电力工程课程设计说明书(2)

目录

目录.............................................................................................................................................................................2 《电力工程课程设计》任务书............................................................................................................................4 1电力电量平衡........................................................................................................................................................5 1.1系统有功平衡 ...............................................................................................................................................5 1.1.1 系统用电负荷 .....................................................................................................................................5 1.1.2 系统供电负荷和发电负荷 ...............................................................................................................5 1.1.3 系统备用容量 .....................................................................................................................................6 1.2 无功补偿的设置 ..........................................................................................................................................7 1.2.1 1号变电站的无功补偿 ..................................................................................................................7 1.2.2 2号变电站的无功补偿 ..................................................................................................................7 1.2.3 3号变电站的无功补偿 ..................................................................................................................7 1.2.4 4号变电站的无功补偿 ..................................................................................................................8 2供电方案设计与比较 ..........................................................................................................................................8 2.1 方案的初步设计..........................................................................................................................................8 2.2发电厂和变电站的主接线设计................................................................................................................8 2.2.1主接线设计要求..................................................................................................................................8 2.2.2 发电厂主接线设计 ............................................................................................................................8 2.2.3变电站的主接线设计 .........................................................................................................................9 2.2.4电压等级确定............................................................................................................................................9 2.3导线的选择与校验 ................................................................................................................................... 11 2.3.1方案I................................................................................................................................................... 11 2.3.2方案II.................................................................................................................................................. 13 2.3.3方案III................................................................................................................................................. 14 2.3.4方案IV ................................................................................................................................................ 15 2.3.5方案V ................................................................................................................................................. 16 2.3.6方案VI ................................................................................................................................................ 18 2.4变压器的选择与相关参数的计算 ........................................................................................................ 19 2.4.1 发电厂主变的选择 ......................................................................................................................... 19 2.4.2 四个变电站主变的选择 ................................................................................................................ 20 2.5供电方案的初步比较............................................................................................................................... 21 2.6供电方案的详细比较............................................................................................................................... 22 2.6.1电能损耗 ............................................................................................................................................ 22 2.6.2电压损失校验 ................................................................................................................................... 23 2.5.3一次投资与年运行费 ...................................................................................................................... 24 2.5.4两种方案经济比较 .......................................................................................................................... 25 3潮流计算 ............................................................................................................................................................. 26