Heavy-Duty Gas Turbine Plant Aerothermodynamic Simulation Using Simulink

1998 ◽  
Vol 120 (3) ◽  
pp. 550-556 ◽  
Author(s):  
G. Crosa ◽  
F. Pittaluga ◽  
A. Trucco ◽  
F. Beltrami ◽  
A. Torelli ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Gas Turbine ◽  
Dynamic Responses ◽  
State Variables ◽  
Algebraic Equations ◽  
Heavy Duty ◽  
Combustion Chambers ◽  
Turbine Plant ◽  
Gas Turbine Plant ◽  
Heavy Duty Gas Turbine

This paper presents a physical simulator for predicting the off-design and dynamic behavior of a single shaft heavy-duty gas turbine plant, suitable for gas-steam combined cycles. The mathematical model, which is nonlinear and based on the lumped parameter approach, is described by a set of first-order differential and algebraic equations. The plant components are described adding to their steady-state characteristics the dynamic equations of mass, momentum, and energy balances. The state variables are mass flow rates, static pressures, static temperatures of the fluid, wall temperatures, and shaft rotational speed. The analysis has been applied to a 65 MW heavy-duty gas turbine plant with two off-board, silo-type combustion chambers. To model the compressor, equipped with variable inlet guide vanes, a subdivision into five partial compressors is adopted, in serial arrangement, separated by dynamic blocks. The turbine is described using a one-dimensional, row-by-row mathematical model, that takes into account both the air bleed cooling effect and the mass storage among the stages. The simulation model considers also the air bleed transformations from the compressor down to the turbine. Both combustion chambers have been modeled utilizing a sequence of several sub-volumes, to simulate primary and secondary zones in presence of three hybrid burners. A code has been created in Simulink environment. Some dynamic responses of the simulated plant, equipped with a proportional-integral speed regulator, are presented.

scholarly journals Heavy-Duty Gas Turbine Plant Aerothermodynamic Simulation Using Simulink

1996 ◽  
Author(s):  
G. Crosa ◽  
F. Pittaluga ◽  
A. Trucco Martinengo ◽  
F. Beltrami ◽  
A. Torelli ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Gas Turbine ◽  
Dynamic Responses ◽  
State Variables ◽  
Algebraic Equations ◽  
Heavy Duty ◽  
Combustion Chambers ◽  
Turbine Plant ◽  
Gas Turbine Plant ◽  
Heavy Duty Gas Turbine

This paper presents a physical simulator for predicting the off-design and dynamic behaviour of a single shaft heavy-duty gas turbine plant, suitable for gas-steam combined cycles. The mathematical model, which is non linear and based on the lumped parameter approach, is described by a set of first-order differential and algebraic equations. The plant components are described adding to their steady state characteristics the dynamic equations of mass, momentum and energy balances. The state variables are mass flow rates, static pressures, static temperatures of the fluid, wall temperatures and shaft rotational speed. The analysis has been applied to a 65 MW heavy-duty gas turbine plant with two off-board silo-type combustion chambers. To model the compressor, equipped with variable inlet guide vanes, a subdivision into five partial compressors is adopted, in serial arrangement, separated by dynamic blocks. The turbine is described using a one dimensional row by row mathematical model, that takes into account both the air bleed cooling effect and the mass storage among the stages. The simulation model considers also the air bleed transformations from the compressor down to the turbine. Both combustion chambers have been modelled utilising a sequence of several sub-volumes, to simulate primary and secondary zones in presence of three hybrid burners. A code has been created in Simulink environment. Some dynamic responses of the simulated plant, equipped with a proportional-integral speed regulator, are presented.

scholarly journals Modelling and Recoupling the Control Loops in a Heavy-Duty Gas Turbine Plant

1995 ◽  
Author(s):  
G. Crosa ◽  
G. Ferrari ◽  
A. Trucco
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Linear Model ◽  
Transfer Functions ◽  
Heavy Duty ◽  
Turbine Plant ◽  
Exhaust Temperature ◽  
Non Linear ◽  
Gas Turbine Plant ◽  
Heavy Duty Gas Turbine

This paper presents a dynamic simulation of a single shaft heavy-duty gas turbine plant, suitable for gas-steam combined cycles. The plant is operated at maximum gas turbine exhaust temperature, using variable inlet guide vanes (VIGV) as control. In the first section, a non-linear lumped parameter mathematical model is described: it includes a control system representative of those controls normally utilised by industry today. Some dynamic responses of a controlled plant taken as an example are presented. In the second section, a different control system is proposed, operating with no interaction between the speed and exhaust temperature loops. To this aim, a linear model in the frequency domain of the uncontrolled plant is obtained, starting from the non-linear model in the time domain. Assuming that each one of manipulated variables influences only one of the controlled variables (VIGV only the exhaust gas temperature and the fuel mass rate only the load), the transfer functions of two new blocks have been obtained. To compensate for the system non linearity, the calculations are repeated for different load levels. The new control feature can offer advantages in the time response of the regulated plant, especially in the operating range where the airflow can be modulated by the VIGV at constant fuel firing temperature.

Theoretical and Experimental Analysis of Heavy Duty Gas Turbine Performance Depending on Ambient Conditions

2003 ◽  
Author(s):  
S. Brusca ◽  
R. Lanzafame
Keyword(s):  
Mathematical Model ◽  
Gas Turbine ◽  
Thermodynamic Analysis ◽  
Engine Performance ◽  
Fuel Oil ◽  
Engine Control ◽  
Heavy Duty ◽  
Ambient Conditions ◽  
Control Logic ◽  
Heavy Duty Gas Turbine

A mathematical model of a heavy duty gas turbine has been implemented using GateCycle™ code. This model is able to simulate the engine behavior running on syngas and fuel oil. Also engine control logic is implemented using Microsoft Excel™ VBA language. The model implemented has been finely tuned and tested with measured data. Test results show that it is able to simulate engine running in on-design and off-design conditions. Using this model, an extensive thermodynamic analysis of light fuel oil and syngas fed engine performance has been carried out in respect of ambient conditions. As it is possible to see in the results of the thermodynamic analysis, at high air temperatures performance reduction occur. Relative humidity have a slightly effect on engine performance when the latter is running on syngas. Instead it doesn’t have a relevant effect on the performance of the engine running on light liquid fuel oil in all the range of ambient temperature investigated. Results of this analysis also show the correct replication of the engine control system. In conclusion, the developed mathematical model is able to simulate gas turbine operations with low errors. So that, it could be used in order to optimise engine performance at the ambient conditions that occur for the site of the IGCC Complex in which gas turbine has integrated as topper.

Transient Analysis of Gas Turbine Power Plants, Using the Huntorf Compressed Air Storage Plant as an Example

1985 ◽  
Author(s):  
T. Schobeiri ◽  
H. Haselbacher
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Transient Analysis ◽  
Power Plants ◽  
Transient Behavior ◽  
Compressed Air ◽  
Closed Cycle ◽  
Combustion Chambers ◽  
Turbine Plant ◽  
Gas Turbine Plant

The design of modern gas turbines requires the predetermination of their dynamic behavior during transients of various kinds. This is especially true for air storage and closed cycle gas turbine plants. The present paper is an introduction to a computatational method which permits an accurate simulation of any gas turbine system. Starting with the conservation equations of aero/thermodynamics, the modular computer program COTRAN was developed, which calculates the transient behavior of individual components as well as of entire gas turbine systems. For example, it contains modules for compressors, turbines, combustion chambers, pipes etc. To demonstrate the effectiveness of COTRAN the shut-down tests of the air storage gas turbine plant Huntorf were simulated and results compared with experimental data. The agreement was found to be very good.

Turbine Model Improvement for a Heavy-Duty Gas Turbine Plant Simulation

1998 ◽  
Author(s):  
G. Crosa ◽  
M. Troilo ◽  
A. Torelli
Keyword(s):  
Gas Turbine ◽  
Electricity Market ◽  
Dynamic Behaviour ◽  
Algebraic Equations ◽  
Heavy Duty ◽  
Lumped Parameter ◽  
Combined Cycles ◽  
Heavy Duty Gas Turbine ◽  
Plant Simulation ◽  
Turbine Model

The interest of the world electricity market in the gas turbine and the gas-steam combined cycles has given a significant stimulus to the development of numerical simulations, useful in the detailed analyses of dynamic behaviour and off-design performance of the gas plant. This paper describes the latest improvements of a physical simulator built to predict the off-design and dynamic behaviour of single shaft, heavy-duty gas turbine plants. The analysis has been applied to the V94.2 and V64.3 models of the Ansaldo Energia production, that feature a compressor equipped with variable inlet guide vanes and an air bleed system cooled turbine. The mathematical model is non linear, based on the lumped parameter approach and described by a set of differential and algebraic equations. In particular, the next version presents a turbine model entirely rebuilt, based on a simplified, one-dimensional row by row calculation method. The equations system and the structure of the new code are here described, and the steady-state results of the dynamic model are compared with the results of an Ansaldo static code with a good correspond in the performance prediction. The model has been developed in the Matlab-Simulink® environment using some FORTRAN subroutines.

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