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Penentuan Nilai Resistansi Parasitik Internal Modul Photovoltaik (Pv) Menggunakan Fungsi Lambert-W
A study has been conducted to evaluate the internal PV resistivity value of the PV module causing the decrease of analytical output power using the Lambert-W function. The PV modules used are Solarland SLP-12 monocrystal type and Silicon Hooray MCP-2 polycrystalline type which is one of the modules sold in the market with the same output power capacity of 100 Wp. Based on curve model I(V) modeling using Sigma Plot, there are three parameters to calculate the value of parasitic internal resistance (Rs and Rsh) ie short circuit current (Isc), open circuit voltage (Voc) and Maximum power point (MPP). Maximum power obtained by monocrystal and polycrystal modules of 13W and 11.5 W with a cell temperature of 33˚C. The value of parasitic internal resistance (Rs and Rsh) generated using Mathcad in the monocrystal type module is 0.66 Ω and 92.5 Ω, whereas in the polycrystalline type module it is obtained at 1.5 Ω and 107.5 Ω. The parameter values obtained from this model illustrate the internal losses caused by contact between the module cells during its operating life that affect performance. Observation of the value of parasitic internal resistance repeatedly and periodically is necessary so that an improperly altered parasitic value of the internal resistance values (anomalies) that interfere with the performance of the PV module can be anticipated.
Keywords : module PV type monocrystal and polycrystalline, parasitic internal custody, Lambert- W function, performance
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