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《针对低压电网设计的无功补偿智能控制器》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊安徽工业大学毕业设计(论文)说明书摘要电网向用电设备提供的负载电流由有功电流和无功电流两部分组成,无功电流在电网和负载之间往复交换,大大占用电网供电容量,使供电设备的供电能力大大下降。动态无功功率补偿装置的基本原理就是用装置产生的容性无功电流实时、快速、准确地抵消电网中的感性无功电流,从而提高了功率因数,保证了用电质量,提高了供电设备的供电能力,并减小了电路中的损耗。因此无功功率补偿在电力系统中是一项重要的工作,根据企业的自
2、身实际需要通过自动投切电容器来达到无功补偿的效果,以此达到保证功率因数质量的目的。本次设计原理是以功率因数和电压为考虑对象综合决策制定投切电容器,并通过控制单元检测电压,电流,计算功率因数和无功功率,然后与电压,无功功率上下极值相比较,最后作出控制决策(投入或切除电容)。本次设计针对360KVAR配电系统提出的无功补偿需要而设计的一套无功补偿智能控制系统,而且结合接触器投切准则。同时,由于无功量增加会导致电压的抬高,因此本文采取电压,无功补偿量的综合考虑控制方式来进行电网的无功补偿。关键词:无功功率,
3、无功补偿,控制器,接触器,功率因数共43页第43页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊安徽工业大学毕业设计(论文)说明书AbstcactPowergridtoelectricalequipmentbytheloadcurrentprovidemeritoriouselectriccurrentandreactivecurrenttwoparts,reactivecurrentbetweengridandloadinreciprocatingexchange,g
4、reatlyoccupiesgridpowersupplycapacitytomakepowerequipmentpowersupplydramaticallyreduced.Dynamicreactivepowercompensationdevicewiththebasicprincipleisthedeiceproducingcapacitivereactivecurrentreal-time,quicklyandaccuratelyoffsettheperceptualreactivecurre
5、ntpower,therebyimprovingpowerfactor,andtoensurethequalityofpowersupplyequipment,improvedthepowersupply,andreducethelossofacircuit.Soreactivepowercompensationinpowersystemisanimportantwork,accordingtotheenterpriseitselfactualneedthroughauto-switchingcapa
6、citortoachievetheeffectofreactivepowercompensation,toensurethequalityofpowerfactorofpurpose.Thedesignprincipleistoconsiderthevoltageofpowerfactorandcomprehensivedecision-makingobject,andthroughcastcutcapacitorcontrolunittestingvoltage,current,computatio
7、nalpowerfactorandreactivepower,then,reactivepowerandvoltagefluctuationextremum,comparedtocontroldecision-making(lastinvestedorresectioncapacitors).360KVARdistributionsystemforthedesignofreactivepowercompensationneedtoputforwardasetofdesignedreactivepowe
8、rcompensation,andintelligentcontrolsystemwithcontactorthrewcuttingcriteria.Atthesametime,becauseofreactivepowerwillleadtoincreasedraised,sothispapervoltageandreactivepowercompensationtakenvoltageconsideringcontroltheamountofwayst