Device for detection of the phase current asymmetry in the three-phase lines of non-traction consumers

摘要

electrified railway transport receives power from the power system and operates on a single-phase current,which leads to uneven loading of networks of the traction power supply system.There is a danger of overload and additional losses of active power and electrical energy of three-phase electric motors by reverse sequence currents,therefore,any information obtained about the values(phase currents and voltages)allows carrying out corrective actions for the level of asymmetry.In this paper,discuss the design of the device for detecting the asymmetry of phase currents in three-phase lines is proposed.It is shown that the device can convert the DC current difference and measure three linear currents in a three-wire three-phase circuit.