Abstract
Industrialization in production is developing rapidly, and a large number of non-linear, impact and volatility loads are increasing in the power system, seriously affecting the power quality of the grid. The analysis and monitoring of power quality parameters can achieve the goal of improving power quality. This paper first introduces the influence of harmonics in power quality, and then deduces the acceleration principle of FFT algorithm for DFT acceleration algorithm. In MATLAB software, the FFT algorithm is used to verify the analog signal. Finally, experimental data shows that accurate harmonic parameters can be obtained by the FFT algorithm.