基于光纤荧光的配电网高压开关柜隔离触头温升实时监测

Real Time Monitoring for Temperature Rise of Isolated Contacts of High Voltage Switchgear in Distribution Network Based on Optical Fiber Fluorescence

现有的温升监测方法在传输信号时对干扰信号的排除效果较差,导致监测误差较大,为此,基于光纤荧光设计了配电网高压开关柜隔离触头温升实时监测方法。计算光纤荧光损耗,获取每根光纤的特定损耗系数;基于荧光损耗模型降低信号干扰,将最小提取值代入到随机干扰信号中,建立荧光损耗模型;转换实际温度值与寄存器温度值,设计配电网高压开关柜隔离触头温升实时监测算法。对比实验数据显示,在四种温升监测方法中,所提方法的误差在常见的温度区间内均小于0.03。由此可见,基于光纤荧光的配电网高压开关柜隔离触头温升实时监测方法较其他温升监测方法精度更高。

The existing temperature rise monitoring methods have poor effect in eliminating interference signals in signal transmitting,which leads to large monitoring errors.Therefore,a real-time temperature rise monitoring method for isolated contacts of high-voltage switchgear in distribution network is designed based on optical fiber fluorescence.The fluorescence loss of optical fiber is calculated,and the specific loss coefficient of each optical fiber is obtained.Based on the fluorescence loss model,the signal interference is reduced,and the minimum extraction value is substituted into the random interference signal to establish the fluorescence loss model.The real-time monitoring algorithm for the temperature rise of isolated contacts of high-voltage switchgear in distribution network is designed by converting the actual temperature value and register temperature value.The experimental data show that the error of the proposed method is less than 0.03 in the common temperature range.It can be seen that the real-time monitoring method based on optical fiber fluorescence is more accurate than other methods.