to accurately evaluate the reverse heavy overload risk of each voltage level in the distribution network with high proportion of PV ac-cess and to analyze the sources of reverse heavy overload risk,firstly,a"station-feeder-substation"reverse heavy overload risk assessment index system is established for the distribution network with high proportion of PV ac-cess.Secondly,a combined weighting method based on entropy weighting and hierarchical analysis is used to assign weights to each index.Finally,the effectiveness of the proposed method is verified by simulating a distribution network case based on an actual network topology improvement in Hunan.In addition,the proposed method can be adopted to ef-fectively analyze the reverse heavy overload risk situation of distribution network under different distributed PV access locations,which has reference significance for power system risk assessment and management.
关键词
反向重过载/风险评估/分布式光伏/多电压等级/熵权法/层次分析法/组合赋权法
Key words
reverse heavy overload/risk assessment/distributed photovoltaic/multiple voltage levels/entropy weight method/analytic hierarchy process/combinatorial weighting
维普
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