No abstract

The systems to charge batteries of mobile devices are evolving, nevertheless in off-grid photovoltaic systems the traditional battery charging system is still being used, which presents drawbacks regarding the time it takes for them to complete their charge. The present work implemented a fast charging system using quick charge 3.0 technology to achieve faster and more efficient loading of mobile devices. For this, we experimented with a mobile device charging it with a photovoltaic solar system with quick charge 3.0 technology and a photovoltaic solar system with a conventional charging method of 5V to 2A. The results showed differences of up to 100 minutes in the loading time between one and another technology. Concluding that photovoltaic systems with quick charge 3.0 technology are faster when loading mobile devices.

La generación de energía eléctrica a través de combustibles fósiles contamina el medio ambiente y contribuyen al incremento del efecto invernadero. El uso de energías renovables está cada vez más difundido y es la energía solar fotovoltaica la que presenta mayor crecimiento. La literatura muestra que los sistemas fotovoltaicos conectados a la red (SFCR) son instalados en diversos proyectos, pero a altitudes no mayores de 2500 msnm. Sin embargo, en nuestra región no se tiene un SFCR con inversor-string utilizado con fines de investigación para estudiar el comportamiento de estos sistemas fotovoltaicos en las condiciones geográficas y climatológicos de la ciudad de Juliaca. La presente investigación, diseñó, implementó y analizó económicamente un Micro Sistema Fotovoltaico Conectado a la Red (MSFCR) de 3,2 kWp con inversor string para fines de investigación instalado en el Instituto de Energías Renovables y Eficiencia Energética de la Universidad Nacional de Juliaca en su sede Ayabacas. El MSFCR monofásico cuenta con 12 módulos fotovoltaicos policristalinos de 270 Wp de marca Talesun, un inversor-string de 3 kW de marca Sunny Boy, sistemas de protección en el lado CC y AC, instalado en una estructura metálica diseñada exclusivamente para el montaje del sistema. La producción de energía esperada es 6142,56 kWh/año, considerando todas las pérdidas del sistema con un rendimiento global o Performance Ratio (PR) de 85,55%. Los resultados de los índices económicos muestran que el proyecto es rentable económicamente, el VAN es S/.19985,29 y la TIR es de 16%.

The capture of the solar resource by means of photovoltaic systems to transform it into electricity depends on the solar irradiance during the day and climatic factors, the latter being of great importance. Aiming at evaluating and determining the occurrences of extreme solar irradiance and the Peak Sun Hours (HSP) in varied climatic conditions of the altiplano at 3812 meters above sea level, at the level of Lake Titicaca (Puno-Peru) and its effects on the photovoltaic system. The solar irradiance measurement was performed with two short-circuit photovoltaic modules each, where the Isc short-circuit current was connected to a current transducer to convert it into an analog electrical signal processed and stored every second in a programmable Logic Controller High precision (PLC). The results show the occurrence of extreme solar irradiance exceeding 1000 W / m2 and the solar constant for a few seconds on partially cloudy days, determining that the HSP is above 6 kWh / m2 / d and its effects on the photovoltaic system. Finally, in the Puno Altiplano, over irradiance is caused by the interaction of the clouds around the sun and the transitory presence of rain in short periods of time that affects the electrical protection system of a photovoltaic system.