Abstract
This graduate design thesis is a City southTransformer Substation Two Times Electrical Engineering (part) Design. Whole thesis besides summary graduate to design the book outside, returned the expatiation every kind of most basic request that equipments choose with principle according to. The choice of the transformer includes: Main transformer use the main technique in number, capacity, model number...etc. in set data of the transformer to really settle; The electricity lord connected the line to introduce primarily the electricity lord connects the linear importance, design according to, the basic request, every kind of merit and shortcoming and lords that connect the line form connects the linear choosing more, the lord that combine to establish the in keeping with my plant the request connects the line; The transformer substation connects with the electricity the line includes: The transformer substation connect the linear total request and factory to connect the line design with the mother line with the electricity. The short-circuit galvanometer is regarded as the most important link, this thesis introduced the calculating purpose in short-circuit electric current, assumption term, general provision, the calculation, network transformation of a parameter detailed, and each calculation etc. knowledge that short circuit order; The choice of the high pressure electricity equipments includes the mother line, high pressure breaks the road machine and insulate the switch, electric current to feels with each other the machine, electric voltage feels with each other the choice principle of the machine, high pressure switch cabinet with request, and proceed to these equipments the school check with the related introduction in product. But go together with the design principle of the electricity device, request to go together with the electricity device with 60 KV according to this thesis a high pressure for introducing, decide this time design to adopt the cent the mutually medium-sized arranging to the my plant. After electricity protection with the programming of the automatic device, include total, automatic device, general provision with the protection of generator, transformer, mother line etc. equipments, but power plant with change to give or get an electric shock a design for defending thunder protecting then primarily aiming at lightning rod with lightning arrester. In addition, return in the appropriate position in thesis additional diagram paper ( the
VI
lord connects the line diagram, plane chart defend thunder protection disgram, Cross section diagram etc.) and forms read, comprehend with the convenience with applied. Key word: Short circuit calculation Examination The choice of the equipments
VII
目 录
摘 要 ········································································································································································ V ABSTRACT ··························································································································································VI 引言 ··········································································································································································· 1 第一部分 说明书 ··················································································································································· 2 第一章 原始资料分析 ·········································································································································· 2 第二章 主变压器的选择 ····································································································································· 2 2.1 变电所主变压器的容量和台数 ················································································································ 2 2.1.1 变压器容量的确定································································································································ 2 2.1.2 主变压器的台数的确定······················································································································· 2 2.2 主变压器型式的选择 ·································································································································· 2 2.2.1 相数的选择 ············································································································································· 2 2.2.2 主变压器绕组的数量 ··························································································································· 3 2.2.3 绕组连接方式········································································································································· 3 第三章 电气主接线的选择 ································································································································· 4 3.1 主接线方案 ······················································································································································ 4 3.1.1 主接线方案的确定································································································································ 5 3.1.2 主接线二次方案的几点说明 ·············································································································· 6 第四章 短路电流计算 ·········································································································································· 7 4.1 电路元件参数计算······································································································································· 7 4.1.1 基准值计算 ············································································································································· 7 4.1.2 各元件参数标幺值的计算 ·················································································································· 7 4.2 网络变换 ························································································································································ 8 4.3 分支系数的计算 ··········································································································································· 8 4.4 转移电抗、计算电抗的求得····················································································································· 8 4.5 冲击电流的求得 ··········································································································································· 9 4.6 短路容量的求得 ········································································································································· 10 第五章 电气设备的选择 ··································································································································· 11 5.1 高压断路器的选择····································································································································· 11 5.1.1 60KV侧高压断路器得选择 ············································································································· 12
VIII
5.1.2 10KV侧高压断路器的选择 ············································································································· 13 5.2 隔离开关的选择 ········································································································································· 15 5.2.1 60KV侧隔离开关的选择·················································································································· 16 5.2.2 10KV侧隔离开关的选择·················································································································· 16 5.3 互感器的选择·············································································································································· 16 5.3.1 电压互感器的选择······························································································································ 17 5.3.2 电流互感器的选择······························································································································ 18 5.4 补偿装置的选择 ········································································································································· 19 5.5 母线的选择 ·················································································································································· 21 5.6.1 60KV 侧母线的选择 ·························································································································· 21 5.6.2 10KV 侧母线选择E ··························································································································· 21 5.6 避雷器的选择·············································································································································· 22 5.7 主要设备表 ·················································································································································· 22 第六章 继电保护及自动装置规划设计········································································································· 23 6.1 60KV线路保护 ·········································································································································· 23 6.2 主变压器保护·············································································································································· 23 6.3 10KV侧线路保护······································································································································ 24 6.4 并联电容器组保护····································································································································· 24 6.5 变压器备用电源自投装置 ······················································································································· 25 6.6 10KV分段开关备用自投装置 ··············································································································· 25 第七章 配电装置设计 ········································································································································ 26 7.1 总的原则 ······················································································································································ 26 7.2 设计要求 ······················································································································································ 26 7.2.1 满足安全净距的要求 ························································································································· 26 7.2.2 施工、运行和检修的要求 ················································································································ 26 7.2.2.1 施工要求········································································································································· 26 7.2.2.2 运行要求········································································································································· 27 7.2.2.3 检修要求········································································································································· 27 7.2.3 噪音的允许标准及限制措施 ············································································································ 28 第八章 过电压防雷保护 ··································································································································· 29 8.1 直击雷的保护范围和保护措施 ·············································································································· 29 8.2 避雷针保护对象 ········································································································································· 29
IX
8.2 避雷针保护范围的计算···························································································································· 29 第二部分 计算书 ················································································································································· 31 第一章 变压器容量的确定 ······························································································································· 31 第二章 短路计算 ················································································································································· 31 2.1 元件参数计算·············································································································································· 31 2.2 网络变换 ······················································································································································ 32 2.3 分支系数、转移电抗、计算电抗·········································································································· 32 2.4 基准值的计算·············································································································································· 34 2.5 冲击电流： ·················································································································································· 34 2.6 短路容量的计算 ········································································································································· 34 第三章 设备的选择 ············································································································································ 36 3.1 断路器的选择·············································································································································· 36 3.1.1 60KV侧断路器的选择 ······················································································································ 36 3.1.2 10KV侧高压断路器的选择 ············································································································· 37 3.2 电流湖互感器的校验 ································································································································ 37 3.2.1 60KV侧LCW-60型电流互感器校验 ··························································································· 37 3.2.2 10KV侧LAJ-10型电流互感器校验 ····························································································· 38 3.3 母线的选择和校验····································································································································· 38 3.4 补偿装置容量的确定 ································································································································ 39 第四章 过电压防雷保护 ································································································································· 40 4.1 单支避雷针的保护范围···························································································································· 40 4.2 两支等高避雷针的保护范围··················································································································· 41 设计总结 ································································································································································ 41 致谢 ········································································································································································· 42 参考文献 ································································································································································ 43
X