计量学报2024，Vol.45Issue(2)：261-268,8.DOI:10.3969/j.issn.1000-1158.2024.02.17
塑壳断路器可靠性试验电源的光纤校准技术研究
Research on the Fiber-optic Calibration Technology for the Reliability Test Power Supply of Molded Case Circuit Breakers
摘要
Abstract
In consideration of the characteristic properties of the reliability test current for the molded case circuit breakers(MCCB)including high value,short time and AC/DC hybrid and the high requirements of field conditions to the reference high current sensors,a field calibration method of reliability test power supply for the MCCB based on the fiber-optic current sensing technology is proposed.The dynamic model of the sensor is established according to the closed-loop signal-detecting principle of the fiber-optic current sensor.The step response and frequency response characteristics of the system are analyzed.The simulation results show that by adjusting the forward gain and sliding filter order of the system,the rise time of the sensor is better than 9.09 μs,and the-3 dB bandwidth can reach 39.91 kHz,and prove the tracking response capability of the sensor to the reliability test current of the MCCB.The fiber-optic current sensor is calibrated based on the equal ampere-turn method.The uncertainty of the calibration result is evaluated,and the results show that within the range of 2.5 kA to 60 kA,the measurement accuracy of the sensor's DC and power frequency currents is better than 0.2％.The field test of the reliability test current of the MCCB is performed.The mentioned research provides a technical route for the field calibration of the reliability test power supply of the molded case circuit breaker.关键词
大电流测量/塑壳断路器/光纤电流传感器/现场校准Key words
high currents measurement/molded case circuit breaker/fiber optic current sensor/field calibration分类
通用工业技术引用本文复制引用
张恒,李灵至,李传生,谭向宇,周仿荣,蔡慧..塑壳断路器可靠性试验电源的光纤校准技术研究[J].计量学报,2024,45(2):261-268,8.基金项目
云南省科技揭榜制项目(202104BN050011) （202104BN050011）
中国南方电网公司重点项目(YNKJXM20210075) （YNKJXM20210075）
