中国电力2024，Vol.57Issue(8)：117-129,13.DOI:10.11930/j.issn.1004-9649.202309007
高比例分布式电源配电网中低压柔性互联协调规划
Coordinated Planning of Medium-Voltage and Low-Voltage Flexible Interconnection for Distribution Networks with High Proportion of Distributed Generation
摘要
Abstract
Flexible interconnection technology is one of the effective means to solve numerous problems faced by distribution networks with high proportion of distributed generations(DGs).A multi-layer optimization based coordinated planning method for medium-voltage and low voltage flexible interconnection of distribution networks is proposed.Firstly,a power flow model for distribution network with medium-voltage and low-voltage flexible interconnection based on power electronics flexible interconnected devices(FID)is built.Then,a three-layer coordinated planning model is constructed.With the upper layer aiming to minimize the annual operating cost of low-voltage FIDs and the annual variance of transformer load rate in substation areas,and the middle layer aiming to minimize the annual operating cost of medium voltage FIDs and the annual electricity purchasing cost from the higher-level power grid,they respectively determine the installation location and capacity of low-voltage and medium-voltage FIDs.The lower layer optimizes the system operation with the goal of minimizing the electricity purchasing cost from the higher-level power grid in each scenario.A hybrid algorithm based on adaptive particle swarm optimization and second-order cone programming is adopted for solution.Finally,an IEEE-33 node distribution network with a high proportion of DGs is used for case study,and the results indicate that through flexible interconnection planning,the annual comprehensive operating cost of the example system is reduced by 19.01%and the annual variance of transformer load rate in substation areas is reduced by 82.59%,showing the effectiveness of the proposed planning model.关键词
分布式电源/中低压柔性互联/协调规划/电力电子柔性互联设备/台区变压器负载率Key words
distributed generation/medium-voltage and low-voltage flexible interconnection/coordinated planning/power electronics flexible interconnection device/transformer load rate in substation area引用本文复制引用
彭寒梅,尹棠,肖千皓,谭貌,苏永新,李辉..高比例分布式电源配电网中低压柔性互联协调规划[J].中国电力,2024,57(8):117-129,13.基金项目
国家自然科学基金资助项目(51777179) （51777179）
湖南省自然科学基金资助项目(2023JJ50241).This work is supported by National Natural Science Foundation of China(No.51777179),Natural Science Foundation of Hunan Province(No.2023JJ50241). （2023JJ50241）
