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中北大学2012届毕业设计说明书目录1引言...............................................................12确定火电厂和水电厂发电机型号、参数及主变压器容量选择...............22.1确定火电厂和水电厂的发电机型号、参数.............................22.2主变压器容量选择.................................................32.2.1确定变压器容量、台数的原则.....................................32.3发电厂主变压器容量的选择.........................................32.3.1火电厂主变压器容量的选择.......................................32.3.2水电厂主变压器容量的选择.......................................43对电网接线方式的选择及架空线路型号选择.............................63.1地区电网接线方案1的计算（辐射网）...............................73.1.1地区电网接线方案1的功率平衡计算...............................73.1.2地区电网接线方案1的架空线路导线型号初选......................103.1.3地区电网接线方案1的导线截面积校验............................123.1.4地区电网接线方案1的潮流计算..................................143.1.5地区电网接线方案1的总投资和年运行费用........................183.2地区电网接线方案2的功率平衡计算................................213.2.1地区电网接线方案2的功率平衡计算..............................213.2.2地区电网接线方案2的架空线路导线型号初选......................223.2.3地区电网接线方案2的导线截面积校验............................233.2.4地区电网接线方案2的潮流计算..................................243.2.5地区电网接线方案2的总投资和年运行费..........................284通过技术经济比较确定最佳方案......................................305优选方案短路电流计算..............................................315.1各元件电抗标幺值的计算..........................................315.2K1点（110KV母线）短路电流计算...................................345.3K2（35KV母线）短路电流计算......................................385.4K3（10KV母线）短路电流计算......................................42第I页共II页中北大学2012届毕业设计说明书5.5K4点短路时的短路电流计算........................................446火电厂电气设备的选择..............................................476.1断路器与隔离开关的选择..........................................476.1.1110KV断路器与隔离开关的选择..................................476.1.235KV断路器与隔离开关的选择...................................476.1.310KV断路器与隔离开关的选择...................................486.2电压互感器的选择................................................496.3电流互感器的选择................................................496.3.1110KV电流互感器..............................................506.3.235KV侧电流互感器.............................................506.3.310KV侧电流互感器.............................................506.410KV出线电抗器的选择...........................................516.4.1检验断路器开断能力............................................516.4.2校验动稳定性能................................................516.4.3校验热稳定性能................................................527继电保护配置......................................................537.1发电机保护（型号：NSP—711）....................................547.2变压器组保护（型号：PST—1260系列）............................557.3110KV线路保护（型号：ISA—311系列）............................55总结.............................................................56参考文献..................................