Monographies

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Author: search.filters.author.Bentarzi, Hamid

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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
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    Oscillation Detection Using PMU Technology in the North Africa Power System
    (Springer, 2019) Tsebia, Mohammed; Bentarzi, Hamid
    Monitoring of the electrical power system has an importance in itsreliability. In order to ensure the best monitoring, the system of measure andcommunication must be precise and in real time. The integration of PMUtechnology in the electrical power system improves reliability monitoring for thelocal and large area power system. In this paper, we have used PMU technologyin the North African electric power system
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    Graph theory based reliability assessment software program for complex systems
    (Springer Science and Business Media Deutschland GmbH, 2020) Bourezg, Abdrabbi; Bentarzi, Hamid
    Reliability is a conceptual term that means endurance, dependability, andgood performance. However, in system engineering, it is more than a conceptualterm; it can be measured and evaluated. Reliability means the ability of a system toperform the required task under the normal conditions during its age. A complexityin system reliability may be commonly arisen due to the interconnection of variouselements in the form of a network that can be represented by graphs. The graph theoryand computer programs are essential tools for analyzing large and complex systems.This chapter presents how a complexity of system reliability can be reduced throughthe use of computer programs based on a graph theory. The software program hasbeen developed for reliability assessment of complex systems such as aircraft. Itcan handle any statistical distributions. It uses the inclusion-exclusion method forfinding the minimal paths for directed acyclic graph using reliability block diagram(RBD). A system may be considered to operate if there exists a set of functioningcomponents from source to target. So, at least one minimal path must function forthe system operation. The probability of the union of all minimal paths can be usedto find the reliability of the whole system
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    PMU deployment in power system oscillation monitoring
    (Springer, 2016) Recioui, Abdelmadjid; Bentarzi, Hamid; Tsebia, Mohammed
    Oscillatory events at low frequencies are commonly witnessed in interconnected power systems. Phasor Measurement Units (PMU) can provide time-synchronized measurements; it can communicate the synchronized local and inter-area information to remote station. In this paper, we have modeled a PMU, and we have tested it in the 14-bus power system . It proposes a real-time monitoring tool that exploits synchronized phasor measurements from PMUs, which allow real-time analysis of higher-frequency events, filling the lack of such monitoring application in the power systems area
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