毕业设计学生姓名学号学院专业电气工程及其自动化题目配电网三相潮流计算程序设计指导教师摘要：本文首先分析了配电网的特点及对算法的要求，然后建立配电网潮流计算模型。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。针对某地区配电网的具体情况，选取IOKV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，为便于工程人员及时、便捷的得到信息，利用LabVIEW7．0建立可视化界面。由计算结果可知，该算法具有一定的优越性，软件的开发具有一定的实用性。关键词：电力系统，配电网潮流，前推回代法，MATLAB程序设计Abstract：Inthispaper,ungroundedsystem,thecharacteristicsofnon-zerosequencepath,athree-phasedecoupledpowerflowcalculationmethod.Thismethodignorestheinfluenceofzerosequencecomponents,makingthethree-phaseasymmetricalloadcausedbyphasecouplingdecouplingtobeachievedbythephaseflowcalculation.Thealgorithmflowalgorithmtotheexistingdistributionnetworkinthethree-phasenodevoltageequation3n-orderdecompositionofthenodevoltageequationofthreen-order,sonomatterwhatkindofalgorithmcangreatlysavememoryandcomputationforthedistributionnetworktoachievebyphaseanalysisprovidesagoodway.Inthispaper,asystemof36nodestoverifytheresultsshowthatthemethodcanfullyintoaccounttheimpactofunbalancedthree-phaseloads,abettercomputationalspeedandaccuracy.Keywords:powersystems,phasedecoupling,powerflow,back/forwardsweepalgorithm目录1.绪论..........................................................41.1问题的提出..................................................41.2潮流计算问题的发展及配电网潮流计算的现状....................61.3本论文所作的工作............................................72.配电网潮流计算方法............................................82.1配电网特点及对算法的要求....................................82.1.1配电网的特点..............................................82.1.2配电网潮流算法的要求......................................92.2配电网潮流计算数学模型......................................92.2.1电力线路的数学模型........................................92.2.2变压器的等值电路.........................................102.3配电网潮流常用求解算法.....................................122.3.1牛顿法...................................................132.3.2快速解耦法...............................................152.3.3回路阻抗法...............................................172.3.4前推回代法...............................................182.4本章小结...................................................183,中性点不接地系统配网三相解耦潮流.............................193.1电力系统中性点的运行方式...................................193.2数学模型...................................................213.2.1支路模型.................................................213.2.2负荷模型.................................................223.3配电网的相间解耦...........................................223.4算例.......................................................233.5本章小结...................................................25总结...........................................................26参考文献........................................................27致谢...........................................................291.绪论1.1问题的提出自从以电力广泛应用为代表的第二次工业革命以来...
