Optimization of PV system for residential application——effect of carbon tax and electricity buy- back

摘要

In this paper, five cases with various levels of carbon tax and electricity buy - back price for adoption of photovoltaic (PV) system were studied. An evaluation model, constructed in an optimization package LINGO, was employed to analyze the economic aspects of PV adoption. The results can be summarized as follows: 1 ) For a practical project, each case has its optimal PV capacity, considering the minimal annual energy cost and various constraints. 2) The introduction of carbon tax stimulates the adoption of PV system. However,the influence is relatively small. The optimal capacity has an increase of 0.4 kW with the adoption of carbon tax of 10 Yen/kg - C. 3) Electricity buy - back price has a positive influence on PV adoption. With a price of 25 Yen/kWh, the customer prefers to adopt the maximal PV capacity limited to the available site area. However,as the price is reduced to 15 Yen/kWh, the economic attractive investment is between 0 to 1.3 kW.