wmz-41a型微机保护原理及应用毕业论文

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1、专科生毕业设计（论文）题目：WMZ-41A型微机保护原理及应用学生姓名：系别：电气信息工程系专业年级：指导教师：年月日19摘要微机继电保护指的是以数字式计算机（包括微型机）为基础而构成的继电保护。母线保护是保证电网安全稳定运行的重要系统设备，它的安全性、可靠性、灵敏性和快速性对保证整个区域电网的安全具有决定性的意义。在电网中广泛应用过的母联电流比相式差动保护、电流相位比较式差动保护、比率制动式差动保护，而就适应母线运行方式、故障类型、过渡电阻等方面而言，无疑是按分相电流差动原理构成的比率制动式母差保护效果最佳。WXH-80

2、2由综合距离方向元件和零序方向元件构成全线速动主保护，由三段式相间距离和接地距离以及六段零序电流方向保护构成后备保护；并配有综合重合闸。[关键词]：微机保护电压互感器母差保护19AbstractWhatthemicrocomputerrelayprotectionreferstoistakethedigitalcomputer(includingminiaturemachine)astherelayprotectionwhichthefoundationconstitutes.Thebusprotectionisguara

3、nteedthattheelectricalnetworksafesteadyoperationtheimportantsystemequipment,itssecurity,thereliability,thesensitivityandtherapiditytoguaranteedtheentireregionelectricalnetwork'ssecurityhasthedecisivesignificance.Widelyappliesthemotherintheelectricalnetworktounitet

4、hecurrentratiotypedifferentialmotionprotection,thecurrentphasecomparison-likedifferentialmotionprotection,theratiobraketypedifferentialmotionprotection,butspeakingofadaptationbusbaraspectsandsoonmovementway,breakdowntype,transitionresistance,withoutdoubtismissesth

5、eprotectioneffectaccordingtothephasesplittingelectriccurrentdifferentialmotionprincipleconstitutionratiobraketypemothertobebest.WXH-802constitutestheentirelinebythesynthesisfromthedirectionalelementandzeroforeworddirectionalelementtospeedthemainprotection,isawayfr

6、omandthetouchdowndistanceaswellasbythetriadicinteractionthezeroforeworddirectionofcurrentprotectionconstitutionreserveprotection;Andhasthesynthesistoswitchonagain.Keywords:Themicrocomputerprotection,thevoltagetransformer,themothermissestheprotection19目录前言………………………

7、…………………………………………………………4第一章微机继电保护的特点………………………………………………………5第二章WMZ-41A型母差保护改造…………………………………………………62.1WMZ-41A微机母线保护的特点………………………………………………62.2WMZ-41A微机母差保护的问题及改进方法…………………………………8第三章红托线微机保护改造……………………………………………………93.1红托线微机保护的特点……………………………………………………93.2红托线微机保护的问题及改进方法………………………

8、…………………10第四章110kV、220KV母线电压互感器改造………………………………………13第五章结束语………………………………………………………………………15参考文献………………………………………………………………………………1619前言社会的发展使人们的生活与电的联系更加紧密，电力系统安全可