New Control strategy of Single-Phase Micro grid System Using Renewable Energy Based Generation

This paper presents an adaptive sliding mode control (ASMC) of an improved power quality standalone single phase micro grid system. The proposed micro grid system integrates a governor-less micro-hydro turbine driven single phase two winding self-excited induction generator (SEIG) with a wind driven permanent magnet brushless DC (PMBLDC) generator, solar photo-voltaic (PV) array and a battery energy storage system (BESS). These renewable energy sources are integrated using only one single-phase voltage source converter (VSC). The ASMC based control algorithm is used to estimate the reference source current which controls the single-phase VSC and regulates the voltage and frequency of the micro grid in addition to harmonics current mitigation. The sliding mode control is used to estimate the reference real power of the system to maintain the energy balance among wind, micro-hydro, solar PV power and BESS, which controls the frequency of standalone micro grid. Proposed micro grid shows that the grid voltage and frequency are maintained constant while the system is following a sudden change in loads and under intermittent penetration of wind and solar energy sources. Harmonics are mitigated with fuzzy logic controller in this paper. Results are verify trough MATLAB/SIMULINK environment.