Real time power quality monitoring system according to new Brazilian regulation policies

Abstract

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.

Implementation of a light Flickermeter in a low cost embedded system

“…Instantaneous flicker is sampled at a rate of 240 samples/s, in accordance with an OFL implementation [23].…”

“…The chosen option offers low cost, besides the appropriate processing capacitypart of the hardware is common to digital signal processors. The internal analog-to-digital converter (ADC) was used, operating under a resolution of 12 bits and a sample rate of 2400 Hz (from implementation of Flickermeters [22,23]). The block diagram in Fig.…”

“…Block D is similar to block 5 of the OFL, which analyses the values and occurrences of instantaneous flicker to quantify its severity. Instantaneous flicker is sampled at a rate of 240 samples/s, in accordance with an OFL implementation [23].…”

Desenvolvimento E Implementação De Um Aparelho Medidor De Flicker Por Medição Direta Da Variação Luminosa

“…A norma define as características gerais do medidor, deixando liberdade na implementação para os desenvolvedores. O que pode implicar em medidores distintos e válidos produzindo resultados divergentes em uma mesma medição [7]- [10].…”