Research and Design of Data Acquisition and Processing Algorithm Based on Improved FFT

From the aspects of energy saving and emission reduction, data monitoring and analysis, the monitoring requirements of distribution system and equipment are emphatically analyzed, a set of power energy efficiency monitoring terminal which can collect and process various electrical data is put forward, and the core algorithm of data acquisition and processing system of this terminal is studied and designed in this paper. The main contents of this paper include the detailed design of the FFT algorithm for harmonic analysis of devices, and the FFT algorithm using rectangular window, Hanning window, Hamming window, single-peak spectral line interpolation, bimodal spectral line interpolation and other interpolation methods is compared and analyzed, finally, the improved FFT algorithm is proposed. A large number of experiments on the system show that the improved FFT algorithm can effectively improve the calculation accuracy of harmonic analysis when asynchronous sampling, and fully meet the actual needs of the power industry, so the research and design of this paper has a high theoretical reference value and practical value.