METHOD FOR SYNCHRONISATION OF TRACTION CONVERTER CONTROL SYSTEM WITH TRACTION NETWORK SUPPLY VOLTAGE

摘要

FIELD: transportation; electricity.;SUBSTANCE: invention relates to electrical traction systems of vehicles. Method of synchronising the control system of traction converters with the traction network voltage consists in that, by means of a measuring transformer, a signal proportional to the voltage of the traction network is obtained. Harmonic signal generators generate: one – a sinusoid and another – a cosine wave with a period equal to the period of the voltage the traction network. Product of the signal from the transformer output and the signal of the sinusoid generator is fed to a first integrator, and the product of the signal from the output of the transformer and the signal of the cosine wave generator is fed to a second integrator. Signal from the output of the first and second integrators is fed to the first input of the first and second adders respectively, to the second input of which is transmitted a signal which is inverted and delayed for a time equal to the traction network voltage period, said signal coming from the output of the first and second integrators, respectively. Signals from the outputs of the first and second adders are multiplied by signals of the sinusoid and cosine wave generators, respectively, the products are summed by a third adder, a synchronising signal is obtained and, when it passes through zero, synchronisation pulses are formed.;EFFECT: technical result is higher accuracy and reliability of synchronisation.;1 cl, 1 dwg