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高比例光伏接入的配电网多层级反向重过载风险评估

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随着高比例光伏接入配电网,愈加复杂的潮流分布给配电网带来反向重过载风险,影响配电网安全稳定运行.为准确评估高比例光伏接入下配电网各电压等级的反向重过载风险大小、明析反向重过载风险来源,首先建立了高比例光伏接入的配电网"台区-馈线-变电站"反向重过载风险评估指标体系;其次,采用基于熵权法和层次分析法的组合赋权法为各指标赋权;最后,对基于湖南某地实际网络拓扑改进的配电网案例进行仿真分析,验证了所提方法的有效性.此外,所提出的方法能有效分析不同分布式光伏接入位置下的配电网反向重过载风险情况,对电力系统风险评估及治理具有参考意义.
Multi-level Reverse Heavy Overload Risk Assessment for Distribution System with High Percentage of Photovoltaic Access
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.

reverse heavy overloadrisk assessmentdistributed photovoltaicmultiple voltage levelsentropy weight methodanalytic hierarchy processcombinatorial weighting

于雨彤、王灿、李勇、刘嘉彦、郭钇秀、曹一家

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湖南大学电气与信息工程学院,长沙 410082

国网湖南省电力有限公司电力科学研究院,长沙 410007

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

国家重点研发计划政府间国际科技创新合作重点项目国家自然科学基金国网湖南省电力有限公司电力科学研究院科技项目长沙市自然科学基金

2022YFE0129300U22B2001345216A522000Bkq2208028

2024

10.13336/j.1003-6520.hve.20230527

高电压技术
中国电力科学研究院　中国电机工程学会

高电压技术

CSTPCD北大核心
影响因子：2.32
ISSN：1003-6520
年,卷(期)：2024.50(10)