Power electronic hybrid voltage regulating device and voltage regulating method

Abstract

A power electronic hybrid voltage regulating device and voltage regulating method are provided. The voltage regulating device includes a shunt converter, a series converter and a series compensation transformer. A first end of the shunt converter is connected to an input end to receive an input voltage. The shunt converter is configured to stabilize a DC link voltage of the input voltage. A first end of the series converter is connected in parallel to a second end of the shunt converter. A first end of the series compensation transformer is connected to the input end via a feeder line to receive a feeder voltage. A second end of the series compensation transformer is connected to a second end of the series converter. A third end of the series compensation transformer is connected to a feeder voltage sensing end. The series converter is configured to perform a voltage swell compensation operation or a voltage drop compensation operation according to a voltage value at the feeder voltage sensing end, the feeder voltage or the DC link voltage.

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