A Single Synchronous Frame Hybrid (SSFH) Multifrequency Controller for Power Active Filters

Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

“…These harmonic currents feed the current controller which should assure steady-state tracking. With this purpose specific harmonic controllers, such as the ones based on resonant filters, should be implemented [32], [48]- [50]. The implementation of parallel current active filtering in the wind turbines power converter have been also proposed as a method to compensate for nonlinear harmonics generation in the WPP [51], [52].…”

Current Control for Dual Three-Phase Permanent Magnet Synchronous Motors Accounting for Current Unbalance and Harmonics

“…To eliminate AC errors in steady state operation, the PR control, which could track sinusoidal signal reference with zero error if the reference signal had a fixed frequency, was introduced in [30][31][32]. The modified PI control with resonant control (PI-R) was used widely in 3-phase grid current control when the grid voltage was unbalanced or not sinusoidal [33][34][35][36][37][38][39][40]. In this paper, the resonant control will be employed to eliminate current unbalance and 5th and 7th current harmonics.…”

An Efficient Control System of Shunt Active Power Filter in Three-Phase Four-Wire Power System

“…Nevertheless, it seems that, as a conclusion, the main point is the need for high-gain current control loops [7][8][9][10][11][12]. Perhaps, the easiest way to obtain them is to use some kind of hysteresis controller [13][14][15]. However, this controller has the disadvantage of a varying switching frequency, which produces a continuous harmonic spectrum.…”