一种新型配电线路电力综合监控仪

A New Model Integrated Feeder Monitoring Instrument

给出了一种采用RS 4 85通信的方法 ,实现了在电力系统中综合监控仪与TA ,TV之间距离较远时二次侧信号的数字传送 ,该方法替代了导线直接传送的方式 ,解决了由此造成的测量精度不高和因二次侧开路烧毁TA的问题 ,并采用FFT算法实现数字滤波技术 ,能够准确计算出基波及各次谐波电压和电流。实际运行结果表明 ,提高了数据测量精度和TA运行的安全性。

With the communication based on RS?485 between the integrated feeder monitoring instrument and the TA or TV in electric power system,the long distance transmission of the secondary side signals replaces the direct connection with signal cable.It solves the problems of low measuring precision and TA damage by open secondary circuit.The voltage and current of the base wave and high harmonic waves can be calculated precisely based on FFT technique.It has been proved in practice that both the measuring precision and the TA operation security and reliability are improved.