继电保护毕业论文

35KV主变压器保护11摘要继电保护是电力系统设计有关事故时减小停电范围、限制事故对设备损害的这样一个领域。电力系统继电保护的设计与配置是否合理，直接影响电力系统的安全运行，故选择保护方式时，满足继电保护的基本要求。选择保护方式和正确的整定计算，以保证电力系统的安全运行。本文主要通过分析原始资料中主要设备的参数，首先，需要对电力系统继电保护原理进行全面系统的复习、查阅相关资料，加深理解；其次，结合相关参数和各种继电保护原理，确定适用于变压器的保护方案，最后，分别对变压器的进行各种保护整定和配置计算，并且根据系统一次设计图给出部分二次设计及其配置图和一般原理图。本次设计中主要采用的保护有瓦斯保护、变压器纵联差动保护、低电压起动的过电流保护、过负荷保护、温度保护。关键词继电保护，变压器保护，灵敏度校验，短路电流计算，整定计算AbstractTheRelayprotectioniselectricalsystemdesignrelevantaccidentreduceoutagescope,limitthedamageofequipmentaccidentssuchafield.Powersystemprotectiondesignandconfigurationwhetherreasonable,directlyaffectingthesafeoperationofthepowersystem,sochooseprotectionway,meetthebasicrequirementsoftherelayprotection.Choosetherightprotectionmodeandsettingcalculation,toensurethesafeoperationofthepowersystem.Thispapermainlythroughtheanalysisoftheoriginalmaterialofmainequipmentofparameters,firstofall,needfortransformerprotectionprincipleofcomprehensivesystemreview,refertotherelevantmaterial,deepenunderstanding;Secondly,inconjunctionwiththerelevantparametersandallkindsofrelayprotectionprinciple,determinesuitablefortransformerprotectionscheme,thenrespectively,thetransformerprotectionsettingandconfigurationofcalculatedaccordingtothesystem,andgivessomesecondarydesigndrawingsonceitsconfigurationdiagramandgeneralprinciplediagram.Thisdesignmainlyadoptsatransformerprotectionofgasprotection,longitudinalleaguedifferentialprotection,overcurrentprotection,overloadprotection,temperatureprotection.KeyWordsrelayprotection，transformerprotection，sensitivitycheck，short-circuitcurrentcalculation，settingcalculation35KV主变压器保护11目录摘要..................................................................................................................................................1Abstract..........................................................................................................................................1绪言..................................................................................................................................................11.1课题背景...........................................................................................................................11.2课题研究的目的和意义...................................................................................................12系统设计方案研究.......................................................................................................................22.1变电所主变压器基本情况介绍........................................................................................22.2系统运行方式分析............................................................................................................32.2.1系统运行方式分析原则.........................................................................................32.2.2煤矿变电所各种电气运行方式的分析.................................................................42.3变压器各种保护及其装设条件.......................................................................................52.3.1瓦斯保护.................................................................................................................52.3.2纵差动保护............................................................................................................52.3.3过电流保护...........................................................................................................82.3.4过负荷保护.............................................................................................................82.3.5温度保护.................................................................................................................92.2继电保护规程中对相关保护的配置要求................................................................92.4针对本设计的规程要求..................................................................................................102.4.1同时性故障的配置方案......................................................................................102.4.2对经电流互感器接入保护的要求......................................................................102.4.3关于远后备保护的规定......................................................................................112.4.4系统振荡对保护的要求......................................................................................112.4.5其他相关规定......................................................................................................113短路电流的计算.........................................................................................................................123.1标幺值归算......................................................................................................................123.2短路电流的计算..............................................................................................................144保护的整定计算及灵敏度检验.................................................................................................284.1变压器主保护的整定计算及灵敏度检验.....................................................................284.1.1纵连差动保护的整定计算...................................................................................284.1.2差动保护的灵敏度校验..................................................................