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Author: search.filters.author.Bentarzi, HamidHas files: No

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    PMU Phasor Estimation Using Different Techniques
    (IGI Global, 2021) Bentarzi, Hamid; Ouadi, Abderrahmane
    Many models of phasor measurement units (PMU) have been implemented; however, few dynamic models have been developed when the power system parameters change. It is necessary to use a method that can somehow estimate the frequency and correct the phasors. The conventional way to determine frequency is to detect zero crossings per unit time. However, this method has many drawbacks such as high cost and low accuracy. Also, after the frequency determination, the phasor should be corrected by suitably modifying the algorithm without omitting any data. This chapter presents different estimation techniques such as discrete Fourier transform (DFT), smart discrete Fourier transform (SDFT) that may be used to estimate the phasors. These estimated values would be incorrect if the input signals are at an off-nominal frequency and the phase angles would drift away from the true values. To correct this issue, first of all, the off-nominal frequency has been estimated using different techniques such as least error squares and phasor measurement angle changing, and then it is used to correct the phasors
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    Monitoring of Isolated Standalone Renewable Energy Systems
    (Springer link, 2021) Tsebia, M.; Bentarzi, Hamid
    For many areas, powering their homes or small businesses using a small renewable energy system that is not connected to the electricity grid. The monitoring system is essential for isolated areas; with existing monitoring systems the cost of returning is very expensive and difficult to install. In this work we have proposed a monitoring technique based on PMU technology this technology allows to measure the parameters important for the monitoring and send them by a communication system based on the GSP to PDC platform, and using isolated standalone renewable energy systems for reduce oscillations of interconnection power system. To validate the proposed approach, the developed PMU based monitoring system is implemented using Simulink/Matlab. Then, its performance is tested by power system Simulink model under different operating conditions