摘要
【目的】为实现低压台区柔性互联装置的合理规划,有效解决台区负载不均衡问题,提升配电网供电能力,提出一种考虑配电网负荷分布特征的供电能力评估方法,建立了一种综合考虑配电网供电能力、建设效率以及经济性的低压台区柔性互联装置规划模型。【方法】首先,建立了负荷迭代增长的配电网供电能力计算模型,并得出了配电网供电能力提升效率的评估指标。其次,建立了柔性互联装置规划框架,以供电能力指标和经济性最优为目标函数,并计及配网重构下的负荷转供约束,基于非支配排序遗传算法(non-dominated sorting genetic algorithms-II,NSGA-II)进行求解。【结果】通过含联络开关的IEEE 14节点配电网进行算例分析,结果表明基于所提评估指标的规划模型能有效提升配电网在实际负荷分布下的供电能力。【结论】与传统供电能力指标相比,所提指标能够有效反映台区实际负荷分布和增长的客观规律;基于所提指标的规划方法能够显著提升配电网的供电能力;所提指标表明,低压台区柔性互联装置的接入能够逐步消除台区负载率不均衡导致的供电瓶颈,实现配电网资源的高效利用。
[Objective]To realize the reasonable planning of low-voltage flexible interconnection devices,effectively solve the problem of load imbalance in distribution station areas,and improve the supply capability of distribution networks,a supply capability assessment method considering the load distribution characteristics of distribution networks is proposed.Furthermore,a flexible interconnection device planning model for low-voltage distribution station areas that comprehensively considers the power-supply capability,construction efficiency,and economy of distribution networks is proposed.[Methods]First,a model of the distribution network supply capability with load growth is established,and an evaluation index for the efficiency of distribution network supply capability improvement is derived.Next,a flexible interconnection device planning framework considering the improvement of supply capability,economy,and load transfer constraints under distribution network reconfiguration is established and solved based on the non-dominated sorting genetic algorithms-II.[Results]The results of the case study of the IEEE 14 bus system with contact switches show that the planning model based on the proposed indicators can effectively improve the supply capability of the distribution network under actual load distribution.[Conclusions]Compared with traditional power-supply capacity indicators,the indicators proposed in this study can effectively reflect the objective law of actual load distribution and growth in the station areas.The planning method based on the proposed indicators can significantly improve the power-supply capacity of the distribution network.The proposed indicators show that the access of flexible interconnection devices in low-voltage station areas can gradually eliminate the bottlenecks of power supply caused by the imbalance of the load ratio in station areas and realize the efficient use of distribution network resources.
作者
张锐
刘恒超
张国驹
葛雪峰
于淼
ZHANG Rui;LIU Hengchao;ZHANG Guoju;GE Xuefeng;YU Miao(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;State Grid Jiangsu Electric Power Company,Nanjing 210024,China)
出处
《电力建设》
北大核心
2025年第8期1-11,共11页
Electric Power Construction
基金
国家重点研发计划资助项目、国家电网有限公司科技项目资助“配电网高功率密度柔性互联技术和装备”(2023YFB2407400)。
关键词
低压配电网
配电台区
供电能力
柔性互联
电力规划
low-voltage distribution network
distribution station areas
power-supply capacity
flexible interconnection
power planning
