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考虑等效拟合特性的输配电网全局潮流计算方法 被引量:3

Global Power Flow Calculation Method for Transmission and Distribution Network Considering Equivalent Fitting Characteristics
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摘要 为缩短大规模输配网潮流计算所需的收敛时间,本文首次提出了基于配网潮流特性等效拟合的输配网全局潮流计算方法。首先,详细分析配电网等效拟合的原理,构建考虑电压功率特性的配网潮流拟合函数;然后建立主从分裂与主从合并交替使用的输配网潮流计算模型,其计算过程将主从迭代与配网潮流拟合迭代相结合,在迭代过程中求解拟合函数,并可不断修正其参数,缩小拟合误差。该方法以配网拟合结果和主从迭代精确结果交替作为边界点协调信息,无需每次潮流计算都进行主从迭代,减少了潮流计算量,加快了潮流收敛,计算结果精度高。仿真算例验证了所提方法的可行性和有效性。适用于当前规模庞大的输配网全局潮流计算。 In order to shorten the convergence time cost in the power flow calculation of large-scale transmission and distribution network,a method for calculating the global power flow of the transmission and distribution network based on the equivalent fitting of the distribution network power flow is presented in this paper.Firstly,the principle of equivalent fitting of distribution network is analyzed in detail,and the fitting function of distribution network power flow is established.Then,the power flow calculation model of the transmission and distribution network with master-slave splitting and master-slave merging is built.The master-slave iterations are combined with the fitting iteration of the distribution network,the fitting function is solved in the iterative process,and the parameters can be corrected and the fitting error is reduced.In this method,the fitting result of the distribution network and the exact result of the master-slave iterations are taken as the coordination information for boundary points.Thus the masterslave iteration does not needed in each power flow calculation,which reduces the amount of the power flow,accelerates the convergence speed of the power flow and has high accuracy.The simulation results show that the proposed method is feasible and effective,which is suitable for the current global power flow calculation of large scale distribution network.
作者 俞龙飞 曾江 丘国斌 欧阳森 YU Longfei;ZENG Jiang;QIU Guobin;OUYANG Sen(School of Electric Power,South China University of Technology,Guangzhou 510640,China)
出处 《现代电力》 北大核心 2018年第4期52-58,共7页 Modern Electric Power
基金 广东省自然科学基金项目(2016A030313476)
关键词 输配网潮流 主从分裂 配网潮流拟合 分解协调 transmission and distribution network flow master and slave splitting method fitting of distribution net-work power flow decomposition-coordination method
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