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On The Role of Supercapacitors towards Characterization of PV Generators

T. Belel, S. Basu Pal, K. Das (Bhattacharya), D. Mukherjee

A very precise and inexpensive method of I-V characterisation is possible by capacitor charging for a PV generator. Application of transient analysis on the circuit permits determination of characterization times for various capacitor sizes. Following the above trend, authors of this paper uses various sizes of supercapacitor instead of capacitor as load to PV cell and modules. This ensures smother characterization without noise and also accurate control over the characterization time. Based on a piecewise linear break-up of PV characteristic, authors have derived a much more accurate method of characterization time involving the four basic electrical parameters defining a PV curve. Experimental validation indicates excellent agreement with actual curve plotting time.