Power-Sharing Enhancement Using Harmonized Membership Fuzzy Logic Droop Control Based Micro-Grid

Abstract

The contribution of Renewable Energy Resources (RER) in the process of power generation is significantly high in the recent days since it paves the way for overcoming the issues like serious energy crisis and natural contamination. This paper deals with the renewable energy based micro-grid as it is regarded as the apt solution for integrating the RER with the electrical frameworks. As the fixed droop coefficients in conventional droop control approaches have caused various limitations like low power-sharing and sudden drops of grid voltage in the Direct Current (DC) side, the Harmonized Membership Fuzzy Logic (MFL) droop control is employed in this present study. This proposed droop control for the hybrid PV-wind-battery system with MFL assists in achieving proper power-sharing and minimizing Total Harmonic Distortion (THD) in the emergency micro-grid. It eradicates the deviations in voltage and frequency with its flexible and robust operation. The THD is reduced and attains the value of 3.1% compared to the traditional droop control. The simulation results of harmonized MFL droop control are analogized with the conventional approaches to validate the performance of the proposed method. In addition, the experimental results provided by the Field Programmable Gate Array (FPGA) based laboratory setup built using a solar photovoltaic (PV) and wind Permanent Magnet Synchronous Generator (PMSG) reaffirms the design.