Browsing by Author "Talah, Djamila"

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    Ambient Temperature Effect on the Performance of Gas Turbine in the Combined Cycle Power Plant
    (ALJEST, 2021) Talah, Djamila; Bentarzi, H.
    Recently, combined-cycle power plant systems are the most efficient concept used for generating electricity. The advanced closed loop steam cooling system which involves the gas turbine and steam turbine cycles has produced one of the most environmentally adequate existing power generation systems. Gas turbines (GTs) were developed quickly and used in many applications especially in combined cycle power plants, due to their higher efficiency and lower emissions in carbon dioxide (CO2), compared to other categories such as diesel engines. Therefore, increasing attention in the study of heavy-duty gas turbines (HDGT) models has been acquired with diverse amounts of difficulty and merit. Thus, modeling and simulation of the HDGT behavior under accurate operating conditions play a significant role for efficient design as well as reliable manufacturing practice. Thus, the improvements of their efficiency will significantly reduce (CO2) emissions.This paper focuses on the impact of ambient temperature on the gas turbine performance in the combined cycle power plant. The study presents modeling and analysis of the gas turbine behavior based on the frequency dependent model (FD model), using Matlab/Simulink. In our approach, simple time delays are integrated to the FD model, taking into consideration the effectiveness and accuracy of the model. This is achieved by a complementary analysis study, of the temperature effect on the efficiency of the gas turbine (GT), and then the combined cycle power plant.
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    Frequency control system effectiveness in a combined cycle gas turbine plant †
    (MDPI, 2022) Talah, Djamila; Bentarzi, Hamid
    Combined cycle gas turbines (CCGTs) have considerable merits and are mainly the most frequently researched topics in power generation, due to their attractive performance characteristics and low-emission combustion system. A change in power demands throughout a power system is reflected by a change in the frequency in the network. Therefore, a significant loss in a power system without a suitable control system can cause an extreme frequency disturbance in the network. However, it has been observed that many research studies have focused on control issues and voltage stability, contrary to frequency control, which receives less interest in this field. Considering these remarks, our contribution deals with the frequency control system. This study focuses on the effectiveness of the frequency control system in a combined cycle gas turbine plant. Thus, a dynamic model for a CCGT plant has been developed in MATLAB/Simulink, and the power system responses are examined following the frequency deviation
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    Modeling and simulation of an operating gas turbine using modelica language
    (2023) Talah, Djamila; Bentarzi, Hamid; Mangola, Giovanni
    This article uses Modelica to model and simulate the operating Gas Turbine (GT) in a combined cycle power plant in Ras-Djinet, Algeria. The modeling and simulation have been validated based on the data collected from this operating power plant. Details of GT modeling using Modelica language and ThermoPower library have been presented. Furthermore, the simulation results have been discussed in this article. The model has been examined in two different cases: the temperature effect and the reduction in fuel flow at a steady state. Besides, a comparison between the reel and simulation results for a different amount of fuel has been investigated. The accuracy of these simulations is noted and proven by the coherence of the simulation results with the experimental data collected from the power plant company
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    Turbine governor performance improvement in a power generation plant
    (Université M'Hamed Bougara : Institut de génie électrique et électronique, 2022) Talah, Djamila; Bentarzi, Hamid(Directeur de thèse)
    Governing system is an important control system in the power plant, it regulates the turbine speed, power and hence the grid frequency. Steady state and dynamic performance of the power system depends on the power plant response capabilities in which governing system plays a key role. The aim of this project is to enhance this performance by improving the governing system using recent control techniques. Evidently, a simulation model based on the dynamic mathematical and thermodynamic equations will be considered. The performance of the governing system will be evaluated on the basis of the simulation results. A Combined Cycle Power Generation Plant is considered and a simulation model as well as a governing system model is developed and implemented in order to be used for verifying the performance system. The Modelica language is used as development software tool which is an objectoriented equation-based modeling language that allows for very detailed and consistent representation of system dynamics. Real data collected from the Combined Cycle Power Plant of Ras_Djinet, is exploited in the simulation. The simulation is dealt in Modelica language, and the simulation results are compared to the real data and discussed