Transformers and circuit breakers are essential equipment in traction power supply systems. Once a fault occurs, it will affect the train’s regular operation even threaten passengers’ personal safety. Therefore, is to diagnose faults of transformers system. At present, companies have made many achievements diagnosis equipment, but there still problems with real-time accuracy. The Internet Thing...

Abstract This paper presents a dynamical model for the dynamics of bimetallic strip in industrial circuit breakers. The acts as thermo-mechanical actuator that opens breaker case overloads. overall can be decomposed two submodels: an electrothermal and one. first submodel is derived gray-box, while second one black-box. Given estimated model, final aim to determine appropriate calibration actio...

This paper points out possible applications of a tapped reactor, which is series connected to a HV transmission line. The different taps of the reactor can be short-circuited by switching elements in order to achieve a stepwise adjustable impedance. Vacuum Circuit Breakers (VCBs) are used in this case as switching elements as they can be switched more often without maintenance compared to other...

-This paper examines the impact of the network modification produced by the replacement of an existing conventional generator with a high voltage directly connected generator on the adequacy of existing circuit breakers distributed throughout a high voltage transmission network. The significance of generator design changes is assessed by comparing the critical fault types producing maximal circ...