工厂供电系统的继电保护.docx

工厂供电系统的继电保护.docx

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工厂供电系统的继电保护

工厂供电系统的继电保护

河北农业大学现代科技学院

本科毕业论文（设计）

题目:

工厂供电系统的继电保护学部:

工学部专业班级:

电气工程及其自动化0803班学号:

2008614531310学生姓名:

张腾指导教师姓名:

曾立华指导教师职称:

讲师

二O一二年五月二十五日

工厂供电系统的继电保护

摘要:

随着电力工业的发展，工厂中的电力设备对继电保护与自动化装置提出了更高的要求。

工厂用电系统运行正常与否，将直接影响到生产的安全运行，因此，对工厂用电进行合理地继电保护配置，有着重大的意义。

本文内容包括继电保护的基本知识，工厂10kv供电线路的继电保护、电力变压器的保护、其他电力设备的继电保护、自动重合闸及备用电源自动投入装置、配电系统的微机保护。

着重对各项继电保护的原理和工作方式进行了研究。

对工厂实际问题进行了保护整定，以选择出适合的电气设备和线路，保证工厂能正常的进行生产工作。

关键词:

工厂供电系统;继电保护;微机保护

Thefactorypowersupplysystemforrelayprotection

Abstract:

withthedevelopmentofpowerindustry,powerequipmentfactoryintherelayprotectionandautomationdevicehasputforwardgherrequirements.Thefactoryuseselectricitythesystemoperatinghi

normallyornot,willdirectlyaffectthesafety,therefore,thefactoryuseselectricreasonableconfigurationforrelayprotection,isofgreatsignificance.Thecontentofthisarticleincludesthebasicknowledgeofplantprotection,10kVpowerlinerelayprotection,theprotectionofpowertransformersandotherelectricalequipment,relayprotection,automaticreclosureandstandbypowerautomaticinputdeviceofmicrocomputerprotection,distributionsystem.Focusingontherelayprotectionprinciplesandworkingmethodsofthestudy.Onthepracticalproblemsofprotectionsetting,inordertochooseasuitableelectricalequipmentandwiring,toensurenormalproductionwork.

Keywords:

electricpowersystem;relayprotection;microcomputerprotection

2

引言......................................................................................................................................................................1

第一章继电保护基本知识................................................................................................................................1

1.1继电保护的任务....................................................................................................................................1

1.2继电保护的基本原理...........................................................................................................................1第二章供电线路的继电保护............................................................................................................................2

2.1电力线路的常见故障............................................................................................................................2

2.2电流保护的接线方式和接线系数.......................................................................................................2

2.3过电流保护............................................................................................................................................3

2.3.1接线和工作原理.........................................................................................................................3

2.3.2保护整定.....................................................................................................................................4

2.4电流速断保护........................................................................................................................................6

2.4.1电流速断保护的特点.................................................................................................................6

2.4.2电流速断保护的接线和工作原理.............................................................................................6

2.4.3电流速断保护的整定.................................................................................................................7

2.5过负荷保护............................................................................................................................................8

2.5.1接线和工作原理.........................................................................................................................9

2.5.2保护整定.....................................................................................................................................9

2.6单相接地保护........................................................................................................................................9

2.6.1单相接地保护接线...................................................................................................................10

2.6.2保护整定...................................................................................................................................10

第三章电力变压器的继电保护.......................................................................................................................11

3.1电力变压器的常见故障和保护配置...................................................................................................11

3.1.1常见故障....................................................................................................................................11

3.1.2保护配置....................................................................................................................................11

3.2变压器电流保护的接线方式.........................................................