Abstract
This paper presents integration of solar-wind
hybrid fed DC-grid to distributed AC grid. Generally, the
renewable hybrid energy systems use two or more energy sources
to supply power to the dc grid. In case of insufficient power
generation or excessive load demand, in order to supply power to
DC loads, it must integrate with AC grid. As dc loads increase in
number, complexity increases and tighter voltage regulation is
required. This paper presents dual mode control operation of
inverter which integrates the solar and wind power fed dc bus to
the single phase ac distribution system. The inverter can be
operated in hysteresis current control when power is fed from
DC grid to AC distributed grid and in AC-DC boost rectifier
mode otherwise. The detailed operation of dual mode control of
inverter is described in this paper. The effectiveness of the
proposed system has been verified through simulation studies
using MATLAB/SIMULINK.