研究目的
To estimate the performance ratio of grid-connected photovoltaic systems in the Paraná state, in Brazil, for four different photovoltaic technologies, and the annual energy generated.
研究成果
The study concluded that the performance ratio of grid-connected photovoltaic systems varies with temperature and the type of photovoltaic technology. Polycrystalline silicon systems perform better in low temperatures, while cadmium telluride systems excel in high temperatures. The annual energy generated was highest in Curitiba, indicating the need for grid adaptation to accommodate varying energy inputs from photovoltaic systems.
研究不足
The study's limitations include the use of estimated values for various system losses and the reliance on a specific equation for calculating the temperature of the photovoltaic cell, which may not capture all real-world conditions accurately. Additionally, the study did not account for all possible variables affecting photovoltaic system performance.
1：Experimental Design and Method Selection:
The study involved estimating the performance ratio for grid-connected photovoltaic systems using four different technologies across six cities in Paraná. The methodology included calculating temperature losses, inverter losses, and other system losses to estimate the performance ratio and annual energy generated.
2：Sample Selection and Data Sources:
Data from INMET automatic surface stations were used, providing environmental data such as temperature, wind speed, and solar radiation.
3：List of Experimental Equipment and Materials:
Photovoltaic modules of four technologies (polycrystalline silicon, monocrystalline silicon, cadmium telluride, and microcrystalline/amorphous silicon) and inverters of different powers were considered.
4：Experimental Procedures and Operational Workflow:
The temperature of the photovoltaic cell was calculated using a specific equation, and losses were estimated based on temperature, inverter efficiency, and other factors. The performance ratio was then calculated by discounting total losses from the theoretical performance.
5：Data Analysis Methods:
The performance ratio and annual energy generated were calculated using the estimated PR and solar irradiation data.
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