transformer solution for substation 220/115/37kV [Jan 07,2016]
The long-range view of this substation is 3 sets of 300MVA three-roll off-circuit regulating transformers,the rated voltage is 220± *1.5%/115/37kV,the capacity ratio is 300/300/160MVA,the vector group is YN,yn0,d11. 220kV side adopts line transformer bank wiring connection form,totally 3 rounds of incoming lines .110kV side adopts single busbar 3-section wiring form,totally 12rounds of outgoing lines. 35kV side adopts single busbar 6-section wiring form ,totally 30 rounds of outgoing lines. The scale of the present phase is 2 sets of 3 sets of 240MVA three-roll off-circuit regulating transformers, the rated voltage is 220± *1.5%/115/37kV, the capacity ratio is 240/240/160MVA, the vector group is YN,yn0,d11. The present phase of 220kV side is 2 rounds of main transformer incoming line bay, the present phase of 110kV side is 8 rounds of outgoing lines. And the present phase of 35kV side is 20 feedback lines.
This substation is full indoor non-attended substation,. The length from east to west is 62meters and width from north to south is 57meters, which is a 3-floor building