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The increasing trend in integrating renewable energy sources into microgrids presents challenges from the viewpoints of reliable operation and control. Paper gives outline of droop based current sharing issues of parallel DC-DC converters in standalone photovoltaic system. This paper also presents simulation of incremental conductance maximum power point tracking (MPPT) used in solar array power systems. The main drawbacks of parallel converters are poor current sharing and voltage drop. The paper describes about instantaneous droop calculation using droop index to improve the power sharing performance. The control technique is simulated using MATLAB/SIMULINK in PV system with MPPT and case study has been done with different condition.

The rising rate of consumption and price of fossil fuel along with environmental pollution by conventional power generation draw global attention to renewable energy sources and technology. Paper gives analysis study on current sharing issues of parallel DC converters in standalone photovoltaic (PV) WIND system. Solar wind power generating system with maximum power point tracking (MPPT) techniqueincremental conductance method is used for the simulation analysis. The main drawbacks of parallel converters used in system are poor power sharing and voltage drop. The paper describes about instantaneous droop calculation considering effect of cable resistance using droop index to improve the power sharing performance. The control technique is simulated using MATLAB/SIMULINK in PV-wind power generating system with MPPT and case study has been done on the control strategy and verifies the effectiveness of adaptive droop control on output converter voltage.

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