低压电容器补偿柜设计

本科毕业设计（自然科学）题目：低压电容器补偿柜设计院（系、部）：机电工程学院学生姓名：指导教师：职称年月日河北科技师范学院教务处制HebeiNormalUniversityofScience&Technology专业：电气工程及其自动化学号：摘要I摘要电网中的电力负荷如电动机、变压器等，大部分属于感性负荷，在运行过程中需向这些设备提供相应的无功功率。在电网中安装并联电容器等无功补偿设备以后，可以提供感性负载所消耗的无功功率，减少了电网电源向感性负荷提供、由线路输送的无功功率，由于减少了无功功率在电网中的流动，因此可以降低线路和变压器因输送无功功率造成的电能损耗，这就是无功补偿。无功补偿是保持店里系统无功功率平衡、降低损耗、提高供电质量的一种重要手段。无功功率补偿装置是电力供电系统中不可缺少的、非常重要的组成部分。合理的选择补偿装置，可以做到最大限度的减少电网的损耗，提高电网的供电质量。本设计选用了NWK1-G型无功功率自动补偿进行无功功率的补偿，可使功率因数提高减小主变压器的容量及补偿点以前供电系统中各原件上的功率损耗。关键词：无功功率；无功补偿装置；原理；NWK1-GAbstractInthegridpowerloadsuchaselectricmotors,transformers,mostbelongtotheperceptualload,duringoperationoftheneedtoprovidethecorrespondingtotheequipmentofreactivepower.Inthepowerofinstallationparallelcapacitorandreactivecompensationequipmentafter,canprovidetheperceptualloadconsumptioninthereactivepower,reducethepowergridtoperceptualloadbylinesofconveyingprovide,reactivepower,becausethereductioninthegridpowerinreactivepowerflow,socanreducethelinesandtransformerforconveyingreactivepowercausedbyelectricpower,thisisthereactivepowercompensation.Thereactivepowercompensationistokeepthestoresystemreactivepowerbalance,reducelosstothequalityofpowersupply,oneimportantmethod.Reactivepowercompensationdeviceiselectricpowersupplysystemofindispensable,veryimportantpart.Thechoiceofreasonablecompensationdevice,candominimizelossesinthepowergrid,andimprovethequalityofpowersupplyofpowergrid.ThisdesignchoosetheNWK1-Gtypeofreactivepowercompensationforautomaticreactivepowercompensation,canmakethepowerfactorimprovementreducethecapacityofthemaintransformerandpowersupplysystemofcompensatorypointbeforethepowerlossofontheoriginal.Keywords:reactivepower；reactivepowercompensationdevice；theory；NWK1-G目录II目录摘要.....................................................................IAbstract..................................................................I1绪论....................................................................11.1论文研究背景与意义................................................................................................11.2补偿柜的工作原理....................................................................................................21.3一般无功补偿装置的设计要求................................................................................22低压电容器补偿柜的总体设计过程..........................................32.1原理图.........................................................................................................................32.1.1原理图接线方法............................................................................................42.2一次接线图................................................................................................................42.3二次接线图...........................................................................................................42.4手动控制部分说明..................................................................................................42.5电流互感器的使用.....................................................................................................52.5.1电流互感器的工作原理.................................................................................52.5.2电流互感器的作用........................................................................................52.5.3电流互感器的使用.........................................................................................62.6功率因数表的使用.....................................................................................................72.6.1功率因数表的原理........................................................................................72.6.2功率因数表的正确接法.................................................................................72.7控制器NWK1-G的介绍..............................................................................................82.7.1NWK1-G低压控制器概述...............................................................................82.7.2NWK1-G低压控制器的特点...........................................................................82.8主要参数的计算.........................................................................................................92.9制定电气元件目录表.................................................................................................93补偿柜的控制面板图.....................................................104电容器连接方式为出发点的补偿装置分类...................................105补偿电容器的维护.......................................................116电容器的常见故障处理...................................................127补偿容量的选择.........................................................128结论...................................................................13目录III9参考文献...............................................................1410致谢..................................................................1511附录..................................................................15河北科技师范学院2012届本科毕业设计11绪论1.1论文研究背景与意义无功补偿装置在50多年的发展历史中经历了从简单到复杂，手动到自动的发展过程。电力系统并联补偿装置可以按照不同的标准进行分类.从静态到动态，从单一的无功控制到无功电压综合控制。国外情况静止无功补偿装置(StaticCompensator)或者SVC-静止无功系统是相对于调相机而言的一种利用电容器和各种类型的电抗器进行无功补偿(可提供可变动的容性或感性无功)的装置,简称静补装置(静补)或静止补偿器。1967年,第一批静补装置在英国制成以后,受到世界各国的广泛重视,西德、美国、