Development and Performance Study of Wide-band Optical Current Sensor Based on Faraday Effect
At present,there are a large number of high-frequency transient current components in smart grid and new power system.High-frequency transient current is an important information reflecting the disturbance and fault process of power system,and the real-time observation of its waveform,frequency,amplitude and other information parameters is the premise to prevent and ensure the safe and stable operation of power grid.However,the traditional current measure-ment method has some problems,such as narrow frequency band,susceptibility to electromagnetic interference and difficulty in insulation coordination,which makes it difficult to effectively detect the transient current.Therefore,a sole-noid broadband optical current sensor with anti-interference ability is proposed and designed in this paper.Based on the sensor performance test platform,the sensitivity,linearity and frequency characteristics of the sensor are studied.The re-sults show that the sensitivity of the current sensor is 62.57 mV/A and the bandwidth can reach more than 1 MHz.In addition,a DC arc experimental platform was built to measure the DC arc.The experimental results show that the sensor can effectively measure DC to the high-frequency arc components,the linear correlation between the measurement results and the standard current probe can reach 0.9971,and the relative change rate of the correlation coefficient of many ex-perimental results is less than 2%,which has a certain engineering value.
high frequency transient currentoptical current sensorperformance testfrequency characteristicsDC arc
国家科技期刊平台
NSTL
万方数据
