Power Flow Calculation of Island Micro-grid Based on Auxiliary Factors Two-step Algorithm

被引：0
|
作者：
Lin L. [1 ]
Dong S. [1 ]
Zhu C. [2 ]
Tang K. [1 ]
Song Y. [1 ,3 ]
机构：
[1] College of Electrical Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang Province
[2] State Grid Zhejiang Electric Power Company, Hangzhou, 310007, Zhejiang Province
[3] State Key Laboratory of Internet of Things for Smart City, Department of Electrical and Computer Engineering, University of Macau
来源：
Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 10期
关键词：
Auxiliary factors two-step algorithm; Droop control; Islanded micro-grid; Power flow;
D O I：
10.13335/j.1000-3673.pst.2019.1942
中图分类号：
学科分类号：
摘要：
In islanded micro-grids with droop control, the system voltages and frequency are regulated by the droop nodes, so that the traditional power flow calculation is no longer applicable. Aiming at the characteristics of active power-frequency/reactive-voltage droop control strategy in islanded micro-grids, this paper constructed the power flow calculation model of islanded micro-grids and proposed an auxiliary factors two-step solution algorithm to solve the problem. The algorithm introduced two auxiliary factors, transforming the original power flow equation into a set of over-determined equations, a set of underdetermined equations and a set of functions between auxiliary factors, and iteratively solved them in two steps. In the first step, based on the transformed equation a least-squares problem was constructed to find a linearization point that was closer to the final solution than the current iteration values, so as to improve the robustness of the algorithm to the initial value. In the second step, the next iteration step variable values were directly solved to reduce the computational complexity. The comparison analysis of a large 115-nodes micro-grid case shows that the proposed algorithm has fast convergence and strong robustness. © 2020, Power System Technology Press. All right reserved.
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收藏
页码：3955 / 3962
页数：7
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