Cascaded Nonlinear Control for Grid-Connected Single-Phase Inverters Utilizing Learning Compensation and Current Observer

Alqatamin, Moath; McIntyre, Michael L.; Latham, Joseph

doi:10.23919/acc.2019.8814673

Cited by 2 publications

(3 citation statements)

References 11 publications

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“…Based on Assumptions 3 and 4 it can be concluded that N 0 is bounded. From the open-loop error dynamic of η t in (20) and motivated by the subsequent stability analysis, the duty ratio control signal is designed as…”

Section: Control Developmentmentioning

confidence: 99%

“…where K 3 ∈ ℝ + is a positive constant gain selected based on the stability analysis, sgn( ⋅ ) is the standard signum function which is used to compensate for uncertainty N 0 . Finally, by substituting the control signal from (21) into (20), the closed-loop error dynamic for η t can be obtained as…”

Section: Control Developmentmentioning

confidence: 99%

“…The designed controller is applied to improve the power quality of the local load voltage and the grid current at the same time for the three‐phase GC inverter. Moreover, the authors in [20] have designed a Lyapunov‐based cascaded control scheme. The controller includes an inner voltage loop and an outer current loop.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the power quality of single‐phase grid‐connected inverter by filter‐based control scheme

Alqatamin

McIntyre

2020

IET Power Electronics

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In this study, a filter-based control scheme is developed for a single-phase grid-connected inverter system with the local load. Improving the quality of the local load voltage in the grid-connected mode and injecting clean current to the grid at the same time is the main objective of the proposed scheme. Moreover, unity power factor at the grid side for different types of the local load is ensured by the proposed controller. Furthermore, this control approach ensures the seamless transfer between grid-connected and stand-alone operation modes without adjusting the controller structure and without any resynchronisation scheme. The proposed scheme is validated by the Lyapunov stability analysis. Moreover, an experimental testbed has been implemented to further validate the controller in the real-time environment, as well as, the performance is compared to a conventional approach.

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Section: Control Developmentmentioning

confidence: 99%

Section: Control Developmentmentioning

confidence: 99%