Emerging Power Quality Challenges due to Integration of Renewable Energy Sources in AC/DC Microgrids

Renewable energy becomes a key contributor to our modern society, but their integration to power grid poses significant technical challenges. (1) Voltage and frequency fluctuations are caused by non-controllable variability of RES. (2) Harmonics, which are caused due to power electronic devices. This suggested hybrid distribution system consists of solar and wind energy sources that must be linked to the grid at a Point of Common Coupling in order to optimize system performance (PCC). Both solar and wind systems use simple Maximum Power Point Tracking (MPPT) algorithms to achieve maximum power under all-weather situations. To maintain the correct voltage at the DC link, a diode clamped multilevel inverter is used. It is controlled by a fuzzy logic controller (FLC) based on vector control methods. The results show that FLC outperforms traditional PI controllers in terms of enhancing the step response of the de link voltage. The paper consists of existing approaches to improve power quality. Furthermore, even when combined with injected active power from a solar-wind hybrid power system, this control methods potently maintains constant grid voltage and also maintain power factor as unity, independent of climatic conditions.