【摘要】 介绍了借助集成锁相芯片CD4046,利用单片机进行了电力系统谐波测量仪的开发.实验结果表明:通过硬软件的合理结合,该方案可以较好地实现谐波的同步测量,测量效果优于或等同于一些采用DSP的谐波测量装置.并且结合将等时间间隔采样变为等相位采样的思想,从根本上解决了基波频率波动对测量精度的影响.更多还原

【Abstract】 The paper deals with the development of harmonic measuring instrument in power system by use of MCU combined with integrated phase lock chip CD4046. The experiment shows that this scheme can expediently implement synchronous harmonic measurement by reasonable combination of hardwares and softwares. The measurement results excel or come up to those from other harmonic measuring equipment based on DSP. And the influence from fundamental wave fluctuation was solved using equal phase sampling in place of equi-time interval sampling.更多还原