摘要
针对配电网三相潮流问题计算精确性和计算速度要求,提出了一种单–三相混合配电网潮流计算模型及算法。首先推导了电网三相潮流计算模型,然后根据配网不确定性特点,对局部的对称部分采用单相潮流计算,对于不对称部分采用三相潮流计算,2部分网络之间通过单–三相接口进行连接,从而实现单相网络与三相网络的统一建模;进而基于线路电流的不平衡度,自动确定单–三相接口的位置。算例证明了所提出的单–三相混合配电网潮流计算方法和动态接口策略的有效性和正确性。
In order to meet the requirements for computational accuracy and efficiency of three-phase power flow of distribution network,this paper proposes a model and algorithm for single-three phase hybrid power flow calculation of distribution network.Firstly,the calculation model of three-phase power flow is deduced.Then,considering the uncertainties of distribution network,the three-phase model is used for the part where significant unbalance exists,while the single-phase model is used for the part where unbalance is negligible.These two parts of network are interconnected through a single-three phase interface,realizing the unified modelling for the single-phase network and the three-phase network.Finally,the location of the interface between the single and three-phase parts is automatically determined based on the unbalanced degree of line current.The case study result has verified the feasibility and efficiency of the proposed single-three phase hybrid power flow calculation method and the dynamic selection strategy of interfaces.
作者
杨磊
罗萍萍
王高猛
刘阳升
YANG Lei;LUO Pingping;WANG Gaomeng;LIU Yangsheng(College of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China;College of Electronic and Information Engineering,Tongji University,Shanghai 201804,China)
出处
《中国电力》
CSCD
北大核心
2019年第1期102-109,共8页
Electric Power
关键词
配电网
三相潮流
单–三相混合潮流
单–三相接口
不平衡度
distribution network
three-phase power flow
single-three phase hybrid power flow
single-three phase interface
unbalance index
