LIU Qing, ZHANG Yu-feng, CHENG Yong. Research on Protection Against Lightning Over-voltage on Transformer in a 220 kV GIS Substation[J]. High voltageapparatus, 2008, (4): 329-331.
LIU Qing, ZHANG Yu-feng, CHENG Yong. Research on Protection Against Lightning Over-voltage on Transformer in a 220 kV GIS Substation[J]. High voltageapparatus, 2008, (4): 329-331.DOI:
The lightning over-voltages on transformers and the equipments in GIS in a 220 kV gas insulated substation(GIS) were calculated with ATP-EMTP software.The effects of operation modes and entrance capacitance value on lightning over-voltage were analyzed
and different protective schemes of transformer with MOA were compared.The results show that even for the transformer which is connected to GIS by cable line
its side MOA is unnecessary;the MOAs on three entrance cables provide reliable protection of transformer;and the entrance capacitance has little effect on lightning over-voltage.