Abstract
Distributed generations (DG) are one of the upcoming technologies recently used by many electric utilities in all corners of the world. Most of those DG form the microgrid (MG) to serve local loads and can be connected to the grid. This DG’s technology is enabled by utilizing renewable energy sources (REs) that are ecofriendly; however, these REs are intermittent by their nature, so controlling a power electronic device interfaced with them to be connected to the grid is another challenge. Many researchers have worked on the inverters’ control in MG. This study also elaborates on the control strategy for inverters adapted to REs for proper control of voltage and frequency used in an islanded microgrid. The study proposes a hybrid control strategy made of the virtual impedance droop control with arctan function and model predictive control. Extensive simulations have been carried out to validate the proposed control strategy’s effectiveness in terms of rapid transient response and stabilization of voltage, frequency, and power equitability among the microsources in the islanded microgrid.
Highlights
Distributed generations (DG) are seen as alternative solutions to combat pollution and to meet the growing demand for electricity in recent years [1]
Power electronics converters are the most critical item for any power conditioning process used in a microgrid to satisfy various sources/loads. erefore, either a single microsource or parallel microsource is very critical for optimizing their operation
Is study introduces a new control method combining the arctan virtual impedance droop control strategy for primary voltage and frequency control and power sharing issues, and FCS-model predictive control (MPC) strategy is used for tracking the reference voltage
Summary
Distributed generations (DG) are seen as alternative solutions to combat pollution and to meet the growing demand for electricity in recent years [1]. Babqi and Etemadi [7] used MPC as a primary control and conventional droop control as a secondary control; both were used to regulate the output voltage and frequency of each DG-based VSI in an autonomous microgrid. Bouzid et al [10] proposed the new control method for stable current distribution applied to parallel microgrid inverters systems, based on a decoupled trigonometric saturation regulator (DTS). Detailed switches’ designs are used instead of standard versions for paralleled VSIs connected to the grid; the method used droop control and virtual impedance for voltage, frequency control, and adequate power sharing. Is study introduces a new control method combining the arctan virtual impedance droop control strategy for primary voltage and frequency control and power sharing issues, and FCS-MPC strategy is used for tracking the reference voltage.
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