Temperature error suppression and compensation technology of fiber optic current transformer

摘要

Based on the problem of accuracy ratio drift with temperature in FOCT engineering application, the conclusion that the main FOCT temperature error is coming from some optic devices as the sensor unit, SLD source, phase modulator, delay fiber is described. Feasible methods to restrain temperature error are discussed from a technical point of view, FOCT engineering prototype is developed and the temperature error is achieved only ±0.1% with FPGA software temperature compensation.