Power quality analysis of tidal current energy generation based on HHT transform

When tidal current energy generation is connected to the grid with distributed energy or directly applied to the equipment, it is necessary to detect the power quality of tidal current energy to avoid grid operation failure or damage to precision equipment. In this paper, the principle of tidal current energy generation is introduced, and the problem of power quality is analyzed based on Hilbert Huang transform(HHT). The Hilbert spectrum is obtained by Empirical Mode Decomposition(EMD) and Hilbert transform. The results show that HHT can detect the harmonic and other power quality problems in power system, which is of great significance in the further analysis of quality detection of tidal current energy.