Dynamic Modeling of a Cogenerating Nuclear Gas Turbine Plant—Part II: Dynamic Behavior and Control

2002 ◽  
Vol 124 (3) ◽  
pp. 734-743 ◽  
Author(s):  
J. F. Kikstra ◽  
A. H. M. Verkooijen
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Dynamic Behavior ◽  
Control Structure ◽  
Control Valve ◽  
Turbine Plant ◽  
Control Loops ◽  
Wide Range ◽  
Gas Turbine Plant ◽  
And Control

Using the dynamic model of the cogenerating nuclear gas turbine plant developed in Part I of this article, the dynamic behavior of this plant is analyzed and a control structure is designed. First it is determined how several design choices affect the system dynamics. Then the requirements and options for a control system design are investigated. A number of possible control valve positions in the flowsheet are tested with transients in order to make an argued choice. The model is subsequently used to determine the optimal working conditions for different heat and power demands, these are used as set-points for the control system. Then the interaction between manipulated and controlled variables is mapped and based on this information a choice for coupling them in decentralized feedback control loops is made. This control structure is then tuned and tested. It can be concluded that both heat and power demand can be followed with acceptable performance over a wide range.

Dynamic Behavior of a Solar Heated Receiver of a Gas Turbine Plant

1986 ◽  
Author(s):  
K. Bammert ◽  
J. Johanning
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Dynamic Behavior ◽  
Calculation Method ◽  
Sufficient Accuracy ◽  
Turbine Plant ◽  
Parabolic Dish ◽  
Gas Turbine Plant ◽  
And Storage ◽  
Storage Processes

The mainly instationary operation of a solar heated receiver can be simulated with sufficient accuracy only if data about the dynamic behavior are available. For this reason, the dynamic behavior of a solar cavity receiver with parabolic dish collector is investigated. The development of a mathematical simulation considering heat transfer and storage processes is presented and the procedure for a numerical solution is illustrated. The performance of the calculation method is finally demonstrated by simulating the passage of a cloud.

Supporting Windpower Within a Separate Electric Power Grid

2011 ◽  
Author(s):  
Zygfryd Domachowski ◽  
Marek Dzida ◽  
M. Hossein Ghaemi
Keyword(s):  
Control System ◽  
Power System ◽  
Electric Power ◽  
Gas Turbine ◽  
Electric Power System ◽  
Combined Cycle ◽  
Turbine Plant ◽  
Wind Turbulence ◽  
Gas Turbine Plant ◽  
Plant Control

Utilization of windpower is considerably increasing in many countries around of the world. However, it produces an unreliable output due to the vagaries of the wind profile. To solve the problem, wind energy should be supported by local conventional sources. The requirements concerning the reliability and quality of electric energy supply can be most satisfactorily fulfilled when a windfarm is connected to a large electric power system. Then any electric power fluctuations, resulting either from wind turbulence or power demand variation, provoke system frequency variations. They should be damped by applying an appropriate control system of such a large power system. In this paper, the problem of control of a separate electric power system composed of windpower farm and supported by a gas turbine plant or a combined cycle has been investigated. First, the impact of wind turbulence on gas turbine plant control system has been modeled and simulated. This is carried out for different amplitudes and frequencies of wind speed. Next, the structure of gas turbine plant control system and its parameters have been adapted to limit the power and frequency fluctuations resulting from wind turbulence. Then the design is further developed by considering a combined cycle instead of a single gas turbine.

Dynamic Behavior of a Solar-Heated Receiver of a Gas Turbine Plant

1987 ◽  
Vol 109 (1) ◽  
pp. 71-78
Author(s):  
K. Bammert ◽  
J. Johanning
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Dynamic Behavior ◽  
Calculation Method ◽  
Sufficient Accuracy ◽  
Turbine Plant ◽  
Parabolic Dish ◽  
Gas Turbine Plant ◽  
And Storage ◽  
Storage Processes

The mainly nonstationary operation of a solar-heated receiver can be simulated with sufficient accuracy only if data about the dynamic behavior are available. For this reason, the dynamic behavior of a solar cavity receiver with parabolic dish collector is investigated. The development of a mathematical simulation considering heat transfer and storage processes is presented and the procedure for a numerical solution is illustrated. The performance of the calculation method is finally demonstrated by simulating the passage of a cloud.

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.

Available Systems for the Conversion of Waste Heat to Electricity

2014 ◽  
Author(s):  
N. Tauveron ◽  
S. Colasson ◽  
J.-A. Gruss
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Maximum Temperature ◽  
Thermodynamic Efficiency ◽  
Turbine Plant ◽  
Wide Range ◽  
Gas Turbine Plant

The conversion of heat into electricity, generally speaking heat-to-power generation, is a wide area of technologies and applications. This paper focuses on available systems, excepted the internal combustion cycles, applied to transform (waste) heat to power. Data of referenced market proved or time-to-market technologies are presented. A database of more than 1100 references has been built. The following categories can be found: Rankine Cycle plant, Organic Rankine Cycle plant, Steam engine, Kalina Cycle plant, Brayton cycle plant, micro gas turbine, closed cycle gas turbine plant, combined cycle gas turbine plant, Stirling engine, Ericsson engine and thermoelectric generator. We intentionally target a range of power from Watts to hundreds of MW, covering the range of temperature [80–1000°C] usually addressed by these systems. The comparison of performances is hereby discussed and compared to thermodynamic principles and theoretical results in the graph Maximum temperature [°C] versus Thermodynamic efficiency. Comparison with Carnot and Chambadal-Novikov-Curzon-Ahlborn efficiencies are performed. A more original contribution is the presentation of the graph Power [W] versus Thermodynamic efficiency. The analysis reveals a monotonous trend inside each technology. Furthermore this general behavior covers a very wide range of power, including technological transitions. Finally, the position of each technology in the map Maximum temperature [°C] versus Power [W] is also analyzed. Explanations based on thermodynamics and techno-economic approaches are proposed.

Experimental Determination of the Heat Recovery Boiler Effectiveness of a Gas Turbine Plant

2014 ◽  
Vol 659 ◽  
pp. 503-508
Author(s):  
Sorin Gabriel Vernica ◽  
Aneta Hazi ◽  
Gheorghe Hazi
Keyword(s):  
Experimental Data ◽  
Gas Turbine ◽  
Heat Recovery ◽  
Heat Recovery Boiler ◽  
Experimental Point ◽  
Experimental Data Processing ◽  
Turbine Plant ◽  
Transfer Unit ◽  
Gas Turbine Plant ◽  
Recovery Boiler

Increasing the energy efficiency of a gas turbine plant can be achieved by exhaust gas heat recovery in a recovery boiler. Establishing some correlations between the parameters of the boiler and of the turbine is done usually based on mathematical models. In this paper it is determined from experimental point of view, the effectiveness of a heat recovery boiler, which operates together with a gas turbine power plant. Starting from the scheme for framing the measurement devices, we have developed a measurement procedure of the experimental data. For experimental data processing is applied the effectiveness - number of transfer unit method. Based on these experimental data we establish correlations between the recovery boiler effectiveness and the gas turbine plant characteristics. The method can be adapted depending on the type of flow in the recovery boiler.

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.

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