Title :
A comparison of overvoltage control methods during three-phase reclosing varying the length of shunt compensated transmission lines
Author :
Mestas, P. ; Tavares, M.C.
Author_Institution :
Sch. of Electr. & Comput. Eng., Univ. of Campinas (UNICAMP), Campinas, Brazil
Abstract :
The overvoltage phenomena due to three-phase reclosing of shunt compensated extra high voltage (EHV) transmission lines are analyzed and verified by PSCAD/EMTDC simulation. The study made in an actual 500 kV AC transmission system considers three alternatives in order to limit overvoltages during line reclosing: a developed synchronous switching method, the use of circuit breakers with pre-insertion resistors and the use of metal oxide surge arresters at both line ends. The developed synchronous switching method detects the first minimum region of the voltage beating across the circuit breakers after protection dead time and works independently of zero voltage crossing, reducing significantly the overvoltages and reclosure time. The study was realized taking the line length as an independent parameter.
Keywords :
arresters; circuit breakers; overvoltage protection; power transmission protection; voltage control; AC transmission system; EMTDC; PSCAD; circuit breakers; extra high voltage transmission lines; metal oxide surge arresters; overvoltage control methods; preinsertion resistors; protection dead time; shunt compensated transmission lines; synchronous switching method; three-phase reclosing; voltage 500 kV; zero voltage crossing; Arresters; Circuit breakers; Power transmission lines; Resistors; Surges; Switches; Voltage control; Controlled Switching; Electromagnetic Transients; Shunt compensated transmission lines; Switching Overvoltages; Three-phase reclosing;
Conference_Titel :
Electrical Power and Energy Conference (EPEC), 2011 IEEE
Conference_Location :
Winnipeg, MB
Print_ISBN :
978-1-4577-0405-5
DOI :
10.1109/EPEC.2011.6070224
