Optimal control of grid-connected microgrid PV-based source under partially shaded conditions
Loading...
Date
2021-04-13
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Université de M'sila
Abstract
Microgrids are gaining increasing attention globally and becoming increasingly powered by photovoltaic
(PV) systems, thereby requiring high-efficiency control to function as a microgrid distributed generation
unit. Accordingly, this study presents an optimal control of a grid-connected Microgrid PV Source (MPVS)
under partially shaded conditions. The objective is to ensure the MPVSs ability to rapidly and precisely
deliver the amount of power assigned by the supervisory controller. Thus, MPVS must shift rapidly and
smoothly between the maximum and intermediate power point modes. The proposed system is
composed of PV array, grid emulators, and two converters coupled to a common DC bus. The control
strategy of the boost converter is based on the combination of two algorithms: particle swarm optimization
algorithm and the proposed intermediate power point tracker algorithm. The voltage source
inverter is controlled to keep the DC bus voltage constant and inject the power to the grid, in which the
voltage-oriented control technique is applied and combined with the phase-locked loop algorithm for
voltage synchronization. Lastly, all control algorithms are implemented in a DSpace 1104 environment
and largely tested under various partially shaded patterns.
Description
Keywords
Microgrid Distributed generation unit Grid-connected PV system Maximum power point tracking (MPPT) PSO Intermediate power point tracking (IPPT) Partial shading