Power quality is of great significance for the safety and economic operation of power grids, the production of industrial goods, and daily electricity consumption by the public. The intermittency and randomness nature of renewable energy generation may cause voltage fluctuations and flicker, and the equipment utilizing power electronic devices for renewable power generation will also generate harmonics. Therefore, it is crucial to determine whether the voltage fluctuations, flicker, and harmonics produced by renewable energy power stations comply with national standards through testing and assessment methods.