Abstract
In recent years, voltage and frequency regulation issues have been extensively discussed for the microgrid clusters (MGCs), as the high penetration of renewable energy resources (RES) might affect the continuous operation of the microgrid (MG). Furthermore, to enhance the MGC’s operation reliability, stability concerns need to be addressed. In this study, a residential MGC connected to a commercial MGC has been considered. A novel control scheme that combines both droop control and virtual inertia control is proposed. This control strategy relies on online measurements, and it can be adapted to different situations. At each iteration, the damping coefficient and droop coefficient are calculated this allows the system to switch as needed between the droop and the virtual inertia controller. This dynamic coefficient calculation allows plug and play capability, which provides the MGC with major flexibility in terms of the MGs operation and flexibility.
Highlights
System descriptionA microgrid may satisfy its emergency loads during a blackout
In recent years, voltage and frequency regulation issues have been extensively discussed for the microgrid clusters (MGCs), as the high penetration of renewable energy resources (RES) might affect the continuous operation of the microgrid (MG)
In [7], the authors proposed a virtual synchronous generator (VSG) controller in which the converter dynamical features are considered to demonstrate that the relationship between the damping factor and the virtual inertia should be lesser than the crossover frequency to stabilize the grid
Summary
A microgrid may satisfy its emergency loads during a blackout. To enhance the stability of the defined system and control the voltage and frequency, a MGC with a combined residential and commercial is. Commercial peak load happens during the week, while residential peak load occurs during weekends. By utilizing the difference in power demand between residential and commercial load, excessive power from the commercial MGC may be used to satisfy the residential load. This allows power to flow from the commercial side of the system to the residential side during weekend peak demand hours, and thereby, enhancing the reliability of the system. The virtual inertia control can compensate for the lack of synchronous generators or the main power grid by emulating the virtual inertia using the swing equation
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