A novel power system harmonic analyzer based on ARM and FPGA

This paper developed a novel power harmonic analyzer system based on ARM and FPGA, aiming at reducing the spectrum leakage caused by fixed-frequency sampling. It focused on the design of system architecture, preprocessing circuit, digital multiplier circuit based on FPGA. The comparison of harmonics analysis by using fixed-frequency and frequency tracking samples show that the latter can reduce spectrum leakage error sharply and has higher precision.