电网信号测量中非同步采样误差的分析与处理

在电网信号实时测量分析中 ,信号频率往往是在变化的 ,很难实现严格的同步采样 ,从而带来了非同步采样误差 ,文章从时域和频域两个角度分析了非同步误差产生的原因 ,建立了误差模型 ,并且从软、硬两个方面综合分析了各种预防、补偿措施的优缺点 ,可以从实时性、精度等不同的角度实现非同步测量误差的最小化 ,提高了信号处理的精确度和测量参数的可信度

Analysis and Processing of Non-synchronous Sampling Errors in Measurement of Electric Power Signal

It is difficult to exactly realize the synchronous sampling in the on\|line analysis and measurement of electric power signal. The non\|synchronous sampling errors would influence the accuracy of data largely, especially for some high\|frequency components. The reasons of occurring the non\|synchronous sampling errors are analysed in time\|domain and frequency\|domain and the error model is established in the paper. The advantages and disadvantages of different measures are described with the software and hardware. Thus, the non\|synchronous sampling errors can be minimized and the accuracy of the signal processing and the creditable degree of the measurement parameters.