A Third Harmonic Injected PWM Scheme with Partial Feedback Linearizing Controller for Grid-Connected Ultracapacitor System

Decoupled PI current controller for grid‐tied inverters with improved transient performances

“…The results presented in the abovementioned papers have demonstrated better transient performances of the FBL technique in comparison with the conventional approaches. Compared to [27][28][29], the objective of this work is different in the sense that it explores the nominal performance recovery property of the composite controller, consisting of FBL and DOBC, while [27][28][29] only deal with the stabilisation problem of the closed-loop system under FBL technique. Indeed, the feedback-linearising controller is derived based on the nominal system, and the DOBC is simply a reduced-order high-gain observer for disturbance estimation.…”

“…The PI controller has been employed as a linear controller to guarantee asymptotic stabilisation of the DC‐link voltage and the reactive power even in the presence of model uncertainties. Recently, FBL technique has been applied for operating three‐phase grid‐tied proton exchange membrane fuel‐cell [29]. Mohiuddin et al in [29] have considered the combination of partial FBL method with a PI controller to achieve accurate regulation of active and reactive powers.…”

“…Recently, FBL technique has been applied for operating three‐phase grid‐tied proton exchange membrane fuel‐cell [29]. Mohiuddin et al in [29] have considered the combination of partial FBL method with a PI controller to achieve accurate regulation of active and reactive powers. In that work, third‐harmonic injection method (THIM) has been considered as a modulating technique to generate the three‐phase voltage references.…”