基于支路功率灵敏度分析的柔性配电网智能软开关优化配置  

Optimal Configuration of SOP in Flexible Distribution Network Based on Branch Power Sensitivity Analysis

作　　者：孙嘉 韩顺天 倪良华[1] 吕干云[1] SUN Jia;HAN Shuntian;NI Lianghua;LÜGanyun(School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu,China)

机构地区：[1]南京工程学院电力工程学院,江苏南京211167

出　　处：《电气传动》2025年第4期41-47,55,共8页Electric Drive

基　　金：江苏“六大人才高峰”创新团队项目(2019-TD-XNY004);江苏省高等学校自然科学研究重大项目(2019052)。

摘　　要：大量分布式电源(DG)不断接入配电网中,易引发电压越限和网络阻塞等问题;智能软开关(SOP)可以快速实现柔性互联和功率调节,能够有效解决DG接入带来的问题。考虑优先在有功功率受负荷影响大的支路上装设SOP,提出一种基于支路有功功率灵敏度分析的智能软开关选址定容策略。首先在潮流方程中引入负荷增长因子,理论推导反映DG出力及负荷时序变化特性的支路功率灵敏度,按照其值大小进行SOP选址排序;其次建立了SOP选址定容优化模型,采用二阶锥算法求解;最后,在改进的IEEE 33节点配电系统上进行验证。算例结果表明,所提出的方法可有效节省配电网年度综合运行成本,降低系统网络损耗,改善节点电压偏差。While a large number of distributed generator(DG)keep penetrating into distribution networks,the problems such as voltage violation and network power congestion become more and more serious.Soft open point(SOP)can quickly achieve flexible interconnection and accurate power flow control,effectively addressing the challenges caused by the integration of DG.Considering the installation priority of SOP on branches where active power is heavily affected by loads,an intelligent soft switch site slection and capacity determination strategy based on branch active power sensitivity analysis was proposed.Firstly,a load growth factor was introduced into the power flow equations,and the branch power sensitivity,which reflects time series variation of DG output and load,was theoretically derived.The selection of SOP sites was then ranked according to this sensitivity value.Secondly,the model of SOP site slection and capacity optimization was established,which was solved using a second-order cone algorithm.Finally,validation was conducted on the improved IEEE 33 node distribution system.Results show that the proposed method can affectively save annual comprehensive operation cost of distribution networks,reduce system network losses and improve node voltage deviation.

关 键 词：柔性配电网 支路功率灵敏度 智能软开关 选址定容 二阶锥规划 

分 类 号：TM7[电气工程—电力系统及自动化]