Improved Fuzzy Control Strategy for Power Quality in Distributed Generation's Single Phase Inverters
IOSR Journal of Electrical and Electronics Engineering
Distributed power generation has got its importance with the day to day increase of power generation from renewable energy sources and from domestic customers with small generation units connected to the grid. Distributed power generation systems mostly use Power electronic converters for the interface with power grid. Here in this paper a single-phase inverter for DG systems requiring power quality features, such as harmonic and reactive power compensation for grid-connected operation are
... operation are discussed. The idea is to integrate the DG unit functions with shunt active power filter capabilities. With this approach, the inverter controls the active power flow from the renewable energy source to the grid and also performs the nonlinear load current harmonic compensation by keeping the grid current almost sinusoidal. The control scheme employs a current reference generator based on sinusoidal signal integrator and instantaneous reactive power (IRP) theory together with a dedicated repetitive current controller. Simulation results obtained with PI and fuzzy controllers demonstrate the feasibility of the proposed solution.