Practical Research on a New Type of Electric Field Sensor

Aiming at the problems of large size, limited measurement band range and high cost of traditional voltage transformers, this paper designs a new electric field sensor based on the D-dot principle, which is only the size of a coin and the volume is greatly reduced. The static response and frequency characteristics of the sensor are tested by the built sensor performance test platform, and the test results show that the sensor can produce good static response for different waveforms, and the measurement frequency range is between 10Hz-l0kHz and has good linearity, which can not only realize low-frequency measurement but also meet the requirements of high-frequency measurement. Furthermore, the sensor is placed under the simulated transmission line, and the experimental results show that the output law of the sensor is consistent with the simulation results under different spacing and different voltage levels, in line with the electromagnetic field distribution law. Finally, the cost is compared and analyzed, and the analysis shows that the sensor has a high cost performance, which shows that the sensor has broad practical application prospects.