提出了一种利用示温腊片测温原理和图像处理技术进行变电站高压触点温度在线监测的新方法,并基于该方法设计实现了一个能够实现无人值守的低成本触点温度在线监测告警系统。介绍了该系统的工作原理、组成、功能及其软、硬件设计中的几个关键问题。室内外实验表明,该系统运行可靠、效果良好,可以准确实现变电站高压触点温度的在线监测。 A new method of on-line temperature monitoring of substation high-voltage contact is proposed based on temperature principle and image processing technology. And a low-cost on-line temperature monitoring system based on this method is designed and realized . The working principle, composition, function of the system and several key problems in its hardware and software design are introduced. Indoor and outdoor experiments show that the system is reliable and has good effect and can accurately realize online monitoring of high voltage contact temperature in substation.