Adaptive notch filter based synchronization technique for integration of distributed generation systems to utility grid

This paper presents the adaptive notch filter based synchronization technique used for generation of reference currents for hysteresis current controlled three phase voltage source inverter. These three phase reference current components are then used to control the active power injected by the three phase voltage source inverter. In addition, the proposed control strategy can provide compensation for reactive power demands as well as harmonic load current requirements of the nonlinear loads during interconnection of inverter to the utility grid. Hysteresis current controlled technique is used to control the three phase voltage source inverter. By sensing the actual load currents, an adequate amount of active power, reactive power and harmonic current demanded by nonlinear load will be compensated with fast dynamic response into the utility grid. The effectiveness of the proposed technique is verified with injection of active and reactive power generated by three phase voltage source inverter through MATLAB/Simulink environment. An experimental work is undergoing and can be presented latter.