Research on decoupling method of non-contact voltage measurement

Due to the electric field interference generated by the three-phase conductor, the non-contact voltage sensor cannot directly measure the voltage value. In order to solve the problem of electric field coupling in the application of non-contact sensor, the method of electric field decoupling is studied in this paper. By analyzing the measuring principle of voltage sensor based on capacitive voltage divider, the electric field distribution at the measuring point of the sensor is analyzed, and the decoupling method is proposed. Based on the voltage decoupling calculation method, this paper proposes a factory calibration scheme for the pre-installed voltage sensor, which supports the engineering application of the sensor.