不平衡主动配电网综合直接潮流算法  

A Comprehensive Direct Load Flow Algorithm for Unbalanced Active Distribution Networks

作　　者：符杨 刘冀宁 周晓鸣 苏向敬 米阳 田书欣 FU Yang;LIU Jining;ZHOU Xiaoming;SU Xiangjing;MI Yang;TIAN Shuxin(School of Electrical Engineering,Shanghai University of Electric Power,Yangpu District,Shanghai 200090,China)

机构地区：[1]上海电力大学电气工程学院,上海市杨浦区200090

出　　处：《电网技术》2020年第6期2281-2288,共8页Power System Technology

基　　金：上海市浦江人才计划项目(17PJ1403000)。

摘　　要：由于线路的不对称性分布以及负荷、分布式电源的不对称随机接入,配电网具有显著的三相不对称特征;分布式电源的高渗透不仅直接影响其接入层网络,同时对其上层网络产生影响;高随机性和波动性可再生能源的广泛应用,让具有更高可靠性的配电网弱环网拓扑结构受到了更多关注。上述新挑战对配电网潮流算法的功能和性能提出了更高要求。为此基于传统直接法潮流,通过对主动配电网关键元件(配电变压器和分布式电源)进行模型构建并计及不同网络拓扑结构的影响,提出了一种不平衡主动配电网的综合直接潮流算法。所提算法不仅继承了传统直接法潮流优越的计算性能,同时拓展了其应用范围以有效求解含多电压等级、多网络拓扑与多分布式电源类型的不平衡主动配电网潮流问题。最后,基于IEEE典型算例和澳大利亚真实配电网进行仿真分析,对文中所提综合直接潮流算法的功能和性能进行验证。Due to asymmetry arrangement of feeders and uneven and random connection of load and distributed generators(DG),distribution networks are featured with three-phase unbalance.High penetration of DGs not only directly affects connected network,but also indirectly influences upstream networks.Furthermore,the widespread integration of highly intermittent and uncertain renewable energy calls for more attention to weakly meshed network topology.The emerging challenges above imposes higher requirement on the function and performance of distribution load flow.Therefore,this paper proposed a comprehensive direct load flow algorithm for unbalanced active distribution networks based on traditional direct load flow algorithm and detailed modeling of critical components(distribution transformer and DG),considering the impacts of network topologies.The proposed algorithm inherits the superior accuracy and efficiency of traditional direct load flow algorithm,and widely expands its applicability for unbalanced active distribution networks with multi-voltage levels,multi-network topologies and multi-DG types.Finally,the proposed comprehensive direct load flow algorithm is tested on both IEEE test feeder and a real Australian distribution network over 24 hours.

关 键 词：主动配电网 三相不平衡 多电压等级 潮流计算 弱环网 

分 类 号：TM721[电气工程—电力系统及自动化]