Three-Phase Decoupled Power Flow Algorithm for Active Distribution Networks
Yang Xiong1, 2, Wei Zhinong1, Sun Guoqiang1, Sun Yonghui1, Yang Yongbiao3, Chen Lu3
1. Hohai University Nanjing 210098 China; 2. Jiangsu Electric Power Company Research Institute Nanjing 211103 China; 3. NARI Technology Development Limited Company Nanjing 211106 China
Abstract With the development of active distribution network technologies and the connection of large-scale distributed generations (DGs) to active distribution networks, the traditional power flow methods are difficult to meet power flow calculation for active distribution networks. Therefore, in this paper, a three-phase decoupled power flow algorithm for active distribution networks is proposed, which has high efficiency of processing multi-type large-scale DGs and meshed networks. The pro- posed algorithm uses the sequence component analysis approach and the three-sequence decoupling- compensation models of unsymmetrical branches, and combines the special topological structure of active distribution network with the path-loop analysis approach. The power flow models of the large-scale PQ-node, PQ(V)-node, PV-node and PI-node type DGs and the var compensators are derived in detail, and the three-phase decoupled power flow can be parallel calculated with smaller CPU time and less memory space. The results of IEEE 37-bus, 69-bus and 123-bus test systems verify the effectiveness and good convergence of the proposed algorithm. Meanwhile, it is shown that the proposed algorithm has strong ability to process multi-type large-scale DGs and meshed networks, and is superior to the traditional algorithms.
Yang Xiong,Wei Zhinong,Sun Guoqiang等. Three-Phase Decoupled Power Flow Algorithm for Active Distribution Networks[J]. Transactions of China Electrotechnical Society, 2016, 31(2): 186-195.
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