Method and device for calculating correction coefficient based on three-phase three-wire metering device

The embodiment of the invention discloses a correction coefficient calculation method based on a three-phase three-wire metering device, the three-phase three-wire metering device is electrically connected with a three-phase access line, and the calculation method comprises the following steps: detecting a three-phase phase voltage vector and a two-phase phase current vector of the three-phase three-wire metering device under any wiring; according to the three-phase phase voltage vector and the two-phase phase current vector, determining an actual wiring phase sequence and an open-phase position of the three-phase three-wire metering device; calculating an actual active power value according to the open-phase position and a first preset rule; and determining a correction coefficient according to the actual active power value and the theoretical active power value. According to the technical scheme provided by the embodiment of the invention, the calculation efficiency and accuracy of the correction coefficien