互感器极性智能检测系统设计

互感器可以实现大电压、大电流信号向小电压、小电流信号的转换。互感器接线是否正确,对电力系统实现可靠监控、保护有十分重要的意义。文章针对目前应用直流法进行互感器极性检测时实施过程繁琐、劳动强度大、工作效率低,容易产生误判等问题,提出了一种基于单片机的互感器极性智能检测方法,该方法通过对激励电源及互感器二次侧数据的快速、高精度处理,实现对互感器极性的初步检测,单片机根据极性检测电路输出的结果,判定电流互感器的极性,对检测结果进行语音、LCD提示,并可通过网络进行远距离传输。实验表明:该方法可以准确、快速、便捷的检测互感器的极性。

The transformer can realize the conversion from high voltage and high current signal to small voltage and small current signal.Whether the transformer connection is correct or not is of great significance to the realization of reliable monitoring and protection of power system.In order to solve the problems of tedious implementation process,high labor intensity,low working efficiency and easy misjudgment in the application of DC method to transformer polarity detection,an intelligent transformer polarity detection method based on single chip microcomputer is proposed in this paper.In this method,the polarity of the transformer is preliminarily detected by fast and high precision processing of the data of the excitation power supply and the secondary side of the transformer,and the polarity of the current transformer is determined by the single chip microcomputer according to the output result of the polarity detection circuit.The detection results are prompted by voice and LCD,and can be transmitted over a long distance through the network.The experimental results show that this method can detect the polarity of transformer accurately,quickly and conveniently.