摘要
集成优化是多端直流(MTDC)系统的关键技术之一。该文面向低压三端直流系统提出一种提升运行边界的集成参数优化配置方法。首先建立三端MTDC系统等效电路及其特性模型,分析集成参数对系统运行边界的影响;然后,以稳定区域与设计区域的面积差最小、集成成本最低为优化目标,提出集成参数多目标优化模型。最后采用第二代非支配排序遗传算法(NSGA-II)对模型求解帕累托(Pareto)最优解集,并通过模糊聚类算法筛选出集成参数优化配置方案。对算例进行仿真分析,研究结果表明,所提方法有效可行,能够在保障系统经济性的前提下,显著提升三端MTDC系统运行边界。
Integration optimization is one of the key technologies for multi-terminal DC(MTDC)system.In this paper,an integrated parameter optimization configuration method for improving operational boundary is proposed for the three-terminal DC system.Firstly,the equivalent circuit and its characteristic model of MTDC system are established,and the influence of integrated parameters on system operational boundary is analyzed.Secondly,an integrated parameter multi-objective optimization model is proposed with the optimization goals of the smallest acreage difference between the stable area and the design area,and the lowest integration cost.Finally,the Pareto optimal solution set is solved by the NSGA-Ⅱalgorithm,and the integrated parameter optimization configuration scheme is selected by the fuzzy clustering algorithm.The simulation analysis shows that the proposed method is effective and feasible,which can significantly improve the operational boundary of MTDC system while ensuring the system economics.
作者
邓卫
裴玮
张释中
孔力
Deng Wei;Pei Wei;Zhang Shizhong;Kong Li(Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190 China;University of Chinese Academy of Sciences,Beijing 100049 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第8期1705-1715,共11页
Transactions of China Electrotechnical Society
基金
国家科技部重点研发专项(2017YFB0903300)
中国科学院洁净能源先导科技专项(XDA 21050100)
中科院前沿科学重点研究(QYZDBSSW-JSC024)资助项目。
关键词
多端直流
系统集成
参数配置
运行边界
多目标优化
Multi-terminal DC
system integration
parameter configuration
operational boundary
multi-objective optimization
