1. China Jiliang University,Hangzhou,Zhejiang 310018,China
2. National Institute of Metrology,Beijing 100029,China
3. Yunnan EPRI, Kunming, Yunnan 650214, China
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 9.09μs, and the -3dB bandwidth can reach 39.91kHz, 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 2.5kA to 60kA, the measurement accuracy of the sensors 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.
ZHANG Heng,LI Lingzhi,LI Chuansheng, et al. Research on the Fiber-optic Calibration Technology for the Reliability Test Power Supply of Molded Case Circuit Breakers[J]. Acta Metrologica Sinica, 2024, 45(2): 261-268.
WANG S Q, ZHANG J Q, CUI S Y, et al. Pulse High Current Calibration System［J］. Acta Metrologica Sinica, 2020, 41(3): 296-300.
ZHAO Y M, WANG X F, LI C S, et al. Research on Fiber-optical Welding Current Measurement Technology［J］. Acta Metrologica Sinica, 2022, 43(8): 1083-1088
LI C S, LI Q, LIN F P, et al. Optical Fiber Ultra-High Current Online Metrology Technology［J］. Metrology Technology, 2020(5): 51-54+73.
CUI S Y, WANG S Q, MA Z Y. Research on Development Status of Pulse Current Shunts［J］. Aerospace Measurement Technology, 2016, 36(6): 82-88.
ZHANG C Y, ZHANG C X, WANG X X, et al. Signal Processing System for Digital Closed-loop Fiber Optic Current Sensor［J］. Chinese Journal of Electrical Engineering, 2009, 29(30): 42-46
［3］
GB/Z 22074-2016塑料外壳式断路器可靠性试验方法［S］.
LI X L, JIANG G P, SHI X R. Design Research on Improving Short-Circuit Breaking Capacity of DC MCCB［J］. Electric Appliance and Energy Efficiency Management Technology, 2021(7): 45-50.
ZHENG Q J, CHEN W. Solution and design of circuit trip unit for circuit breaker based on thermal diode［J］. Electrical Measurement and Instrumentation, 2020, 57 (8): 140-146.
PENG C G, CHENG S Y, FU Z C. Comparative Study on AC and DC Breaking Characteristics of Moulded Case Circuit Breakers［J］. Electrical Appliances and Energy Efficiency Management Technology, 2021(6): 73-78.
ZHOU F, LI H, LI W T, et al. Review of High Current Measurement and Sensing Technology［J］. High Voltage Technology, 2021, 47(6): 1905-1920.
ZHANG G, WANG C Y, CHEN Y P. Transient Behavior of PCB Air-Core Coil Current Transformer［J］. Journal of Electrical Technology, 2010, 25(11): 85-89.
LI Q, LI C S, ZHAO Y M, et al. High-order Dynamic Model and Simulation of Closed-loop Fiber-optic Current Sensor［J］. Acta Metrologica Sinica, 2021, 42(6): 785-792.
XU S Y, XUE H Y, XING F F, et al. Progress and Prospect of Research on Polarimetric Current Sensor［J］. Acta Metrologica Sinica, 2021, 42(10): 1354-1366.
［14］
LAKE J, TANTASWADI P, de CARVALHO R T. In-Line Sagnac Interferometer Current Sensor［J］. IEEE Transactions on Power Delivery, 1996, 11(1): 116-121.
MEI G J, LI C S, WANG J F, et al. Research on Measurement Technology of Power Frequency Short-circuit Current of Transformer［J］. Acta Metrologica Sinica, 2021, 42(10): 1343-1348
［13］
FROSIO G, DNDLIKER R. Reciprocal reflection interferometer for a fiber-optic Faraday current sensor［J］. Applied Optics, 1994, 33(25): 6111-6122.
2024, Vol. 45 
