总降压变电所设计 工厂供电毕业设计

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。

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关键词：节能 配电 安全 合理 发展

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目录

摘要 ·································································································································································· I ABSTRACT ················································································································ 错误！未定义书签。 1绪论 ······························································································································································ 1 1.1设计题目········································································································································ 1 1.2设计依据········································································································································ 1 1.2.1工厂总平面布置图（略） ········································································································· 1 1.2.2全厂各车间负荷情况汇总表。 ································································································· 1 1.2.3供用电协议。 ····························································································································· 2 1.2.4工厂的负荷性质 ························································································································· 3 1.2.5工厂的自然条件 ························································································································· 3 1.3设计任务及设计大纲 ···················································································································· 3 1.3.1高压供电系统设计 ····················································································································· 3 1.3.2总变电所设计 ····························································································································· 3 1.4设计成果········································································································································ 4 1.4.1设计说明书 ································································································································· 4 1.4.2设计图纸····································································································································· 4 2供电电压等级选择 ····································································································································· 5 2.1电源电压等级选择 ························································································································ 5 3全厂负荷计算 ············································································································································· 5 3.1变电所的负荷计算 ························································································································ 5 3.1.1用电设备的负荷计算 ················································································································· 5 3.1.2变压器损耗估算 ························································································································· 6 3.1.3无功功率补偿计算 ····················································································································· 7 3.1.4变压器选择 ································································································································· 8 4系统主接线方案的选择 ···························································································································· 9

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4.1方案1：单回路高压线路—变压器组、低压单母线分段主接线 ············································· 9 4.2方案2：双回路高压线路—变压器组、低压单母线分段主接线 ············································· 9 4.3方案的比较与选择 ························································································································ 9 5变电所位置及变压器、配电装置选择 ································································································· 11 5.1变电所位置·································································································································· 11 5.2变压器选择·································································································································· 11 5.3所用变压器选择 ·························································································································· 11 5.3配电装置选择 ······························································································································ 11 6短路电流计算 ··········································································································································· 12 6.1确定计算电路及计算电抗 ·········································································································· 12 6.2最大运行方式下的短路点计算 ·································································································· 13 6.3最小运行方式下的短路点计算 ·································································································· 14 7高压电气设备的选择 ······························································································································ 16 7.1 35KV架空线的选择 ················································································································· 16 7.2 10KV母线的选择 ····················································································································· 16 7.3高压断路器的选择 ······················································································································ 18 7.4高压隔离开关的选择 ·················································································································· 19 7.5电流互感器的选择 ······················································································································ 20 7.6电压互感器的选择 ······················································································································ 22 7.7. 10KV高压柜的选择 ··················································································································· 24 8继电保护装置设计 ··································································································································· 25 8.1.继电保护配置 ······························································································································ 25 8.2主变压器保护的继保整定 ·········································································································· 26 9接地及防雷设计 ······································································································································· 28 9.1防雷设计······································································································································ 28 9.2接地设计······································································································································ 28 致谢 ··················································································································································· 30

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参考文献目录 ·············································································································································· 31 附录1：设备汇总一览表 ·························································································································· 32 附录2：所区平面布置图 ·························································································································· 33

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