24工厂供电课程设计

《工厂供电》课程设计设计题目：某电机制造厂总降压变电所主接线设计学号：姓名：专业：电气工程及其自动化班级：10级（1）班目录摘要··········································································41.设计题目····································································51.1某电机制造厂总降压变电所及高压配电系统设计····························52.原始资料···································································52.1设计依据······························································52.2总变电所设计··························································73.负荷计算····································································73.1变电所的负荷计算······················································74.系统主接线方案的选择·······················································114.1方案1：单回路高压线路—变压器组、低压单母线分段主接线···············114.2方案2：双回路高压线路—变压器组、低压单母线分段主接线···············114.3方案的比较于选择·····················································115.短路电流计算······························································115.1短路计算····························································115.2最大运行方式下的短路点计算··········································125.3最小运行方式下的短路点计算··········································136.高压电气设备的选择························································146.135kV架空线的选择···················································146.210kV母线的选择·····················································156.3高压隔离开关的选择··················································166.4电流互感器的选择····················································176.5电压互感器的选择····················································18总结·········································································20参考文献····································································21附录1：方案1主接线方案图····················································22附录2：工厂总平面布置图·····················································22摘要为使工厂供电工作很好地为工业生产服务，切实保证工厂生产和生活用电的需要，并做好节能工作，本设计在大量收集资料，并对原始资料进行分析后，做出35kV变电所及变电系统电气部分的选择和设计，使其达到以下基本要求：1、安全在电能的供应、分配和使用中，不发生人身事故和设备事故。2、可靠满足电能用户对供电可靠性的要求。3、优质满足电能用户对电压和频率等质量的要求4、经济供电系统的投资少，运行费用低，并尽可能地节约电能和减少有色金属的消耗量。此外，在供电工作中，又合理地处理局部和全局、当前和长远等关系，既照顾局部的当前的利益，又要有全局观点，顾全大局，适应发展。按照国家标准GB50052-95《供配电系统设计规范》、GB50059-92《35~110kV变电所设计规范》、GB50054-95《低压配电设计规范》等的规定，工厂供电设计遵循以下原则：1、遵守规程、执行政策；遵守国家的有关规定及标准，执行国家的有关方针政策，包括节约能源，节约有色金属等技术经济政策。2、安全可靠、先进合理；做到保障人身和设备的安全，供电可靠，电能质量合格，技术先进和经济合理，采用效率高、能耗低和性能先进电气产品。3、近期为主、考虑发展；根据工作特点、规模和发展规划，正确处理近期建设与远期发展的关系，做到远近结合，适当考虑扩建的可能性。4、全局出发、统筹兼顾。按负荷性质、用电容量、工程特点和地区供电条件等，合理确定设计方案。工厂供电设计是整个工厂设计中的重要组成部分。工厂供电设计的质量直接影响到工厂的生产及发展。关键词：节能配电安全合理发展1．设计题目1.1某电机制造厂总降压变电所及高压配电系统设计2．原始资料2.1设计依据2.1.1全厂各车间负荷情况汇总表。表2-1车间名称Pe/kWKdcosφ电机修理车间23000.60.7机械加工车间8800.650.65新品试制车间6500.550.6原料车间5500.350.65备件车间5600.50.7锻造车间1800.60.65锅炉房2600.90.8空压房3020.80.65汽车库560.50.7线圈车间3280.550.65半成品试验车间7500.650.75成品试验车间25640.350.6加压站（10KV转供负荷）2740.550.65设备处仓库（10KV转供负荷）6540.550.75成品试验站内大型集中负荷38740.650.752.1.2供用电协议。1）当地供电部门可提供两种电源：①从某220/35KV区域变电站提供电源，该站距离厂南5公里；②从某35/10KV变电所，提供10KV备用电源，该所距离厂南5公里。2）配电系统技术数据。（1）区域变电站35KV母线短路数据为：表2-2运行方式电源35千伏母线短容量说明系统最大运行方式时S（3）dmax=580兆伏安系统最小运行方式时S（3）dmin=265兆伏安（2）配电系统kVkVkVkVtops图2-13）供电部门对工厂提出的技术要求：①区域变电站35KV馈电线路定时限过流保护装置的整定时间为1.8秒，要求厂总降压变电所的保护动作时间不大于1.3秒。②工厂在总降压变电所35KV侧计量。③功率因素值应在0.9以上。2.1.3工厂的负荷性质①本工厂大部分车间为一班制，少数车间为两班或三班制，年最大负荷利用小时数为2500小时。②锅炉房提供高压蒸汽，停电会使锅炉发生危险。由于距离市区较远，消防用水需要厂方自备。因此，锅炉房要求较高的可靠性。2.1.4工厂的自然条件（1）年最高气温为40℃，年最低气温5℃，年平均气温为10℃。（2）站所选地址地质以粘土为主，地下水位3-5米。（3）风向以东南风为主。2.2总变电所设计1）主结线设计：根据设计任务书，分析原始资料与数据，列出技术上可能实现的多个方案，经过概略分析比较，留下2-3个较优方案进行详细计算和分析比较（经济计算分析时，设备价格、使用综合投资指标），确定最优方案。2）短路电流计算：根据电气设备选择和继电保护的需要，确定短路计算点，计算三相短路电流，计算结果列出汇总表。3）主要电气设备选择：主要电气设备的选择，包括断路器、隔离开关、互感器、导线截面和型号、绝缘子等设备的选择及效验。选用设备型号、数量、汇总设备一览表。4）主要设备继电保护设计：包括主变压器、线路等元件的保护方式选择和整定计算。5）配电装置设计：包括配电装置形式的选择、设备布置图。6）防雷、接地设计：包括直击雷保护、进行波保护和接地网设计。3.负荷计算3.1变电所的负荷计算3.1.1用电设备的负荷计算根据设计任务书的要求，按照需要系数法及以下计算公式KdPePj21/COSPjQj22QjPjSjUeSjIj3/得各项数据列表如下（下表数据均为35kV侧）：表3-1用电设备Pe/kWKdCosφ计算负荷Pj/kWQj/kVASj/kVAIj/A电机修理车间23000.60.713801407.61971.2332.52机械加工车间8800.650.65572669.24880.3814.52新品试制车间6500.550.6357.5475.48594.889.83原料车间5500.350.65192.5225.23296.284.89备件车间5600.50.7280285.6399.966.6锻造车间1800.60.65108126.36166.232.74锅炉房2600.90.8234175.5292.54.83空压房3020.80.65241.6282.67371.856.13汽车库560.50.72828.56400.66线圈车间3280.550.65180.4211.07277.664.58半成品试验车间7500.650.75487.5429649.3810.72成品试验车间25640.350.6897.41193.541493.2724.67加压站（10KV转供负荷）2740.550.65150.7176.32231.953.82设备处仓库（10KV转供负荷）6540.550.75359.7316.54479.157.91成品试验站内大型集中负荷38740.650.750.882518.12215.933357.2055.39合计7987.48218.6411501.92189.81有功负荷同时系数取95.0kP无功负荷同时系数取97.0kq7588.037927.0810527.37173.663.1.2变压器损耗估算ΔPb=1%Sj=0.01×10527.37=105.27kwΔQb=5%Sj=0.05×10527.37=526.37kvar3.1.3无功功率补偿计算从设计任务书的要求可知，工厂35kV高压侧进线在最大负荷时，其功率因素不应小于0.9，考虑到变压器的无功功率损耗ΔQb，远远大于有功功率损耗ΔPb，因此，在变压器的10kV侧进行无功功率补偿时，其补偿后的功率因素应稍大于0.9，现设cosφ=0.95，则10kV侧在补偿前的功率因素为:Pj/Sj1cos37.10527/03.758872.0因此，所需要的补偿容量为：)21(tgtgPjQc)95.0arccos72.0arccos(03.7588tgtgvar4818k选取var5000kQc35kV侧在补偿后的负荷及功率因素计算：kWPbPjPjg30.769327.10503.7588var45.3453500037.52608.7927kQcQbQjQjgKvaQjgPjgSjg842545.34533.76932222Pjg/Sjg2cos8425/30.7693913.0913.0cos满足了设计任务书的要求，其计算数据如下：项目