Influence of Model of Surge Arrester Makes on VFTO Simulation
Tai Xiao-xu · Northeast Electric Power Technology · 2013
This paper analyses the model of the surge arrester in the simulation of the fast transient overvoltage( VFTO)when the disconnector operates in GIS using EMTP software.A variety of arrester model is put forward and analyzed,the advantages and disad-vantages of all kinds of lightning arrester model are discussed.Taking a 550 kV domestic GIS substation as an example,this paper se-lects two kinds of operation mode and calculated the VFTO that the circuit generates under the two operation mode.Finally it discusses the different lightning arrester model and the effects the calculation of the VFTO simulation results under the different modes.The cal-culation results show that it would cause the VFTO when disconnector operates under normal working condition and that the calculation results have differences with different surge arrester model.The study shows that the grounded capacitance model and the non-linear model are too simple and the calculation result error is bigger,while the mode under the consideration of polarization effect and the IEEE model are relatively accurate.However it still has problems and needs further study.