Browsing by Author "Tsebia, Mohammed"

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Analysis of small signal in North Africa Inter-Area Power System
(IEEE, 2019) Tsebia, Mohammed; Bentarzi, Hamid
The problem of oscillations in the interconnected power system is a subject of study in several regions. As the widening of the interconnected North Africa power system makes the grid very sensitive to low frequency oscillations, the presence of these oscillations can cause significant damage to the interconnection lines. The development of synchrophasor technology makes the system of measuring grid parameters more accurate with real-time synchronization. In this paper we used the PMU (Phasor Measurement Unit) for oscillations detection and signal analysis
Improve monitoring system of interconnected oscillation power system based on PMU technology
(IEEE, 2020) Tsebia, Mohammed; Betarzi, Hamid
Interconnected power systems have a very important role between several countries, the conditions of interconnections are strict in order to ensure the good quality of energy transmitted or received. The majority of the technologies that have been installed for system monitoring are based on the SCADA system, the latter does not give good results in real time and the error deviation is significant. This paper proposes a solution for the supervision problem based on the SCADA system; by using PMU technology to measure multiple parameters both with better accuracy and in real time. To validate the proposed approach, the developed PMU based monitoring system is implemented using Simulink/Matlab. Then, its performance is tested by the power system Simulink model under different operating conditions
Inter-area oscillation minimization in power system
(Université M'Hamed Bougara : Institut de génie électrique et électronique, 2023) Tsebia, Mohammed; Bentarzi, Hamid(Directeur de thèse)
Inter-area oscillations result from system events coupled with a poorly damped electric power system. These oscillations are observed in large power systems, encompassing groups of generators or generating plants connected by relatively weak tie lines. The low-frequency modes (0.1 to 0.8 Hz) often involve groups of generators or generating plants on one side of the tie oscillating against groups of generators on the other side of the tie bus. These oscillations are undesirable as they lead to suboptimal power flows, inefficient grid operation, and, consequently, grid instability. Mitigating these oscillations is of vital concern. To address inter-area oscillations, equipment such as Static Var Compensators (SVCs) and various Flexible AC Transmission System (FACTS) devices are increasingly employed. The feasibility of these techniques has been made possible by recent advancements in power electronic technology. The involvement of SVCs and FACTS devices in the transmission network is referred to as Variable Series Compensation (VSC). In addition to FACTS devices, the application of Superconducting Magnetic Energy Storage (SMES) to enhance inter-area oscillation damping has been reported. Although Power System Stabilizers (PSS) are present in many generators, their effect is limited to the local area and does not effectively damp out inter-area oscillations. In this research work, it has been demonstrated that inter-area oscillations can be detected using phasor measurement units (PMUs) installed in the power system. In a typical implementation, one or more generators in a system are selected as Remote Feedback Controllers (RFCs). These RFCs receive synchronized phasor measurements from one or more remote phasor measurement units. Analyzing the phase angles provided from multiple sites enables the detection of inter-area oscillations. If an oscillation is detected, a control signal is sent to the generator's voltage regulator, effectively modulating the voltage and damping out the oscillation
Inter-Area oscillation monitoring in maghrebian power grid using phasor measurement unit
(2017) Tsebia, Mohammed; Bentarzi, Hamid
In the inter-connected power systems, a phenomenon called inter-area oscillation may be caused by several defects. In this paper, a study of the Maghreb countries inter-area power networks oscillation has been investigated. The inter-area oscillation monitoring can be enhanced by integrating Phasor Measurement Unit (PMU) technology installed in different places. The data provided by PMU and recorded by PDC will be used for the monitoring, analysis, and control purposes. The proposed approach has been validated by simulation using MATLAB/Simulink
Monitoring of isolated standalone renewable energy systems
(2020) Tsebia, Mohammed; 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
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
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
Reduction in the use of fossil fuels by improving the interconnection power system oscillation
(Institute of Advanced Engineering and Science, 2023) Tsebia, Mohammed; Bentarzi, Hamid
Many international organizations have called for reducing usage of renewable energy as a means to reduce carbon dioxide emissions, this paper studies the case of electricity production based to fossil fuels. Currently existing solutions is to shift from fossil fuels to clean renewable energy. Electrical interconnections are used between large-scale areas; these interconnections have a major problem that is the phenomenon of oscillations. The amount of fossil energy used by power plants depends on the electrical load required. with these conditions it is not possible to reduce the amount of energy required to satisfy the electrical load required. The solution proposed in this paper is the improvement of interarea oscillation using phasor measurement unit technology for real-time monitoring and accuracy of measurements. We tested the proposed solution for the north African power system. The results show the importance of improving interconnection networks to reduce fossil fuels use
Sub-Synchronous torsional interaction study and mitigation using a synchro-phasors measurement Unit †
(MDPI, 2022) Tsebia, Mohammed; Bentarzi, Hamid
In a power plant, sub-synchronous resonance is not encountered very often, but when it occurs, it can cause a very serious problem and severe damage. Many efforts have been investigated to study and hence mitigate a resonance produced between electrical synchronous machines and the electrical grid that may arise for frequencies other than the fundamental one (50 Hz). Natural resonances in the electrical grid incorporating series capacitors can appear for sub-synchronous frequencies and can be both a series and parallel resonance nature. Mitigation techniques are required for a power plant with an extensive turbine-generator string located near a long power transmission line with series capacitors. Due to the severe consequences, power plants that risk sub-synchronous resonance (SSR) may be equipped with appropriate protection. However, if the sub-synchronous resonance frequencies of the network coincide with any of the mechanical frequencies of the turbine-generator shaft, torsional interaction that is called sub-synchronous torsional interaction (SSTI). If the electrical damping for a specific frequency in the network is insufficient or negative in comparison to mechanical damping, it may lead to this sub-synchronous torsional interaction. This phenomenon can be hazardous causing fatigue in the turbine-generator shaft, which results in the failure of the power generation unit. It can also occur due to the interaction between a control system of converters and the turbine generators. In this research paper, a study using different methods of analysis developed by transmission system operators (TSOs) and the manufacturers with one case study is presented. Additionally, different mitigation techniques, such as filtering and damping, are suggested. Furthermore, a demonstration for measuring principles as well as monitoring and protection against SSTI using a synchro-phasors measurement unit has been presented