1results about How to "Reduce voltage deviation" patented technology

The application discloses a voltage regulation method and device for a distributed photovoltaic power distribution network. The method comprises the following steps: calculating the modulation voltage of a series converter based on a set reference voltage, an end node voltage, an input end voltage and an output end voltage of an end voltage regulator; calculating the regulation amount of an on-load voltage regulating transformer based on the reference voltage, the output end voltage of the on-load voltage regulating transformer and the input end voltage of the end voltage regulator; calculating the number of switched groups of a parallel capacitor bank in response to the absolute value of the difference between the output end voltage of the on-load voltage regulating transformer and the input end voltage of the end voltage regulator being greater than a set voltage regulating threshold; and calculating the active power reduction value of the distributed photovoltaic in response to the on-load voltage regulating transformer and the parallel capacitor bank exceeding the regulation range and still having an out-of-limit node voltage. The application can simultaneously consider the head node voltage and the end node voltage of the power distribution network and prevent voltage out-of-limit.