Control strategies to mitigate potential operational challenges in future grids

With the increasing penetration of distributed generation (DG) units into the grids, power system operators are facing technical challenges in both system operation and control. Some of the challenges are increased power quality issues, poor voltage regulation, reduced system inertia, increased rate of change of frequency, ride-through capability, false tripping of protection systems, and network congestions. These issues will affect the DG hosting capacity of the grids as well as customer satisfaction. Further, renewable generation unit (RGU) integration into the grids is being encouraged worldwide to improve the environmental condition. Therefore, it can be anticipated that the future power grid will face unprecedented technical challenges and power quality problems that will strongly impede the further growth of the RGUs. The problems will appear more critical when the RGUs in the grid dominate load sharing with the traditional generation systems. In the context of the problems mentioned above, an accurate assessment of the potential technical capability of the DGs and the development of new strategies to reduce operational challenges is essential so that effective mitigation actions can be planned for future renewable rich power systems, which will enhance the growth of renewable power generation. The main objective of this thesis is to propose a comprehensive mitigation plan to mitigate the grid technical challenges in both the system operation and power quality in future renewable-rich power grids.