Abstract
Microgrids (MGs) are the emergent solution to overcome the current electricity demand. The MGs provide the facility to operate in both isolated and grid-connected modes. For both operating modes, Distributed Generation (DG) inverters are operating under grid forming or grid following control modes. During mode switching, the MG experiences enormous fluctuations, which occur due to the unidirectional islanding event. This paper presents a control strategy by using the modified power control scheme, current controller, and DC linked voltage controller scheme to ensure the operational mode transfer smoothly from the grid-connected to the islanded mode and vice versa. The proposed control scheme is applied to a three-phase distributed energy resource-based MG system with fixed loads. The simulation results validate the effectiveness of the control technique while tested at the point of common coupling and also at the time of mode transfer.
Highlights
Microgrids (MGs) provide a promising solution to overcome the electricity shortage in a reliable way
Distributed Generation (DG) like solar, wind, and Combined Heat Power (CHP), that are attached to Grid Connected Mode (GCM) or Islanded Mode (IM) protocols with connecting loads have many advantages over the traditional grid [1,2]
The MGs provide an alternative with bidirectional communication, there are some control issues, regarding power, voltage, and frequency deviations that may occur when the MG changes its operational mode from GCM to IM [3,4]
Summary
Microgrids (MGs) provide a promising solution to overcome the electricity shortage in a reliable way. The MGs provide an alternative with bidirectional communication, there are some control issues, regarding power, voltage, and frequency deviations that may occur when the MG changes its operational mode from GCM to IM [3,4]. To get an effective MG operation during mode switching, a fast seamless transient control technique should be implemented which will not compromise the permissible standards in terms of power sharing accuracy, voltage, and frequency. This paper presents a control strategy that uses a modified power control scheme, consisting of the current controller and a DC linked voltage controller scheme to ensure the operational mode transfer smoothly from GCM to IM transitions and vice versa. The simulation results validate the effectiveness of the control technique in terms of voltage, frequency, and power sharing behavior at the Point of Common Coupling (PCC) and at the time of mode transfer
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
