地区变电房设计.docVIP

大型地区变电所电气主接线方案与布置初步设计 摘要 本次220kv变电所的一次部分初步设计，主要是确定合适的主接线方案、对变电所站负荷计算、确定变压器台数和容量、短路电流的计算、选择高电压电气设备及继电保护的配置。主接线部分是设计的基础部分，主要介绍了主接线的形式，综合比较各种接线方式的特点、各自的优缺点及变压器的选择原则，根据任务书要求最终选择满足设计任务的主接线方案和变压器。220kv和110kv侧选择了双母线接线，10kv侧选择单母线分段。主变压器选择了容量为150000kVA三绕组变压器。短路电流计算时选择各侧母线为短路点，短路电流时非常重要的部分，它主要介绍了对称短路计算的目的、原则、方法和具体的数据信息等，为设计中需要的高压电气设备的选择、整定、校验等方面做准备，电气设备的选择及校验主要是利用对称短路的计算结果进行高压电气设备（断路器、隔离开关、母线）的校验。 关键词：220kv变电所；主接线；设备选择 LOCAL TRANSFORMER SUBSTATION PROGRAM MAIN WIRING PLAN AND ARRANGEMENT ABSTRACT This paper designed the 220kv trsformer substation.This part mainly choose the capacity and spwecification of transformer and all kinds of devices.It also calculate the burden and the short-circuit current.On the main wiring part of the contents of infrastructure,mostly focus on the main wiring plan,comprehensive comparing the different forms of characteristics,advantages and disadvantages and each option transformer principles.Under the mandate calls for a final choice on the design of the main tasks connection program.220kv and 110kv sides lecr double bus-bar connection 110kv side choose connection,while 10kv side chosse connection of single bus-bar section.Main transformer used the three-winding transformer with the capacity of 150000kVA.The short points of short circuit calculation are the bus-bar of each side.Short-circuit current is a very important part.This design introduces purposes,methods and specific data information of calculating short-circuit current in different modes of operating under the symmetric situation.So that the design of the high voltage electrical equipmen selection could be determined,tuned and tested.Electrical equipmen selection and verification are using the calculation results of symmertric short-circuit to calibrate hign voltage electrical equipments which includ breakers,bus-bar and disconnectors. Key words: 220kv transformer substation; mian wiring; equipment selectior 目录 1 电气主接线选择 7 1.1 220KV侧主接线