Title :
A study of fast transients in gas insulated substations
Author :
Coventry, P.F. ; Wilson, A.
Author_Institution :
Nat. Grid Res. & Dev. Centre, Leatherhead, UK
Abstract :
Experimental and theoretical techniques are being used to investigate the response of gas-insulated substations (GISs) to fast transients. Sensors were developed to record fast transient waveforms accurately over a wide frequency range. Their performance under fast transient conditions was verified using a D-dot probe with a known response. Good agreement was recorded by instrumentation with a 200-MHz bandwidth. A computer code was developed to enable electrical stresses in a GIS under fast transient conditions to be studied. The program solves Maxwell´s equations in two dimensions using a finite-difference method. The electric field structure around insulating barriers was studied, and initial results are presented
Keywords :
finite element analysis; gaseous insulation; substations; transient response; transients; 200 MHz; 200-MHz bandwidth; D-dot probe; GIS; Maxwell´s equations; computer code; electric field structure; electrical stresses; fast transient conditions; fast transient waveform recording; finite-difference method; gas insulated substations; insulating barriers; two dimensions; wide frequency range; Bandwidth; Finite difference methods; Frequency; Gas insulation; Geographic Information Systems; Instruments; Maxwell equations; Probes; Stress; Substations;
Conference_Titel :
Electrical Insulation, 1990., Conference Record of the 1990 IEEE International Symposium on
Conference_Location :
Toronto, Ont.
DOI :
10.1109/ELINSL.1990.109748
