Optimum Sizing Of Grid Connected Photovoltaic (GCPV) System Under Tropical Condition

Wan Mohd Kamil, Wan Nur Syahirah (2017) Optimum Sizing Of Grid Connected Photovoltaic (GCPV) System Under Tropical Condition. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Initial investment for Photovoltaic system is expensive. Therefore, meticulous planning on the financial investment is needed. Usually, 60% from the total installation PV system cost went to solar panel and around 15% to 20% goes to the inverter. Currently, there are still no written standard or guidelines available yet on the optimum sizing between the solar panel and the inverter. Therefore, this research aims to determine the most optimum sizing ratio between solar panel and the inverter. To do so, an average of one year tilted irradiance and back panel temperature data are collected. Then, the collected data is simulated by PV simulator which is set at different sizing ratio which are 1:0.7, 1:0.8, 1:0.9, 1:1, 1.1.1, 1:1.2. The results show that the most optimum sizing ratio between solar panel and inverter is at 1:0.8. In terms of financial impact, this ratio shows that it saves cost around 4% for each 4kW system and will be greater if the PV system is expanded up to GigaWatts of size. Furthermore, this ratio also has the highest efficiency if compared to other ratios. When compare to 1:1 ratio, 1:0.8 ratio is higher in efficiency at 0.68%. This is due to the finding that at 20% smaller size than the panel, the inverter operated the closes to its full potential under tropical climate condition.

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