This paper presents a comparative study on the conventional MPPT techniques used in the solar photovoltaic system. These techniques have been implemented in a hardware environment and their performance has been studied for variations in environmental conditions. It can be observed from analysing of PV array that, the P-V & I-V characteristics are highly influenced by the environmental factors leading to low conversion efficiency. Thus, the significance of maximum power point tracking controller is very high. The analysis and comparison of various existing technique has to perform to aid in selecting the appropriate method for implementation hardware results are being analysed to examine the feasibility, cost and efficiency obtained for the existing techniques. The MPPT technique included for study are perturb & observer algorithm (P&O), incremental conductance algorithm (INC), constant voltage method (CVM) the simulation studies were carried out in the MATLAB/Simulink environment. The DSPIC30F4011 has been used to implement the MPPT control.
This paper discusses a harmonic reduction technique implementation for both 1-ᶲ and 3-ᶲ PV fed system .PV system have become very prominent now a days for both standalone and grid connected system. When PV is used for AC loads an inverter is used for conversion of DC-AC. The major drawback found among inverter is the harmful effect of harmonics. The major harmonics present are 3rd harmonic and 5th harmonic. Instead of using multilevel inverter or any complex technique, the method of selective harmonic elimination helps eliminate a particular harmonic whose effect is more without any mundane formulation. The selective harmonics elimination technique is analyzed for 1-ᶲand 3-ᶲ inverters their results are plotted in MATLAB/Simulink environment.
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