Harmonics analysis and suppression technology of wind power system

In addition to reducing energy consumption and mitigating negative environmental impacts, wind power systems are critical for enhancing energy supply efficiency and reliability. However, the harmonic issues introduced by these systems present challenges to the stability and operational efficiency of power systems. Analyzing the interaction characteristics of harmonics and the power grid, establishing a reasonable harmonic source model, and developing new harmonic suppression technology have garnered extensive attention in the industry. This paper introduces the main types of wind turbines, among which the doubly fed fan is the most widely used. Subsequently, it briefly describes the mechanism of harmonic generation in wind power generation systems and explains the adverse effects of harmonics on power systems. The paper then summarizes the current common harmonic source models, including time domain, frequency domain, and data fitting models, and analyzes and compares these models, outlining their respective advantages, disadvantages, and application scopes. Furthermore, the paper reviews the current harmonic suppression technology and research progress in wind power generation systems, encompassing passive filters, active filters, static synchronous compensators, and other solutions. Finally, based on existing harmonic analysis and suppression technologies, the paper identifies the current challenges in harmonic research and application in wind power generation systems and proposes future research directions for harmonic control.