Three-phase power flow calculation of medium-low voltage distribution network considering grounding impedance and containing various distributed generators, part II: algorithm and case study

被引：0
作者：
Gao Y. [1 ]
Wang C. [1 ]
Xin J. [2 ]
Liu A. [1 ]
Chen Y. [1 ]
机构：
[1] Department of Electrical and Automatic Engineering, Nanchang University, Nanchang, 330031, Jiangxi Province
[2] State Grid Jiangxi Electric Power Research Institute, Nanchang, 330096, Jiangxi Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2016年 / 36卷 / 14期
基金：
中国国家自然科学基金;
关键词：
Distributed generation; Distribution network; Hybrid medium-low voltage distribution system; Injection current; Newton-Rapshon method; Three-phase power flow;
D O I：
10.13334/j.0258-8013.pcsee.150823
中图分类号：
学科分类号：
摘要：
Newton-rapshon power flow calculation method based on the current injection and example analysis were given. The construction method of the power flow equation of endpoint components was described, and the method for combining the six control equations of three-phase DG with the imbalance equations of node injection current was detailed. At the same time, the formula for calculating the element of Jacobi matrix was also derived. Multiple IEEE sample systems were used to verify the proposed model and algorithm in the Matlab platform. The calculation precision of the proposed method was compared with the one reported in the existing literature and commercial software, and the influence of grounding impedance of low-voltage distribution network on neutral point voltage and the neutral line current was also analyzed. Based on IEEE37 sample system, a hybrid medium-low voltage distribution system, which contains three-phase three-wire system medium-voltage distribution network, three-phase four-wire low-voltage distribution networks and various types DG, was constructed. The constructed hybrid medium-low distribution system was applied to further test the proposed method, and the influence of the transformer zero sequence excitation impedance on system unbalance was also investigated. © 2016 Chin. Soc. for Elec. Eng.
引用
收藏
页码：3707 / 3716
页数：9
相关论文
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