Abstract:
Photovoltaic (PV) cells are very costly because of the silicon element which is
not cheaply available. Usually, PV cells are preferred to be used at maximum efficiency.
Therefore, PV plants are emphasized to extract maximum power from PV cells. When inertia
free PV plants are integrated into the grid in large numbers, the problem of maintaining
system stability subjected to load perturbation is quite difficult. In response to this, a control
topology is being an approach to make available the PV cells in maintaining system stability
by utilizing the system frequency deviation as feedback to the controller. To implement this,
the PVs are operated at Maximum Power Point Tracking (MPPT). This allows the PV to
operate at Pseudo Maximum Power Point tracking (PMPPT) which makes it possible to run
the PV with reserve power capacity without employing a battery for storage. The control
strategy has been implemented over a two-stage power conversion model of the PV system.
The simulation results showed that the proposed control PMPPT topology is effective in
frequency regulation capability as compared to the MPPT technique
