FIELD: electricity.
SUBSTANCE: invention relates to electrical engineering. A method of electrical energy transfer in a DC electric-traction network of urban electrified transport through an AC municipal network is proposed to improve the quality of voltage in both networks simultaneously. Operations of the method comprise integration of DC and AC networks by means of booster transformers connected at the input of municipal transformer substations, and transistor voltage inverters connected to a traction network, with addition of branch line switching operations on the high side at the main transformers of municipal transformer substations by means of mechanical switches. Transformation coefficients of the main transformers of municipal transformer substations are changed by branch line switching; with that, at the beginning of the electric-traction network where voltage is increased an increased transformation coefficient is set, and at the end of the electric-traction network where voltage is decreased a decreased transformation coefficient is set. Transformation coefficients of the rest municipal transformer substations are uniformly changed relative to the nominal value from increased to decreased one as far as they go from the beginning of the electric-traction network to its end.
EFFECT: method allows obtaining the following technical result: redistribution of energy from the beginning of the electric-traction network to its end through municipal networks, thus equalising voltage throughout the length of the electric-traction network with simultaneous voltage stabilisation at the input of municipal substations.
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