CONTROL METHOD OF MULTI-ZONE RECTIFIER-INVERTER CONVERTER OF SINGLE-PHASE ALTERNATING CURRENT Russian patent published in 2021 - IPC H02M1/42 H02M5/257 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to conversion equipment, and can be used as control method of multi-zone rectifier-inverter converter on electric rolling stock, receiving power from single-phase alternating current contact network. In the multi-zone rectifier-inverter converter method of single-phase alternating current containing four zones based on parallel thyristor bridges, when adjusting the rectified voltage, the rectified converter circuit of the converter is shunted by switching on a chain consisting of series-connected power diodes, in parallel to which a capacitor is connected, and a connected transistor, opposite to which the second power diode is connected, and the connected by diode anode to the anode and the emitter of the transistor to the cathode buses of the converter, and disconnection of said chain is carried out in contactless manner by means of transistor switching-off at converter transition from rectifier mode to inverter and vice versa. Adjustment of the rectified voltage of the converter on the first zone is carried out by controlling control of the moment of switching on of the transistor in the previous half-period of voltage in the range of phase angles from ωt=π-85° up to ωt=π-25° and controlling control of the transistor cut-in time in the next network voltage half-period in the range from ωt=85° up to ωt=25°. Method of multi-zone rectifier-inverter converter of single-phase alternating current control is implemented in device containing single-phase transformer, four-zone rectifier-inverter converter based on parallel thyristor bridges, power diode and transistor chain, in which capacitor is connected in parallel to diode, and to transistor counter-parallel second power diode, converter rectified current circuit (current consumer in rectifier mode or voltage source in inverter mode).

EFFECT: technical result is increase of power factor of rectifier-inverter converter of single-phase alternating current at the first zone at rated load in rectifier mode from 0.65 to 0.96, id est by 32%, and in inverter mode - from 0.61 to 0.95, id est by 35%.

1 cl, 3 dwg