Abstract
A mathematical representation of a photovoltaic (PV) solar cell and module performances is demonstrated in this paper. One diode based on the Shockley diode equation model is adopted for simulation and extract the performance indications. The simulated solar module is a particular 235W solar module operating in an existing 806.52 kWp grid connected photovoltaic power plant located at Assa, southern Morocco. The model demonstrates power-voltage (P-V) and current-voltage (I-V) characteristic curves with weather conditions changes. These external conditions include temperature and solar irradiance level (represented by sun unit 1sun=1000w/m2) which greatly affect the performance of the PV system. This paper also presents PV simulation with a maximum power point tracking (MPPT) converter and the general model was implemented in Matlab/Simulink software and used as an example verifying the performance of the tested module under Assa city weather variable.
Highlights
The environmental pollution problems based on classic energy forms cause the planet to be hostile due to the climate changes and other geo and hydro contaminations
It is used as an interface to convert a low input voltage into a high output voltage, in PV systems it is used to track Maximum Power Point (MPP) in the P-V curves of the PV modules regardless of the temperature and irradiance differences
The duty cycle is the output of the maximum power point tracking (MPPT) control system and it is compared with a repeating sequence to produce a PWM
Summary
The environmental pollution problems based on classic energy forms cause the planet to be hostile due to the climate changes and other geo and hydro contaminations. In today's world, there is a need to focus on renewable energy sources to decrease the dependence on fossil fuels resources, and reduce the emission of greenhouse gases. Photovoltaic is one of the most used technologies to convert solar energy into electricity. In the dark the I-V output of a solar cell has an exponential characteristic similar to that of a diode, when exposed to light, photons with energy greater than the bandgap energy of the semiconductor are absorbed and create an electron-hole pair. These carriers are swept apart under the influence of the internal electric fields of the p-n junction and . The PV generator is interfaced with a MPPT boost converter to evaluate the behaviour of all the system
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