Optimization of Controllers for Gas Turbine Based on Probabilistic Robustness

2009 ◽  
Vol 131 (5) ◽  
Author(s):  
Chuanfeng Wang ◽  
Donghai Li ◽  
Zheng Li ◽  
Xuezhi Jiang
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Controller Design ◽  
Dynamic Performance ◽  
Optimization Method ◽  
Monte Carlo Experiment ◽  
Performance Requirements ◽  
System Robustness ◽  
Manufacturing Tolerances ◽  
Probabilistic Robustness

An optimization method for controller parameters of a gas turbine based on probabilistic robustness was described in this paper. As is well known, gas turbines, like many other plants, are stochastic. The parameters of a plant model are often of some uncertainties because of errors in measurements, manufacturing tolerances and so on. According to model uncertainties, the probability of satisfaction for dynamic performance requirements was computed as the objective function of a genetic algorithm, which was used to optimize the parameters of controllers. A Monte Carlo experiment was applied to test the control system robustness. The advantage of the method is that the entire uncertainty parameter space can be considered for the controller design; the systems could satisfy the design requirements in maximal probability. Simulation results showed the effectiveness of the presented method in improving the robustness of the control systems for gas turbines.

Decentralized PID Controllers Based on Probabilistic Robustness

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Chuanfeng Wang ◽  
Donghai Li
Keyword(s):  
Design Method ◽  
Dynamic Performance ◽  
Pid Controllers ◽  
Tuning Method ◽  
Performance Requirements ◽  
Monte Carlo Experiments ◽  
Standard Design ◽  
System Robustness ◽  
The Cost ◽  
Probabilistic Robustness

A tuning method for decentralized PID controllers was developed based on probabilistic robustness for multi-input-multi-output plants, whose parameters vary in a determinate area. The advantage of this method is that the entire uncertainty parameter space can be considered for controller designing. According to model uncertainties, the probabilities of satisfaction for every item of dynamic performance requirements were computed and synthesized as the cost function of genetic algorithms, which was used to optimize the parameters of decentralized PID controllers. Monte Carlo experiments were used to test the control system robustness. Simulations for five multivariable chemical processes were carried out. Comparisons with a standard design method based on nominal conditions indicate that the method presented in this paper has better robustness, and the systems can satisfy the design requirements in a maximal probability.

An Introduction to the Ansaldo GT36 Constant Pressure Sequential Combustor

2017 ◽  
Author(s):  
Douglas A. Pennell ◽  
Mirko R. Bothien ◽  
Andrea Ciani ◽  
Victor Granet ◽  
Ghislain Singla ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Constant Pressure ◽  
Energy Market ◽  
Combustion System ◽  
Turbine Engine ◽  
Beneficial Effects ◽  
Fuel Flexibility ◽  
Temperature Ranges ◽  
System Robustness

This paper introduces and presents validation of the Constant Pressure Sequential Combustion system (denoted CPSC), a second generation concept developed for and applied to the new Ansaldo GT36 H-class gas turbine combustors. It has evolved from the well-established sequential burner technology applied to all current GT26 and GT24 gas turbines, and contains all architectural improvements implemented since original inception of this engine frame in 1994, with beneficial effects on the operation turndown, fuel flexibility, on the overall system robustness, and featuring the required aspects to stay competitive in the present day energy market. The applied air and fuel management therefore facilitate emission and dynamics control at both the extremely high and low firing temperature ranges required for existing and future Ansaldo gas turbine engine classes.

scholarly journals Simulation of a Steam Injected Gas Turbine Plant Control System

1997 ◽  
Author(s):  
Shusheng Zang ◽  
Jaqiang Pan
Keyword(s):  
Gas Turbine ◽  
Flow Rate ◽  
Controller Design ◽  
Dynamic Performance ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Turbine Plant ◽  
Fuel Flow ◽  
Lqr Controller ◽  
Gas Turbine Plant

The design of a modern Linear Quadratic Regulator (LQR) is described for a test steam injected gas turbine (STIG) unit. The LQR controller is obtained by using the fuel flow rate and the injected steam flow rate as the output parameters. To meet the goal of the shaft speed control, a classical Proportional Differential (PD) controller is compared to the LQR controller design. The control performance of the dynamic response of the STIG plant in the case of rejection of load is evaluated. The results of the computer simulation show a remarkable improvement on the dynamic performance of the STIG unit.

Novel robust controller design for load sway reduction in double-pendulum overhead cranes

2018 ◽  
Vol 233 (12) ◽  
pp. 4359-4371 ◽  
Author(s):  
Huimin Ouyang ◽  
Xin Deng ◽  
Huan Xi ◽  
Jinxin Hu ◽  
Guangming Zhang ◽  
...  
Keyword(s):  
Controller Design ◽  
Dynamic Performance ◽  
Optimization Method ◽  
Linear Matrix ◽  
Double Pendulum ◽  
Control Performance ◽  
Mass Property ◽  
Length Changes ◽  
The Stability ◽  
Dynamic Performance Analysis

It is seen that when the hook mass is larger than the load mass or the load has distributed mass property, the load sway of the crane system presents as double-pendulum effect. In this situation, crane system has two different natural frequencies so that the sway characteristic becomes more complex and greatly increases the difficulty of the dynamic performance analysis and controller design. Moreover, the rope length changes significantly affect the stability and control performance of the crane system. In order to solve the aforementioned problems, the linear dynamics of a two-dimensional overhead crane with double-pendulum effect is derived based on a disturbance observer, and is decoupled for controller design by modal analysis. Next, a state feedback controller is presented to achieve robust control performance for a given range of rope length changes. The controller gains are obtained via linear matrix inequality optimization method. Finally, numerical simulations and experimental results validate that the proposed method has superior control performance.

scholarly journals Extending Use of Marine Gas Turbines Through Application of the LM2500+

1998 ◽  
Author(s):  
David L. Luck
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Physical Parameters ◽  
Performance Requirements ◽  
Power Capability ◽  
Extended Power

The propulsion configurations of current gas turbine powered military and commercial vessels have been established based upon available power ratings of existing engines, relative to the performance requirements of ship builders and operators. Development of the LM2500+ engine has extended power capability with minimal changes to the physical parameters of the current LM2500 marine packages. This paper explores the extended possibilities of gas turbine based propulsion in both military and commercial vessels through application of increased gas turbine power in packages of essentially current size and weight such as the LM2500+.

scholarly journals Thermomechanical Advances for Small Gas Turbine Engines: Present Capabilities and Future Direction in Gas Generator Designs

1988 ◽  
Author(s):  
M. Propen ◽  
H. Vogel ◽  
S. Aksoy
Keyword(s):  
Gas Turbine ◽  
Broad Spectrum ◽  
Gas Turbines ◽  
Weight Ratio ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Gas Generator ◽  
Performance Requirements ◽  
Materials Research ◽  
Future Direction

Performance requirements of tomorrow’s gas turbines demand major improvements in specific fuel consumption and thrust to weight ratio. These stringent requirements, in turn, drive the need for higher operating temperatures and lighter weight engines. Such technical improvements impose severe thermal, structural, and metallurgical demands upon turbine components. A broad spectrum of technology programs is underway at Textron Lycoming to address these challenging requirements. This paper outlines the thermal, structural, and materials research needed for achieving the goals of the small gas turbines of tomorrow.

Robust controller design for a three-shaft industrial gas turbine in the infinite grid power generation

2019 ◽  
Vol 42 (1) ◽  
pp. 131-156
Author(s):  
Abdollah Mehrpanahi ◽  
Mohammadreza Arbabtafti ◽  
Gholamhassan Payganeh
Keyword(s):  
Power Generation ◽  
Robust Control ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Controller Design ◽  
Control Design ◽  
Robust Controllers ◽  
Actual System ◽  
Robust Controller ◽  
Robust Control Design

Due to the sensitivity of gas turbines’ power generation in Iran, robustness is considered as a crucial matter and the controllers play an essential role in this objective. The common controllers used in gas turbines are usually based on standard performance. Whereas, robust controllers demonstrate acceptable performance in the presence of adverse factors such as uncertainties, disturbances, and input step changes. In this study, dynamic structures and various robust control design scenarios for an MGT-30 three-shaft gas turbine have proposed. Input-output matrices have been presented based on the dynamic model structures, and a standard robust controller structure has been used to design and present transfer matrices. Four scenarios have been considered in the robust control design according to the number of control variables, uncertainties, and disturbance effects, evolutionally, respectively. [Formula: see text] and [Formula: see text] methods were used in the controller design when presenting the results of using the existing PID controller. The results show that with the increase and develop in parameters influencing the production of the actual system behavior and the controller responses improve noticeably. Finally, the fourth scenario was proposed as a scenario with more desirable robustness features than other scenarios, which provide a complete array of robust controllers.

A Model-Based Controller for Commercial Aero Gas Turbines

2002 ◽  
Author(s):  
Arkadiy Turevskiy ◽  
Richard Meisner ◽  
Robert H. Luppold ◽  
Ronald A. Kern ◽  
James W. Fuller
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Controller Design ◽  
Control Loop ◽  
Turbine Engine ◽  
Model Based Control ◽  
Engine Model ◽  
Model Based ◽  
Loop Feedback

This article describes the design and development of a model-based control system for a large commercial aero gas turbine engine. The control system, referred to as the Integrated Margin Management (IMM) control, exploits a real-time engine model (RTEM) to estimate control loop feedback signals, enabling the implementation of nontraditional control modes. These nontraditional control modes include algorithms for controlling, optimizing, and/or trading off margins to key operational limits such as thrust, compressor stability, combustor stability, turbine life, redline limits, and emissions. An overview of the results produced with the IMM controller design illustrates the feasibility of this approach for commercial aero gas turbine applications.

A Micro Gas Turbine Based Test Rig for Educational Purposes

2009 ◽  
Author(s):  
Mario L. Ferrari ◽  
Matteo Pascenti ◽  
Loredana Magistri ◽  
Aristide F. Massardo
Keyword(s):  
Gas Turbine ◽  
Undergraduate Students ◽  
Gas Turbines ◽  
Dynamic Performance ◽  
General Purpose ◽  
Strategy Development ◽  
Micro Gas Turbine ◽  
High Flexibility ◽  
The University ◽  
Gas Turbine Cycle

The Thermochemical Power Group (TPG) of the University of Genoa, Italy, has developed a new “Gas Turbine” laboratory to introduce undergraduate students to Gas Turbines and Innovative Cycles course, and Ph.D.s to advanced experimental activities in the same field. In the laboratory a general-purpose experimental rig, based on a modified commercial 100 kW recuperated micro gas turbine, was installed and fully instrumented. One of the main objectives of the laboratory is to provide both students and researchers with several experimental possibilities to obtain data related to the gas turbine steady-state, transient and dynamic performance including the effect of interaction between the turbomachines (especially the compressor) and more complex innovative gas turbine cycle configurations, such as recuperated, humid air, and hybrid (with high temperature fuel cells). The facility was partially funded by two Integrated Projects of the EU VI Framework Program (Felicitas and Large-SOFC) and the Italian Government (PRIN project) and it was designed with a high flexibility approach including: flow control management, co-generative and tri-generative applications, downstream compressor volume variation, grid-connected or stand-alone operations, recuperated or simple cycles, and room temperature control. The layout of the whole system, including connection pipes, valves, and instrumentation (in particular mass flow meter locations) was carefully designed, for educational purposes, by a group of Ph.D. students using CFD tools (Fluent), and it is presented in detail in this paper. The paper also shows, as an example of the possibilities offered by the rig, experimental data obtained by both Master and Ph.D. students. The tests presented here are essential for understanding commercial microturbine performance, control strategy development, and theoretical model validation.

Good News About Gas Turbine Standards

2011 ◽  
Author(s):  
Robert Putnam ◽  
George Osolsobe
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Air Conditioning ◽  
Performance Test ◽  
Good News ◽  
Performance Requirements ◽  
Turbine Inlet ◽  
Final Development ◽  
Conditioning Equipment

Performance Test Codes (PTC) for gas turbines are about to experience a happy convergence of revisions to three principal documents. Several aspects of gas turbines are under consideration in ASME PTC 22 Gas Turbines, ASME PTC 36 Gas Turbine Installations Sound Emissions and ASME PTC 51 Gas Turbine Inlet Air Conditioning Equipment, all of which are in various stages of final development. These PTCs can be used to specify equipment and to perform verification testing to ensure conformance to performance requirements. This overview of the three PTCs will address the key concerns driving the development of the standards, the general issues addressed and the application and significance of uncertainties relevant to each.

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