Analysis and Preventive Measures of Power Increase Caused by Voltage Transformer Loss Fault

V/V-12 wire voltage transformer is widely used in ungrounded neutral and high impedance grounded systems, and is usually used for 10kV high supply and high meter users. When the voltage transformer has a voltage loss fault, it will cause measurement errors, and there are risks such as measurement misalignment and power supply service complaints. This paper analyzes the change of the curve data of the acquisition system after the failure of voltage transformer, which causes the power increase in the user of 10kV high supply and high meter using V/V-12 connection voltage transformer. Combined with the nature of the load to calculate the power supply, the paper put forward detailed preventive measures to effectively prevent various risks.