摘要
针对独立运行模式下配电台区源荷特性差异引发的光伏功率倒送和变压器重载运行等问题,提出了区域配网的台区柔性互联规划方法。首先,分析基于VSC的台区柔性互联拓扑结构及运行模式,建立其功率流动模型。其次,根据台区运行特性提出配电台区的互联需求指标,并以此为基础提出区域配网的台区可联性分析方法。然后,以整个区域配网为研究对象,建立台区柔性互联方案以及互联装置配置的双层规划模型,上层模型求解最优规划方案,下层模型实现系统的经济运行。模型采用基于模拟退火和锥规划的混合优化算法求解。最后,在40节点算例上对所提规划模型进行验证,通过规划前后配电系统成本、光伏消纳率以及台区变负载率的对比分析,证明了该模型在提升区域配网的经济性和运行效率方面的有效性。
Aiming at the problems of photovoltaic power reverse and transformer overload operation caused by the difference of source and load characteristics in distribution station areas under independent operation mode,a flexible interconnection planning method for distribution station area of regional distribution network is proposed.Firstly,the VSC-based flexible interconnection topology and operation mode are analyzed,and its power flow model is established.Secondly,according to the operation characteristics of distribution station area,the interconnection demand index is put forward,and on this basis,the distribution station area connectivity analysis method of regional distribution network is proposed.Then,taking the whole regional distribution network as research object,a bilevel planning model of the flexible interconnection scheme and interconnection device configuration is established.The upper level model solves the optimal planning scheme,and the lower level model realizes the economic system operation.The model is solved by a hybrid optimization algorithm based on simulated annealing and cone programming.Finally,the proposed planning model is verified on a 40-node example.The comparative analysis of distribution system cost,photovoltaic absorption rate and transformer load rate before and after planning verifies the effectiveness of this model in improving the economy and operation efficiency of regional distribution network.
作者
曹昉
郑金钊
郑怡馨
CAO Fang;ZHENG Jinzhao;ZHENG Yixin(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)
出处
《南方电网技术》
CSCD
北大核心
2023年第1期14-25,共12页
Southern Power System Technology
基金
中央高校基本科研业务费专项资金资助(2022JG004)。
关键词
分布式光伏
台区柔性互联
双层规划
配电网优化
distributed photovoltaic
flexible interconnection of distribution station areas
bilevel planning
distribution network optimization
