Analysis of the Influence of Polarity Inversion of VV Connection Voltage Transformer on Measurement

V/ V connection voltage transformer is widely used in 6kV, 10kV and other neutral point ungrounded system, mainly used in three-phase three-wire energy metering device, when the voltage transformer polarity reverse connection, will cause the smart meter voltage, phase Angle, power and other electrical parameters abnormal, resulting in metering failures. Based on the field test data, this paper analyzes in detail the data of acquisition system, field test data, phasor characteristics and power recovery, and puts forward reliable preventive measures from two aspects of management and technology, so as to ensure accurate and reliable measurement.