APPARATUS FOR DETECTING PHASE ERROR OF WATT-HOUR METER AND METHOD THEREOF

摘要

The present invention provides an apparatus for detecting a phase error of a watt-hour meter and a method thereof which sense and output a phase error in real time. The apparatus for detecting a phase error of a watt-hour meter comprises: a phase voltage measurement unit to measure a phase voltage of each phase in a watt-hour meter which measures wattage on a secondary side of an MOF connected to a primary side of a transformer of a power-receiving facility; a phase current measurement unit to measure a phase current of each phase in the watt-hour meter; a metering control unit to meter three-phase four-line wattage on each phase based on the phase voltage of each phase inputted from the phase voltage measurement unit and the phase current of each phase inputted from the phase current measurement unit, meter three-phase three-line wattage on each phase based on the phase current and a line-to-line voltage calculated from the phase voltage of each phase, compare the three-phase four-line wattage and the three-phase three-line wattage on each phase with each other to detect a phase error, and output a detection resu and an output unit to output the detection result of the phase error detected from the metering control unit.;COPYRIGHT KIPO 2020