考虑泵类负荷特性的低压配电网分散无功补偿优化配置.doc

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1、考虑泵类负荷特性的低压配电网分散无功补偿优化配置刘杨华1，张海鹏2，林舜江2，王雅平2（1.广东技术师范学院机电学院，广东广州510665；2.华南理工大学电力学院，广东广州510640）摘要：针对以增氧泵、抽水泵等农业负荷为主的低压配电网台区常出现馈线末端电压过低而导致泵类负荷无法正常启动的问题，提出了考虑泵类负荷特性的低压配电网分散无功补偿优化配置模型。模型中目标函数综合考虑了补偿装置的投资成本和降低台区网损的经济效益，约束条件包括配电台区在泵类负荷正常运行和启动条件下的各种约束。采用sigmoid函数近似逼近目标函数中不连续的符号函数，并采用在离散取值附近曲率较大的非线性罚函

2、数处理无功补偿容量的离散变量特性，进而采用原对偶内点法求解优化模型。通过对某个实际低压配电台区的计算分析，验证了该方法获得的补偿方案能够改善配电台区的电压质量，保证泵类负荷的正常启动，并能有效降低台区的网损。关键词：低压配电网；分散无功补偿配置；泵类负荷特性；符号函数逼近；非线性罚函数DistributedreactivepowercompensationoptimalallocationoflowvoltagedistributionnetworkincludingpumploadscharacteristicsLIUYanghua1,ZHANGHaipeng2,LINShunj

3、iang2,WANGYaping2(1.CollegeofElectromechanicalEngineering,GuangdongPolytechnicNormalUniversity,Guangzhou510665,China;2.SchoolofElectricPowerEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,China)Abstract：Aimedattheproblemthatvoltageattheendoffeederlinesisalwaystoolowtostartuppumplo

4、adsinlow-voltagedistributionnetworkmainlycomposedofagricultureloadsofoxygenpumpsandwaterpumps,adistributedreactivepowercompensationoptimalallocationmodeloflowvoltagedistributionnetworkincludingpumploadscharacteristicsisproposed.Inthismodel,theobjectivefunctionincludesboththeinvestmentcostofthe

5、compensationdeviceandtheeconomicbenefitsofreducingpowerlossofdistributionnetwork,andvariousconstraintsofdistributionnetworkintheconditionofnormaloperationandstartupofpumploadsareincludedintheconstraints.Asigmoidfunctionisusedtoapproximatethediscontinuoussignfunctionintheobjectivefunction,andan

6、onlinearpenaltyfunctionwhichhasrelativelargecurvaturenearthediscretevalueisusedtoaddressthediscretevariablescharacteristicsofreactivepowercompensationcapacity,thentheprimal-dualinterior-pointalgorithmisusedtosolvetheoptimizationmodel.Numericalresultsofareallowvoltagedistributionnetworkshowthat

7、theobtainedoptimalallocationschemeofthemethodcanimprovethevoltagequalityofdistributionnetwork,ensurethenormalstartupofpumploads,anddecreasethepowerlossofdistributionnetworkeffectively.Keywords：lowvoltagedistributionnetwork;distributedre