1、摘要 - I - 摘要 本次设计是 220kV 降压变电站设计， 电压等级为 220kV、 110kV、 35kV。 220kV 架空进线 4 回 ，两回电源线，两回负荷线。110kV 出线 10 回， 35kV 出线 12 回，为电缆出线。 本设计 220kV、110kV 侧电气主接线采用的是双母线接线，均采用高压 GIS 组合电器；35kV 侧采用单母线分段接线，选用 KYN-61 型开关柜。选用了两台 120MVA 的主变压器。 本次 220kV 输变电工程设计主要进行了短路电流计算，电气设备动、热稳 定校验，主要电气设备型号及参数的确定，防雷及过电压保护装置的设计，并 绘制了电气主接线
2、图、总平面图及各电压等级间隔断面图，较为详细地完成了 电力系统中变电站设计。 但是由于时间限制，本设计未能详细选择各种器件以及二次侧的保护设计， 对于这部分的知识还有待今后去学习探究。 关键词关键词：变电站，设计，短路计算 Abstract - II - Abstract This design is 220kV step-down transformer substation design, voltage rating from 220kV, 110 kV, to 35kV. 220kV incoming line is 4 times, which include the power c
3、ord twice, load line twice. 110kV outgoing line 10 times, and 35kV incoming line 12 times, and both of them are cable outgoing line. In this design, for 220kV and 110 kV, the main electrical wiring use the double-bus configuration wiring, and all is the high pressure GIS combination appliances; 35kV
4、 uses single- bus subsection wiring, choosing KYN- 61 type switchgear. In addition, this design adopts two 120MVA main transformers. This 220kV power transformer engineering design mainly conducted the short-circuit current calculation, the calibration of dynamic electric equipment and thermal stability, the determination of main electrical equipment model and parameter, the design of lightning protection as well as over voltage protection device, and plotted the main electrical hookup, total p
