10千伏变电站无功补偿优化设计

题目：10千伏配电网无功补偿优化设计学生姓名指导教师所在学院专业年级摘要随着配电网用户容量的增加，合理配置无功功率的要求也随之增高。配电网中无功配置的合理与否将直接影响着配电网运行的安全性、经济性和电能质量合格率。因此，配电网无功配置优化是保证配电网安全、经济运行的有效手段之一，研究配电网的无功配置优化是提高配电网无功管理水平的重要方面，具有重要的理论价值与现实意义。配电网无功配置优化是一个多目标、多约束的混合非线性规划问题，其操作变量既有连续变量又有离散变量，求解过程十分复杂。本设计结合配电网自身的结构特点，在优化过程中，确定了潮流算法，即QP潮流算法，来求解线损和约束校验。建立了以有功损耗和投资之和最小化为目标的无功优化配置模型，用蚁群算法求解出无功最佳补偿点。关键词：无功优化配电网潮流算法蚁群算法ABSTRACTAlongwiththeincreaseoftheconsumercapacityofdistributionnetwork,therequirementofrationalallocationofreactivepowerisalsoincreasingly.Thereasonablenessofthereactivepowerconfigurationwilldirectlaffectthesecurity,economyandthepassingrateofpowerqualityofdistributionpowernetworkoperation.Soitis,reactivepowerassignmentoptimizationisoneoftheeffectivemeanswhichtoensurethesecurity,economyoperationoftheredialdistributionsystem.Toresearchreactivepowerallocationindistributionnetworkistheimportantpartforimprovethemanagementofreactivepowerandhastheall-importanttheoreticalvalueandpracticalsignificance.Optimalconfigurationofreactivepowerisamulti-objective,multi-constrainedmixednonlinearprogrammingproblem.Thevariableisnotonlycontinuousbutalsodiscreteandthesolutionprocessisverycomplicated.Inthispaper,thestructuralcharacteristicsofnetworkitselfdeterminethepowerflowalgorithm-PQflowalgorithm,tosolvethelinelossandconstraintchecking,andestablishthereactivepoweroptimizationmodelwhichcombinedinvestmentandactivepowerlossminimizationwiththeantcolonyalgorithmfortheoptimalcompensationlocation.Keywords:DistributionnetworkReactivepoweroptimizationAntcolonyalgorithmPowerflowcalculation目录0引言..............................................................................................................................................1110千伏配电网无功补偿优化的背景.........................................................................................21.110千伏配电网无功补偿优化的目的和意义...................................................................21.2我国配电网现状................................................................................................................21.3配电系统无功补偿方式和无功优化的算法....................................................................41.3.1配电系统无功补偿方式..........................................................................................41.3.2配电网无功优化的研究方法..................................................................................41.3.3配电网无功优化算法研究现状.............................................................................61.4无功功率平衡以及无功的影响........................................................................................71.4.1无功功率平衡..........................................................................................................71.4.2无功对电压和线损的影响......................................................................................81.5本文所做的工作和研究内容............................................................................................92配电网潮流算法的研究...........................................................................................................102.1潮流计算方法的研究现状..............................................................................................102.2配电网潮流计算的特点..................................................................................................112.3QP算法的计算原理.....................................................................................................122.3.1牛顿-拉夫逊潮流计算的基本原理.......................................................................122.3.2节点电压用极坐标表示时的牛顿-拉夫逊潮流计算...........................................152.3.3QP分解法的原理和过程...................................................................................182.4石河子老街区10千伏配电网潮流计算........................................................................202.4.1石河子市用电概况...............................................................................................202.4.2石河子配电网存在的问题...................................................................................222.4.3石河子老街区配电网无功优化...........................................................................232.5本章小结..........................................................................................................................243配电网无功优化模型................................................................................................................253.1配电网数学模型及约束条件..........................................................................................253.1.1目标函数................................................................................................................253.1.2约束条件................................................................................................................263.2优化的执行过程..............................................................................................................273.3本章小结..........................................................................................................................274用蚁群优化算法求解无功配置优化........................................................................................284.1蚁群算法的概念和基本原理...............................................................