High-power Hybrid Injection Active Power Filter’s Engineering Application

To meet the needs of harmonics suppression in high-power rectification production scene, this paper designs a type of high-power hybrid injection active power filter, analyzes its topology and work principles, and discusses its harmonic suppression capability and dead-zone compensation method. A new sliding-window iterative discrete fourier transformation algorithm is presented for harmonic reference-current’s real-time and effective detection, and a PI-type iterative learning control algorithm is used to improve harmonic current’s tracking precision. The application results prove that the high-power hybrid injection active power filter can effectively fulfil the integrated demands of harmonic suppression and reactive power compensation in high-power load conditions, and has good engineering application effect. For China has few applications of high-power hybrid active power filter till now, the given design method and engineering experience are useful for applications and research of other active power filters.