Abstract:
The dependency of the energy market on renewable energy sources has grown rapidly over the
past few years, especially photovoltaic systems. Also, microgrid is an area of interest as it can be
used as an effective complementary of power grid. But microgrids face protection, reliability, and
stability issues, so control should be prudent. Voltage-oriented control (VOC) and direct power
control are the common methods for active and reactive power management of grid-connected PV
systems. The main aim of this project is to develop a DC link sensor less control strategy for the
microgrid. The first DC-DC converter stage of the system incorporates adaptive 'perturb and
observe' maximum power point tracking. In the second stage, the DC link sensor less control is
used to control the inverter. The proposed system uses a system loss model to generate the control
signal. In this project, for a typical microgrid-connected PV system, the proposed model is
designed and simulated in MATLAB SIMULINK. And the performance of the system is analysed
and compared with the conventional VOC system. As an outcome, eliminating the DC-link high
voltage sensor enhances the transient response and system stability under loading and reduces
system size and cost
