Study on Current Travelling Wave Transmission Characteristics in Secondary Control Cable Connected with CT.

Abstract: Secondary control cable is one of the important parts for protection device to get the accurate fault generated current travelling waves. This paper studies current travelling wave transmission characteristics in secondary control cable based on Alternative Transient Program (ATP). Valuable transmission characteristics of control cable have been got from the simulation results: current travelling waves which pass the control cable will be distorted and some interfering current travelling waves will be generated; duration of interfering current travelling waves depends on the length of the control cable; the original fault generated current travelling wave wave-front is delayed and smoothed by the control cable; magnitude of fault generated current travelling wave wave-front has been varied by the control cable. And these transmission characteristic of control cable provide useful references to the protection algorithms based on fault generated current travelling waves. [Copyright &y& Elsevier]