transformer solution for 110kv substation [Jan 07,2016]
The final scale of this substation is 3 sets of 40MVA main transformers,the rated voltage is 110kV/10kV,the 110kV side of No.1 and No.2 main transformer adopts the connection of 1 incoming line and 3 outgoing lines(sub-circuit transformer),No.3 main transformer adopts the ring-into and ring-out connection. The 10kV side is single busbar 6-section wiring, 36 rounds of outgoing lines. 10kV is neutral point grounding through small resistor, every main transformer is equipped with 2units of 10kV capacitor 3000var. the scale of the present phase is No.1 and No.2 ,the capacity of main transformer is 40MVA ,the wiring of 110kV side adopts the connection of 1 incoming line and 3 outgoing lines(sub-circuit transformer), the 10kV side adopts single busbar 4-section wiring,24rounds of outgoing lines. Every main transformer is equipped with 2 units of 10kV capacitor 3000kvar, 10kV neutral point adopts grounding through small resistor.
This substation is full indoor two-layer layout, the length from north to south is 38.1 meters,the width from east to west is 19.1meters.
This substation is non-attended substation,which adopts A2-3 scheme recommended in "State Grid Company transmission and transformation project general design 110(66) ~500kV substation part"2011 vision