Micro-grid Concept for Coordinated Control of Renewable Energy Power Plants and a Way to Integrate with Main Grid

Even though research papers discussed increasing fossil fuel costs, it is proven in today's scenario. Therefore, it is confirmed that Renewable Energy (RE) technologies will take a primary role in generating electricity in this era. This has created real operational challenges for the grid operators. With technology transfer and new technology development, capacity building is potentially focused on through grants. The power system was preferred to have large inertia for its smooth operations. With the latest technologies and speedy responses, the modernized systems could create inertia by properly and instantly coordinating and controlling many small plants. Further, accurate prediction algorithms release stress by giving advanced information about the system. It is a new direction of modernized control, and it always starts with a small design. It then integrates with an extensive system through a supervisory control loop. These incorporated technologies are opening several new opportunities for RE-based technologies. The research on micro-grid was initiated about two decades ago. It has been developed parallel with the possible development of RE technologies and prediction algorithms. The recent hike in fossil fuel costs pushes the micro-grid-based RE power generation to the front. Accordingly, this paper presents the coordinated control of a few RE power plants, using a micro-grid concept while integrating the micro-grid with the primary grid through the supervisory control concept. The proposed idea is simulated using the EMTDC/PSCAD, and it shows an excellent result. Furthermore, it will become more attractive over expensive fossil fuel systems in this era.