中国电力 ›› 2019, Vol. 52 ›› Issue (1): 102-109.DOI: 10.11930/j.issn.1004-9649.201801054

• 电网 • 上一篇    下一篇

配电网单-三相混合潮流计算模型及算法

杨磊1, 罗萍萍1, 王高猛2, 刘阳升3   

  1. 1. 上海电力学院 电气工程学院, 上海 200090;
    2. 天津大学 智能电网教育部重点实验室, 天津 300072;
    3. 同济大学 电子与信息工程学院, 上海 201804
  • 收稿日期:2018-01-09 修回日期:2018-07-24 出版日期:2019-01-05 发布日期:2019-01-14
  • 作者简介:杨磊(1994-),女,硕士研究生,从事配电网规划研究,E-mail:819075652@qq.com;罗萍萍(1967-),女,通信作者,副教授,硕士生导师,从事配电自动化及规划、电力系统控制与保护研究,E-mail:luopingping@shiep.edu.cn;王高猛(1992-),男,硕士研究生,从事电力系统的优化与控制、配电自动化研究,E-mail:18720981412@163.com;刘阳升(1987-),男,博士研究生,从事电力系统状态估计,E-mail:ys0772@126.com

Method of Distribution Network Three-Phase Power Flow Calculation Based on a Hybrid Single-Three Phase Model

YANG Lei1, LUO Pingping1, WANG Gaomeng2, LIU Yangsheng3   

  1. 1. College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China;
    2. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China;
    3. College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China
  • Received:2018-01-09 Revised:2018-07-24 Online:2019-01-05 Published:2019-01-14

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。

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

Abstract: 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.

Key words: distribution network, three-phase power flow, single-three phase hybrid power flow, single-three phase interface, unbalance index

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