Title :
Statistical switching overvoltage analysis of the first BC Hydro phase shifting transformer using the Electromagnetic Transients Program
Author :
Lee, K.C. ; Poon, K.P.
Author_Institution :
BC Hydro, Vancouver, BC, Canada
fDate :
11/1/1990 12:00:00 AM
Abstract :
A 400 MVA 230 kV phase-shifting transformer (PST) is to be installed in the Nelway substation of the British Columbia Hydro (BC Hydro) transmission network in 1990. Due to the unique design and construction of the PST, a detailed analysis of the switching overvoltages for insulation coordination was required. This analysis, using the Electromagnetic Transients Program (EMTP), is described. For accurate representation of the distributed and untransposed nature of overhead transmission lines in the vicinity of the Nelway substation, the untransposed line model developed for the EMTP is used. Statistical switching studies are also performed using the EMTP. The scanned maximum overvoltages obtained from the statistical runs are used to determine the energy requirement of the metal oxide surge arresters. The overvoltage protection level of the PST and the station equipment is also investigated by statistical analysis
Keywords :
hydroelectric power stations; insulation co-ordination; overvoltage protection; power overhead lines; power system analysis computing; power system protection; power transformers; software packages; statistical analysis; surge protection; switching; transformer substations; transmission networks; 230 kV; 400 MVA; Canada; EMTP; Electromagnetic Transients Program; design; hydroelectric power stations; insulation coordination; metal oxide surge arresters; overhead transmission lines; overvoltage protection; phase shifting transformer; power system analysis computing; power system protection; software packages; statistical analysis; substation; switching overvoltage; transmission network; untransposed line model; Arresters; Circuits; EMTP; Electromagnetic analysis; Power system transients; Power transformer insulation; Power transmission lines; Statistical analysis; Substations; Voltage control;
Journal_Title :
Power Systems, IEEE Transactions on
