数字温控技术在全光纤电流互感器中的应用

Application of a new type digital temperature control technology in all optical fiber current transformer

针对反射式全光纤电流互感器(OCT)输出随温度漂移的问题,设计了1种新型数字温控算法及电路,在全温(-40^+70℃)下验证了温控方案及温控算法的正确性。试验结果表明:在全温范围内,温控系统可以很好地把互感器光路系统温度控制在25~50℃以内,大大压缩了光纤电流互感器的实际工作温度范围,使电流互感器输出稳定在0.2级以内。

Aiming at the problem of reflex all optical fiber current transformer (OCT)output with temperature drift,designs a new digital temperature control algorithm and circuit,in the whole temperature (-40 ~ +70 ℃) verifies the accuracy of the schemes and algorithm of temperature control,the result shows that:in the range of the whole temperature,the temperature control system can well control the temperature of transformer optical system within 25~50 ℃,greatly compresses actual operating temperature range of fiber current transformer,so the current transformer output can be kept within the 0.2 level.