PT二次回路压降无线检测同步法研究与实现

Research and implementation of synchronization method on PT secondary loop voltage drop

提出了可以用于PT二次回路压降无线检测的电流同步法,弥补了基于GPS同步的测试仪的不足。利用二次回路中的电流取样信号的过零点信号作为同步源信号,主从机之间通过握手实现测试启动同步;整周期的多点采集的同步通过测试步长修正法实现。试验样机的性能测试能够满足相关国标的要求,新型测试仪器将会在行业中推广使用。

This paper puts forward a current synchronization method of wireless measurement that can be used for the PT secondary loop voltage drop,and makes up for the inadequacy of tester based on GPS synchronization.It uses the passing zero signal of the loop current sampling signal as source signal of synchronization,and start measurement synchronization is achieved by shaking hands between master-slave machines.The synchronizations of multipoint sampling in whole cycle are achieved by testing step correction method. The test prototype performances can meet the requirements of relevant national standards,and the new test equipment will be used widely in the industry.