Abstract

Gas turbine generators are commonly used in oil and gas industries due to their robustness and association with other operating systems in the combined cycles. The electrical generators may become unstable under severe load fluctuations. For these raisons, maintaining the stability is paramount to ensure continuous functioninality.This paper deals with the modeling and simulation of a single shaft gas turbine generator using the model developed by Rowen and incorporating different types of controllers, viz a Zeigler- Nichols PID controller, a Fuzzy Logic Controller (FLC), FLC-PID and finally a hybridPID/FLC/FLC-PIDcontroller. The study was undertaken under Matlab / Simulink environment with data related to an in service power plant owned by Sonatrach, Algiers, Algeria. The results show that FLC-PID and hybrid tuned controllers provide the best time domain performances.

Highlights

  • In most refineries, cogeneration is very often used to generate electricity and to provide steam for the processing units

  • The results show that the controller tuned using Fuzzy Logic Controller (FLC)-PID and hybrid Fuzzy-PID/PID are the best in considering the performances of the system

  • 3.4 Hybrid Controller The hybrid controller is combined between three regulators (PID, FLC & Fuzzy Logic-PID Controller (FLC-PID)), a multiport switch is designed to select a regulator according to the absolute error to improve the static and the dynamic performances

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Summary

INTRODUCTION

Cogeneration is very often used to generate electricity and to provide steam for the processing units. Power generation plants, which are usually interconnected with utilities, have very complicated structures with some inherent problems associated with power and voltage oscillations caused by the different connected loads and high power induction motors These problems seriously affect power plant operations and may even lead to a blackout. Rowen has developed a model based on the concept of the transfer function for a heavy duty gas turbine in 1983 [1]. This model was verified by simulation by [2], and subsequently used to study the dynamic analysis of combined cycle plants [3], twin shaft gas turbine plant [4] and even micro gas turbine plants [5]. The results show that the controller tuned using FLC-PID and hybrid Fuzzy-PID/PID are the best in considering the performances of the system

GAS TURBINE MODELLING
CONTROL DESIGN AND ANALYSIS
SIMULATION RESULTS AND ANALYSIS
CONCLUSION
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