Performance evaluation of single ended primary inductance converter for photo voltaic applications

Abstract

This paper aims at the discussion of the performance parameters evaluation of Non isolated Single Ended Primary Inductance DC-DC Converter over Buck Boost and Cuk type converter, whose primary role in photovoltaic power generation is to maintain the output voltage constant irrespective of changes in the input, with improved efficiency and less input current ripple. The paper includes dynamic modeling and simulation of a photovoltaic cell under varying insolation and changes in temperature along with the modeling of the three topologies mentioned above taking the unregulated voltage from the pv cell and their performance parameters are being compared to choose the better converter topology for solar power generation system. For modeling the pv cell the single diode equivalent diagram is considered simulated using MATLAB / Simulink platform to obtain PV and IV curves of solar cell with variable temperature and variable irradiance. Also the dc-dc converters are modeled in MATLAB, and the simulation results are compared.

Performance comparison of Buck-boost family converters for driving led lamps

“…11 it is clear that the Buck-boost converter needs huge input and output capacitors C PV and C 2 in order to keep the PV panel output and the LED lamp voltage under the same limits in relation to the one obtained for converter. The SEPIC input characteristic [10] is similar to the converter, but its output characteristic is like the Buck-boost converter, and, as such, needs a larger output capacitor C 2 . These similarities can be infered from the values shown on Table V.…”

Varying percentages of full uniform shading of a PV module in a controlled environment yields linear power reduction

“…Essentially, circuits that contain semiconductor devices are non-linear, most obviously for devices such as diodes and siliconcontrolled rectifiers where the IV characteristics change abruptly [40]. The characteristics of PV cells are therefore non-linear, depending to a large degree on environmental parameters like temperature, solar irradiation, shading, humidity and pressure [41]. It may, therefore, be hypothesised that the relationship between the incoming light intensity and the output power of a PV module is non-linear.…”