(EN) ADAPTIVE CONTROL METHOD FOR THREE-PHASE RECLOSURE OF COMPENSATED LINES WITH INNER FAULTS

(EN) The present invention relates to a method for identifying the fault clearance instant and the subsequent optimum instant for three-phase reclosure of a transmission line with shunt reactor compensation after an inner, single-phase fault condition. The optimum reclosure instant corresponds to the region of minimum beat frequency of the voltage between the contacts of the circuit-breaker after fault clearance. In this condition, reclosure reduces reclosure overvoltages and shortens the line out-of-service time if the optimum reclosure instant is shorter than the preset dead time. In addition, the present method increases the reliability of the three-phase reclosure operation in that it prevents reclosure while the fault is still present.