Title :
Calculation of very fast transient over-voltage and its distribution in transformer windings in 110 kV GIS
Author :
Youhua, Gao ; Hong, Yuan ; Erzhi, Wang ; Yundong, Cao
Author_Institution :
Shenyang Univ. of Technol., China
Abstract :
Very fast transient overvoltage caused by disconnector switching of a short bus is investigated in 110 kV GIS. The overvoltage peak and rise time at the transformer´s terminals are calculated. The voltage distributions in transformer windings under transient overvoltage are shown in this paper. Several representative curves in the transformer windings are illustrated. The maximum overvoltage and electric field intensity generated in coils of wire and in wire turns are given. It is essential for the transformer´s insulation design
Keywords :
gas insulated substations; overvoltage; switchgear; transformer substations; 110 kV; GIS; VFT overvoltage distribution; coils; disconnector switching; electric field intensity; gas insulated substations; overvoltage peak; overvoltage rise time; short bus; transformer insulation design; transformer terminals; very fast transient overvoltage; voltage distributions; wire turns; Capacitance; Coils; Earth; Electromagnetic transients; Geographic Information Systems; Inductance; Power system transients; Power transformer insulation; Windings; Wire;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.970646
