Percorrer por autor "Leme, Cleno Ravazzi Ribeiro Paes"
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- Evaluation of conservation voltage regulation techniques in microgridsPublication . Leme, Cleno Ravazzi Ribeiro Paes; Ferreira, Ângela P.; Durand, Fábio RenanThis work has the main objective to present an evaluation of the Conservation Voltage Regulation (CVR) technique applied to a small microgrid based on renewable energy sources. Conservation Voltage Regulation (CVR) is based on the premise that reduction of the supplier voltage will lead to reduced energy consumption by final consumers without harming their appliances. CVR implementation is one of the cheapest technologies that can be used to provide better resources utilization, demand reduction and efficiency improvement, being this principle already validatedão when applied in public networks. The actual trend of Distributed Generation based on Renewable Energy Sources in distribution systems also impacts on voltage control and on CVR schemes. By this way, it is important to analyze the impact of CVR in microgrids. Experimental tests have been performed on a demonstration project of a small microgrid of the Polytechnic Institute of Bragança in order to evaluate CVR benefits. Voltage and frequency control strategies involved in this kind of networks are conceptually similar to the ones existing in the public network, but due to intermittency of renewable sources, control dynamics is completely different, with consequences in the application and evaluation of CVR technique. The energy consumption varies with voltage and also with frequency, which do not allow the translation of CVR advantages and evaluation techniques already validated in public networks to small microgrids.