中国矿业大学成人教育学院2010届毕业设计.docVIP

摘　　　　要 煤矿井下工作环境复杂，矿井的井下供电系统要保证煤矿能够安全供电，维持矿井生产正常运行，减少事故的发生。木文根据童亭矿的特点及生产现状，做出了井下安全供电系统设计。根据开采方法、巷道布置以及选用的机械设备，拟定井下供电系统，确定井下变电所配电点的位置；根据负荷计算选择变压器；选择电缆的长度、型号及芯线截而并进行了校验；选择高低压开关设备、通过计算短路电流整定保护装置，确定了井下保护接地系统；进行了变电所硐室及设备布置，并作出井下供电的经济计算。 本设计为童亭煤矿S1095综采工作面供电设计。从实际出发进行系统分析，除满足一般设计规程及规范要求外，还要满足《煤矿安全规程》的具体要求和标准。通过短路电流、开关继电保护整定的计算和保护接地的确定，使其设计可靠性高、功能完善、组合灵活，以及功耗低，保证采区供电安全、经济、高效平稳运行。 关键词： 供电设计； 选用； 变压器； 开关； 电缆； 　　　　　　　　　　　　　　 目　　　　录 摘 要·································································1 第一章 绪论···························································4 第一节 概述···························································4 第二节 主要设备配置···················································4 第二章 供电系统的选择确定···········································4 第一节 供电变电所·····················································4 第二节 供电系统构成···················································5 第三章 负荷统计及移动变电站选择····································5 第一节 负荷统计·······················································5 第二节 移动变电站选择·················································5 第四章 电气设备的选型···············································6 第五章 高、低压电缆选择与校验······································6 第一节高压电缆的选择计算··············································6 第二节 3300V系统电缆选型·············································7 第三节 按允许电压损失校验电缆截面·····································8 第四节 1140V设备电缆选型、校验········································9 第六章 短路电流计算··················································13 第一节 1回路（煤机）···················································13 第二节2回路（工作面运输机供电系统）···································14 第三节 2回路（1140V供电系统）·········································15 第七章 高压开关的热稳定校验及开关断能力校验······················16 第八章 过电流保护装置的整定计算与校验·····························17 第一节 移变低馈的整定·················································17 第二节 移变高压保护的整定·············································18 第三节高爆开关的整定与校验············································19 第四节3300VKE3002型开关计算整定·························