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Sep 26, 2018 · Control quality of an once-through boiler's water-fuel ratio (WFR) and main-steam temperature are heavily influenced by the control quality of the once-through boiler's intermediate point enthalpy (IPE), and it is also related to the economic and stable operation of the a once-through boiler. In order to control the IPE in a better way and to increase boiler efficiency, an …
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May 01, 2009 · There are four usual modes of operation in the world of drum boilers: base mode, boiler-following mode, turbine-following mode, and coordinated control (Table 1). Each of these operating modes is
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Jun 15, 2007 · Current conventional wisdom assumes that coordinated boiler/turbine control strategies apply a common unit demand directly and simultaneously to the control systems of the boiler and the turbine
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May 20, 2011 · Coordinated controller tuning of the boiler turbine unit is a challenging task due to the nonlinear and coupling characteristics of the system. In this paper, a new variant of binary particle swarm optimization (PSO) algorithm, called probability based binary PSO (PBPSO), is presented to tune the parameters of a coordinated controller. The simulation results show that …
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coordinated control system. This type of controller simultaneously adjusts firing rate, pumping rate, and turbine throttling in order to follow changes in load demand. Such a coordinated control mode is shown in Fig.2. In this type of control, both pressure and generated output are fed back for the control of both boiler and turbine.
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Jul 29, 2016 · Modeling of drum boiler-turbine unit and the model-based coordinated control strategy Abstract: As more stringent requirements are proposed for the load and frequency regulation in modern power grid, the performance of load tracking and main steam pressure stability becomes more important for the safe and economical operation of thermal power
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Coordinated control is the fittest strategy to control a boiler-turbine system during the load following mode. The book investigates some theoretical analysis on multi-objective optimization problems, heuristic algorithms, and power plant control techniques. The book has five chapters. Each chapter concludes some insights about simulation programs.
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It is significant for power system stability to improve the operation flexibility of grid-connected units. Such improvement has always been a hot topic, especially for coal-fired units. In recent decades, it has become increasingly urgent and challenging as large-scale fluctuant renewable energy is connected to the power grid. Boiler-turbine coordinated control strategy (CCS), …
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components of CCS, control strategies for the coal flow, air flow, boiler feedwater flowrate and reheat steam temperature are developed. The control strategy for the main steam temperature control is developed with due consideration of the time delay of the SCPC system.
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Jul 29, 2016 · Modeling of drum boiler-turbine unit and the model-based coordinated control strategy Abstract: As more stringent requirements are proposed for the load and frequency regulation in modern power grid, the performance of load tracking and main steam pressure stability becomes more important for the safe and economical operation of thermal power
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This paper presents a new nonlinear coordinated control strategy for overcoming the influence of process nonlinearities and improving the load-following capability of coal-fired boiler-turbine units. A feedback linearization law is deduced via the dynamic extension algorithm of vector relative degree for a typical boiler-turbine unit model. By the law, exactitude feedback …
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First, the coordinated control strategy constitutes the uppermost control level in the FFPU, and it is regarded as a single entity to drive the boiler-turbine-generator set. Second, an Intelligent Coordinated Control System (ICCS) for a wide-range operation is proposed. The ICCS implements a two-level hierarchical intelligent hybrid coordinated
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This paper gives coordinated control method techniques like fuzzy and self tuning in a newly developed boiler turbine. This boiler turbine system includes many features like multi variable process, nonlinear, deadly time variant plant with high settling time and lot a of cautious. These turbines have strong couplings which are implemented
Get priceIt is significant for power system stability to improve the operation flexibility of grid-connected units. Such improvement has always been a hot topic, especially for coal-fired units. In recent decades, it has become increasingly urgent and challenging as large-scale fluctuant renewable energy is connected to the power grid. Boiler-turbine coordinated control strategy (CCS), …
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In [20] a reconfigurable unit control system that can be switched among different control strategies (i.e., boiler follow, turbine follow and coordinated control) is presented. The necessary task for reconfiguration are carried out on-line by four expert systems working cooperatively at the supervisory level.
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Oct 24, 2005 · A new coordinated control strategy for boiler-turbine system of coal-fired power plant. Abstract: This paper presents the new development of the boiler-turbine coordinated control strategy using fuzzy reasoning and autotuning techniques. The boiler-turbine system is a very complex process that is a multivariable, nonlinear, slowly time-varying plant with large …
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coordinated control system. This type of controller simultaneously adjusts firing rate, pumping rate, and turbine throttling in order to follow changes in load demand. Such a coordinated control mode is shown in Fig.2. In this type of control, both pressure and generated output are fed back for the control of both boiler and turbine.
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3.2 PBPSO-based coordinated controller structure of a boiler turbine unit The schematic diagram of a coordinated controller for a boiler turbine unit can be considered, as in Fig. 2, where P is the process model, D is the decoupler for achieving diag- onal dominance to eliminate the coupling of the process, µ is the governor valve position, β
Get priceJun 10, 2008 · A New Coordinated Control Strategy for Boiler-Turbine System of Coal-Fired Power Plant," IEEE Trans. Control Syst. Technol. 1063-6536, 13 (6
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be fast [6]. At present, boiler-turbine coordinated control strategy (CCS), which is mainly about using the thermal storage in the boiler system, is a popular strategy to regulate steam turbine output power in thermal power plants [7]. However, the …
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Mar 01, 2021 · [6] Li S, Liu H, Cai W J, Soh Y C and Xie L H 2005 A New Coordinated Control Strategy for Boiler-Turbine System of Coal-Fired Power Plant IEEE Trans. Control Syst. Technol. 13 943-54. Go to reference in article Google Scholar
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In order to realize the optimal control of boiler combustion system, this paper presents the fuzzy-PID control Strategy applied in steam temperature control. Simulation results for different cases of boiler combustion system show that the control strategy has better ability.
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CFB boiler steam pressure change is typically a few minutes or 20 minutes later than the fuel rate change. The lagged CFB steam generation results in the problem of load control or AGC control in CFB unit. Hence, a new coordinated-control (CC) scheme should be introduced to replace the slower response of CFB by
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The responses of plant with new coordinated control were compared with the real plant responses over a wide range of operations, where the real system has a conventional turbine-follower control strategy. Keywords: The thermal power plant, the steam boiler, cascadecontrol, PID controller,boiler-turbine co-ordinate control. 1. INTRODUCTION
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In this paper, a novel robust control approach is proposed to improve the coordinated control performance for subcritical boiler-turbine units. To capture the key features of the boiler-turbine system, a nonlinear control-oriented model is established and validated with the history operation data of a 300 MW unit.
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A Model-Based Coordinated Control Concept for Steam Power
Get priceNov 01, 2015 · This paper presents the new development of the boiler-turbine coordinated control strategy using fuzzy reasoning and autotuning techniques. The boiler-turbine system is a very complex process that is … Expand
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Boiler-turbine coordinated control strategy (CCS), which is employed to perform unit load control according to automatic generation control (AGC), has a slow ramp rate in general on account of large delay and inertia of boiler, so to improve the unit operating flexibility, it is necessary to explore usable heat storage and optimize the control
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A comprehensive dynamic model of a steam power plant, including turbine, governor, and boiler models, is proposed in this paper. The whole turbine-boiler control strategies inter alia turbine following, boiler following, coordinated control, and sliding pressure control modes are also taken into account in the modelling procedure, making the integrated model adaptable for all the …
Get priceCoordinated control system is the unit load control system, by the turbine and boiler coordinated action, which realizes the unit load control. On the one hand, the control unit give output power to satisfy the requirement of electric load; Each subsystem, on the other handcoordination of …
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In this paper, a novel robust control approach is proposed to improve the coordinated control performance for subcritical boiler-turbine units. To capture the key features of the boiler-turbine system, a nonlinear control-oriented model is established and validated with the history operation data of a 300 MW unit.
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This paper firstly established a nonlinear dynamic model of a 330 MW drum boiler unit, which has a clear physical meaning and is conducive to the design of coordinated control system (CCS). On this basis, the boiler energy storage coefficient is calculated, and …
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Coordinated control system is the unit load control system, by the turbine and boiler coordinated action, which realizes the unit load control. On the one hand, the control unit give output power to satisfy the requirement of electric load; Each subsystem, on the other handcoordination of …
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A Model-Based Coordinated Control Concept for Steam Power
Get priceA new coordinated control strategy for boiler-turbine system of coal-fired power plant. Control Systems Technology, IEEE Transactions on, Vol. 13, No. 6 (2005), pp.943-954. DOI: 10.1109/tcst.2005.854319
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The boiler system in power plant consists mainly of a steam-water system and combustion system, which produce a high-pressure superheated steam to drive a generator in order to produce power. The steam temperature control of the boiler system is a critical operational consideration. Parameters of boiler producing process must be controlled strictly.
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A new coordinated control strategy(CCS) has been proposed for control of boiler turbine system which is executed in two levels namely the basic level in …
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The boiler-turbine unit control schemes have gone through several decades of evolution and, typ-ically, a cascade of PI/PID controllers based on single-input single-output control loops is designed in the plant to fulfill such tasks.6,7 The remain-der of this section will focus mainly on the con-ventional boiler-turbine coordinated control system
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LI et al.: A NEW COORDINATED CONTROL STRATEGY FOR BOILER-TURBINE SYSTEM. 945. Fig. 3. New CCS. A characteristic of the boiler system is highly complex and nonlinear. The main nonlinearity is related to the property of gain …
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Nov 01, 2005 · Abstract. This paper presents the new development of the boiler-turbine coordinated control strategy using fuzzy reasoning and autotuning techniques. The boiler-turbine system is a very complex process that is a multivariable, nonlinear, slowly time-varying plant with large settling time and a lot of uncertainties.
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