基于二阶锥优化的交直流系统多目标最优潮流研究  

Research on multi-objective optimal power flow of AC/DC system based on second-order cone optimization

作　　者：辛业春[1] 张一峰 徐广健 Xin Yechun;Zhang Yifeng;Xu Guangjian(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,Jilin,China)

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《电测与仪表》2021年第9期48-56,共9页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51607032)。

摘　　要：为解决广域大范围内新能源的并网和消纳问题,柔性直流电网技术得到了快速的发展,已经发展成为了直流环网的形式。直流环网具有多条冗余线路,能更好更灵活地调度各发电单元和线路之间传输的功率。针对柔性直流电网的特点,提出一种基于二阶锥优化和超效率数据包络分析法的交直流互联系统最优潮流计算方法。基于含VSC-HVDC的交直流系统稳态模型,建立了综合考虑环境因素和系统网络损耗的多目标最优潮流模型;采用二阶锥和IPOPT(内点法)相结合的交替求解方法将其转化为二阶锥凸优化问题;再通过SE-DEA从Pareto最优解集中选取出有效近似度最高的有效折中解。基于修改的IEEE 14、IEEE 30节点算例结果验证了所提方法的有效性、准确性,能够很好地解决含VSC-HVDC交直流系统最优潮流问题。In order to solve the problem of grid-connection and consumption of new energy in a wide area,the flexible DC grid technology has developed rapidly and has developed into a form of DC ring network.The DC ring network has multiple redundant lines,which can better and more flexibly schedule the transmitted power between each power generation unit and the line.Aiming at the characteristics of flexible DC grid,an optimal power flow calculation method based on second-order cone optimization and super-efficiency data envelopment analysis is proposed in this paper.Firstly,based on the steady-state model of AC/DC system with VSC-HVDC,a multi-objective optimal power flow model considering environmental factors and system network loss is established.Then,the second-order cone and internal point method(IPOPT)are combined to solve the second-order cone-convex optimization problem.Finally,the effective compromise solution,which is with the highest effective approximation degree,can be selected from the Pareto optimal solution which is set by the SE-DEA.Based on the modified IEEE 14 and IEEE 30-node examples,the effectiveness and accuracy of the proposed method are verified,which can solve the optimal power flow problem of VSC-HVDC AC/DC system.

关 键 词：交直流系统 VSC-HVDC 多目标最优潮流 换流器损耗 二阶锥优化 

分 类 号：TM743[电气工程—电力系统及自动化]