配电网潮流算研法究.doc

内 容 摘 要 配电网的潮流计算是配电网络分析的一项重要内容，它是对配电系统规划设计和运行方式的合理性，可靠性及经济性进行定量分析的重要依据。配电网潮流计算还是配电系统的电压/无功优化调度，操作模拟和接线变化分析等的基础。当前已有的电网分析软件大多是针对输电网开发出来的，利用的是牛顿一拉夫逊法和快速解耦法，而配电网络有许多不同于输电网络的特点，如：线路长且分支线多，线径小，使R》X；网络的PQ节点多，PV节点少；多个平衡点等，现有的电网分析方法直接应用到配电网是不合适的。有关配电网的潮流算法的研究是目前的热门研究课题之一。鉴于配电潮流计算在配电网运行与管理系统中的基础地位和作用以及当前缺乏完善，本课题的研究具有重要的理论意义和实用价值。 针对配电网潮流计算的现状进行了全面分析，深入讨论了目前各方法的特点，并从收敛性及其他性能指标进行了比较分析；详细研究了以支路电流为状态量的前推回代法，并以广度优先顺序搜索策略作为理论基础。针对配电网的具体情况，选取10kV的两个配电网子系统进行潮流计算。利用MATLAB6.5进行了基于前推回代法的配电网的潮流计算程序。由计算结果可知，该算法具有一定的优越性。 关键词：配电网 潮流计算 前推回代法 Abstract Distribution network computing flow calculation is an important element of Distribution network analysis. It is important evidence to plan the rational，reliability and finance of the program design of distribution systems and moving motion. Distribution power flow is the readjust of voltage magnitude and optimization of reactive power of distribution systems and operate the basic of simulation and analyzing the changes of net. Nowadays most of the analyzing software of power system is exploited from transportation systems and used Newton—Raphson and FDLE And different distribution systems have different factors，SO it is not flexible to be opened up directly. It is one of the hot issues that the method of power flow of distribution systems. According to lack of the basic and action of operation and management of power flow in distribution systems. Effective method of distribution systems load flow shows the theoretical meaning and real practice. The development of methods for load flow solution of distribution network at present have been fully analyzed and evaluated in the aspect of convergence. A current flow based back/forward sweep algorithm is studied in detail; the breath-first paradigm is as the theoretical basis. According to the specific situation, two sub-networks of distribution network are elected to calculate power flow. MATLAB 6.5 accomplishes the power flow program of distribution network, which based on back/f