Abstract
A new topology for solar photovoltaic (PV) energy conversion system is used in this paper. Various topologies are available nowadays which have several problems associated with using several blocks and in its performance analysis of the system from the stability point of view like DC-DC converter, low-frequency transformer, maximum power point tracking [MPPT] block, unfold circuit like push-pull circuit, etc. New types of topology for solar photovoltaic energy conversion systems have been shown which bypass the MPPT separate block units, unfold circuit, low-frequency transformer. By the use of current-controlled inverter integration of MPPT along with the DC-DC to AC conversion takes place inside a single block which reduces the number of blocks helping in getting a simple transformation block for the stability analysis. With the help of Phase Locked Loop (PLL) quadrature axis voltage can set to zero so that only direct axis voltage is used which corresponds to a single PI controller which again reduces one set point type tracking controller. Currents which are injected into the grid contains harmonics, THD generated form inverter is approximately 10% only, which can be further reduced by 5% by using simple suitable LC filter. MATLAB simulation depicts the whole work.
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