某冶金机械修造厂总降压变电所及高压配电系统设计(同名15640)

某冶金机械修造厂总降压变电所及高压配电系统设计(同名15640)severalgroupnumber,thenwithb±a,=c,cisismethylbtwoverticalboxbetweenofaccuratesize.Per-2~3measurement,suchasproceedsofcvaluesareequalandequaltothedesignvalue,thentheverticalinstallationaccurate.Forexamplea,b,andcvalueswhileonhorizontalverticalerrorsformeasurement,Generalinironanglecodebitatmeasurementlevelpointsgriderrors,specificmethodisfrombaselinetomethylverticalboxcenterlinedistancefora,,tobverticalboxdistanceforb,listcanmeasured0河南工业职业技术学院HenanPolytechnicInstitute毕业设计论文题目：某冶金机械修造厂总降压变电所及高压配电系统设计专业：电气自动化技术班级：电气1001班姓名：张志海学号：0401100136指导教师：张季萌severalgroupnumber,thenwithb±a,=c,cisismethylbtwoverticalboxbetweenofaccuratesize.Per-2~3measurement,suchasproceedsofcvaluesareequalandequaltothedesignvalue,thentheverticalinstallationaccurate.Forexamplea,b,andcvalueswhileonhorizontalverticalerrorsformeasurement,Generalinironanglecodebitatmeasurementlevelpointsgriderrors,specificmethodisfrombaselinetomethylverticalboxcenterlinedistancefora,,tobverticalboxdistanceforb,listcanmeasured1摘要随着我国国民经济的飞速发展，工业对电力的需求也越来越迫切。随着中国工业规模的不断扩大，对电力供应的安全性、可靠性提出了更高的要求，因此电力系统与用户直接关联的供电系统尤为重要。作为供电系统的主要组成部分，电气设备的质量及其性能的先进性是决定供电系统安全可靠运行的前提条件之一。本设计根据该冶金机械厂的相关资料和实际情况，对该厂的总降压变电所和高压供电系统进行设计。本设计首先根据工厂提供的资料对工厂的负荷情况进行了计算，根据负荷情况对变压器的容量和台数进行了选择。该厂电源由某变电所以35kV双回路架空线引出，本设计选择在该厂设立总降压变电所先将电压降为厂区供电电压10kV，在由各车间变电所降为负荷所需电压。为保证供电系统的可靠性，总降压变电所采用单母线分段式接线方式，厂区供电系统采用放射式接线方式。通过计算，本设计对各变电所的主要电气设备、电缆和母线进行了选择和校验，对一次侧主要设备进行了继电保护整定，对避雷和接地装置进行了选择。关键词：变电所；供电系统；电气设备severalgroupnumber,thenwithb±a,=c,cisismethylbtwoverticalboxbetweenofaccuratesize.Per-2~3measurement,suchasproceedsofcvaluesareequalandequaltothedesignvalue,thentheverticalinstallationaccurate.Forexamplea,b,andcvalueswhileonhorizontalverticalerrorsformeasurement,Generalinironanglecodebitatmeasurementlevelpointsgriderrors,specificmethodisfrombaselinetomethylverticalboxcenterlinedistancefora,,tobverticalboxdistanceforb,listcanmeasured2目次1绪论.....................................................................01.1工厂供电的意义及要求....................................................01.2工厂供电设计的一般原则..................................................21.3设计的具体内容..........................................................31.4工厂原始资料...........................................................42工厂的电力负荷及其计算...................................................62.1工厂的电力负荷.........................................................62.2车间计算负荷的确定.....................................................72.3工厂计算负荷的确定.....................................................82.4无功功率补偿及其计算..................................................133降压变电所及变压器的选择................................................163.1总降压变电所所址的选择................................................163.2降压变电所形式的选择..................................................173.3厂区供电电压的选择....................................................183.4总降压变电所变压器台数和容量的选择....................................203.5车间变电所变压器选择..................................................204总降压变电所主接线方案及供电线路的设计..................................234.1总降压变电所的任务和类型..............................................234.2变电所主接线方案的设计原则与要求......................................244.3主接线方案的选择......................................................274.4厂区配电线路的设计....................................................284.5总降压变电所二次回路操作电源设计......................................285短路电流计算............................................................315.1短路电流计算的目的....................................................31severalgroupnumber,thenwithb±a,=c,cisismethylbtwoverticalboxbetweenofaccuratesize.Per-2~3measurement,suchasproceedsofcvaluesareequalandequaltothedesignvalue,thentheverticalinstallationaccurate.Forexamplea,b,andcvalueswhileonhorizontalverticalerrorsformeasurement,Generalinironanglecodebitatmeasurementlevelpointsgriderrors,specificmethodisfrombaselinetomethylverticalboxcenterlinedistancefora,,tobverticalboxdistanceforb,listcanmeasured35.2短路电流计算的方法和步骤..............................................325.3该厂供电系统电路及短路等效电路........................................345.4短路计算..............................................................355.5短路计算结果..........................................................436一次设备的选择与校验....................................................446.1一次设备的选择校验的条件与项目........................................446.2一次设备效验公式......................................................466.3一次设备的选择与校验..................................................476.4电缆、母线的选择......................................................517继电保护装置的整定计算..................................................567.1总降压变电所35/10kV变压器的保护......................................577.235kV电力线路保护.....................................................617.310kV电力线路保护.....................................................638防雷保护与接地装置的设计................................................658.1变电所防雷保护与防雷装置的选择........................................658.2接地装置的设计计算....................................................66结论.....................................................................