发电厂电气部分课程设计 (2)

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1、目录设计任务书（置于目录前）·········································1摘要·······························································3引言·······························································41系统与负荷资料分析·············································52电气主接线···········

2、··········································62.1主接线方案的选择···············································62.2主变压器的选择与计算···········································92.3厂用电接线方式的选择···········································112.4主接线中设备配置的的一般规则···························

3、·······133短路电流的计算··········································143.1短路计算的一般规则·············································143.2短路电流的计算·················································153.3短路电流计算表·················································164电气设备的选择···········

4、································174.1电气设备选择的一般规则·········································174.2电气选择的条件·················································17174.3电气设备的选择·················································204.4电气设备选择的结果表·································

5、··········225*配电装置················································235.1配电装置选择的一般原则·········································235.2配电装置的选择及依据···········································25结束语····················································26参考文献·················

6、·································27附录Ⅰ：短路计算··········································28附录Ⅱ：电气设备的校验····································33附录3：设计总图··········································391、系统与负荷资料分析根据原始资料，本电厂是中型发电厂，比较靠近负荷中心。本电厂要向本地区的各工厂企业供电，还要与220KV系统相连，并担负着向市

7、区供电，保障市区人民生产和生活用电的责任。由于本厂的地理位置优越，一般情况下都容易获得燃料，能确保本地区以及附近的工厂、市区的正常供电，还可以向220KV提供电能。由资料我们可知，本电厂以110KV的电压等级向用户送电。这里有两电压等级，分别是110KV，有8回出线；220KV，有10回出线，全部负荷有Ⅰ、Ⅱ、Ⅲ级负荷。1.1220KV电压等级架空线10回，I级负荷，最大输送200MW，TMAX=6000h/a；cos=0.85。出线回路数大于4回且为I级负荷，应采用双母带旁路或一台半。1.2110KV电压等级架空线

8、8回，Ⅰ级负荷，最大输送180MW，TMAX=6000h/a；cos=0.85。出线回路数大于4回且为I级负荷，为使其出线断路器检修时不停电，应采用双母分段或双母带旁路，以保证其供电的可靠性和灵活性。17总装机容量16000MW，短路容量10000MW。根据原始资料，本电厂是中型发电厂，其容量为2×200MW，占电力系统总容量（800/1600