Monografia (especialização)
Estudos e medições da eficiência de inversores de pequeno e médio porte para aplicação em sistemas fotovoltaicos
Fecha
2019-12-04Autor
Ramon Albino de Oliveira
Institución
Resumen
The recent increasing number of renewable energy sources connected to the national electrical
system have increased the number of installed power converters in the country. Photovoltaic
and wind power generation companies have been consulting Engineering firms in order to
verify the efficiency of converters installed on field which have already started their
operation. In this study were analyzed the main international standards that provide the
procedures for measuring conversion efficiency in many different countries. Also, a real
system with a small converter has been verified. There has been collected data from a 12 kW
inverter in a commercial central power generation, being the power input and output metered
by a portable power meter dedicated to efficiency analysis and by the monitoring SCADA
system available in the plant. The obtained data were processed and compared between the
measurement systems and the data provided by the manufacturers in equipment catalog. The
result achieved were compliant with the manufacturer data. However, it has been observed
that small deviation on the input and output converter variables may introduce significantly
changes in the efficiency calculation, justifying a deeper study of these systems.