This work is about a developed and implemented power quality digital meter to comply with the new Brazilian standard to regulate the Power Quality in Brazil. The objective of this work has been to develop a low cost device able to monitor the main indices of standard such as the steady state rms voltage, harmonic distortion, fluctuation voltage, unbalance voltage, volt age sags and swells and power supply interruptions in real-time.Through a cellular module the device meter is remotely con trolled and configured. This way, it can send periodically meas urements and information data to a remote server. Other dis cussed point has been the power quality indices of the standard.

This study presents the development and implementation of an alternative Flickermeter based on a low cost embedded electronic system. The development of this new device is based on the original Flickermeter proposed by the IEC 61000-4-15, but with important modifications added. These modifications allow for direct quantification of light variation, in such a way, so as to eliminate the effect associated with the different lamp technologies available through the correct quantification of flicker severity. In order to achieve this objective blocks 1 and 3 of the original IEC Flickermeter were altered and block 2 was completely eliminated. The implementation of a low cost embedded electronic system represents the differential of the developed system in relation to equipment currently available on the market, which is based on solutions of a more elevated cost. The developed prototype was appropriately tested and thus provided encouraging results. In addition, the article also presents an analysis that refers to the susceptibility of lamps manufactured upon the same technologies to flicker, such as compact fluorescent and LED lamps, widely used nowadays for substituting traditional incandescent lamps.

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Resumo -Este artigo apresenta o desenvolvimento de um novo medidor de flicker baseado na análise direta da variação instantânea do fluxo luminoso. A proposta do medidor é baseada no Flickermeter IEC modificado, o que permite medir o flicker produzido por flutuação de tensão em lâmpadas de tecnologias distintas. Isso o torna uma alternativa ao Flickermeter convencional, que não apresenta resultados válidos para ambientes iluminados com lâmpadas não-incandescentes. Um protótipo do equipamento foi desenvolvido e os resultados obtidos são apresentados e analisados. Palavras-Chave

Abstract.This paper discusses the development and implementation of a digital power quality meter to comply with the new standard which will regulate the Power Quality in Brazil. Its main objective has been to become a low cost device capable of monitoring the main Power Quality indices of the new standard, such as the steady state RMS voltage, harmonic distortion, voltage fluctuation, voltage unbalance, voltage sags and swells, as well as power supply interruptions in real-time. Through a cellular GPRS module, the meter can be remotely controlled and configured. In this way, it can exchange measurements and information data with a remote server, thus constituting a Power Quality monitoring system.