ABSTRACT
Increasing automation in the power sector, extending energy demand, increasing the number of electric vehicles, and the need for green energy sources have made it necessary for us to go with renewable energy sources for fulfilling our needs in an efficient and sustainable way. This all takes us to a distributed generation, i.e., generation of electric power in kW to MW size in the vicinity of load unlike the conventional way of centralized power generation of a size about 100’s of MW. But integration of these renewable energy sources through distributed generation (DG) to a grid system involves several problems related to power quality because of the unpredictable, irregular, and discontinuous nature of renewable energy resources. Power quality now is an important factor for deciding the cost of electricity and it is needed to be up to a standard level to work efficiently sustain the equipment’s lifespan. Thus, it required that generated power from renewable energy sources is well conditioned before it is fed to its users. This paper covers a literature review on emerging power quality (PQ) problems in the grid-integrated DG systems, parameters for good power quality, and a few mitigation techniques to improve power quality with a special focus on the unified power quality conditioner (UPQC) method.
