基于同伦法和改进的牛顿—拉夫逊法相结合的直流网络潮流分析

发布时间：2018-01-29 21:55

本文关键词： 直流网络改进的牛顿—拉夫逊法同伦法潮流分析　出处：《水电能源科学》2015年12期 　论文类型：期刊论文

【摘要】：鉴于直流网络潮流算法的研究总体上尚处于起步阶段,特别是在收敛速度和初值选取方面仍存在缺陷,从网络分析角度出发建立直流网络方程组,在分析直流网络潮流模型的基础上进行变量分类,推演出改进的直流网络潮流算法。该算法利用同伦方法的全局收敛性获取网络的初始值,并结合改进的牛顿-拉夫逊法快速收敛到稳定解,使其同时满足计算稳定性和收敛速度的要求,适用于直流系统的在线计算和分析。算例仿真分析表明,该算法对初值要求低、收敛速度快,结果正确有效。
[Abstract]:In view of the fact that the research of DC network power flow algorithm is still in its infancy, especially in the aspect of convergence speed and initial value selection, the DC network equations are established from the angle of network analysis. Based on the analysis of DC network power flow model, the improved DC network power flow algorithm is derived by classifying variables. The algorithm uses the global convergence of homotopy method to obtain the initial value of the network. The improved Newton-Raphson method converges quickly to the stable solution, which can satisfy the requirements of both computational stability and convergence speed. It is suitable for the on-line calculation and analysis of DC system. The simulation results show that the proposed method can be applied to the on-line calculation and analysis of DC system. The algorithm has the advantages of low initial value, fast convergence rate and correct and effective results.
【作者单位】：武汉大学电气工程学院;
【分类号】：TM744
【正文快照】： 1　引言直流电网是指换流器直流端互联所构成的网格化结构电网[1],不仅可用于连接交流电网和分布式可再生能源,还可以作为主干网络进行大规模长距离电能传输形成覆盖系统,欧洲、美国、日本等都已对此提出相应规划[2]。其中,潮流分析作为直流电网设计和实际运行时最重要的基础

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