Affine nonlinear control for an ultra-supercritical coal fired once-through boiler-turbine unit

Zhou, Hong; Chen, Cheng; Lai, Jingang; Lu, Xiaoqing; Deng, Qijun; Gao, Xingran; Lei, Zhongcheng

doi:10.1016/j.energy.2018.04.061

Cited by 34 publications

(9 citation statements)

References 22 publications

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“…There is a 30% boiler maximum continuous rating capacity electric speed feed pump, which is used only for the unit to start and not to do hot standby. The boiler export steam parameter is 25.4MPa(a)/571℃/569℃, and the boiler maximum continuous rating of 2250t/h [9,10].…”

Section: Unit Profilementioning

confidence: 99%

Research on Coordinated Control Strategy of Power Response Rate of Thermal Power Plant with High Temperature Molten Salt Heat Storage

Li¹,

Li²,

Ma³

2023

IJHT

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Large-scale intermittent renewable energy grid-connected power generation requires thermal power units with sufficient flexibility to adjust resources, which can achieve deep peak regulation of 35% THA, and respond to load changes when intermittent renewable energy is connected to the grid in real time. In this paper, the flue gas heating molten salt is extracted directly from the process flow of the thermal power unit for heat storage, and the energy utilization efficiency is theoretically about three times that of the electric heat storage peak regulating system. The simulation results show that the coordinated control of flue gas-molten salt heat exchanger, molten salt-water/steam heat exchanger and boiler main control can reduce the depth peak regulation of thermal power units by 10%. The coordinated control method of thermal power unit of coupled molten salt heat storage system can effectively improve the response speed of AGC and primary frequency modulation of thermal power unit, and the output power response speed is increased by 39.12% after stabilization.

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Section: Unit Profilementioning

confidence: 99%

Research on Coordinated Control Strategy of Power Response Rate of Thermal Power Plant with High Temperature Molten Salt Heat Storage

Li¹,

Li²,

Ma³

2023

IJHT

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“…(1) The elements of y(t), K(t, s 1 ) L m j m (t, s 1 , s 2 ) (see Equation ( 17)) are twice continuously differentiable functions with respect to the set of arguments, (2)…”

Section: Volterra Polynomial Equations Of the First Kind In The Probl...mentioning

confidence: 99%

“…(1) Problems with statistical or dynamic technological criteria (optimization of the basic parameters of the boiler unit [2], temperature control [3], maximum efficiency of combustion processes [4,5], changes in design parameters [6], etc. ); (2) Problems with statistical or dynamic technical and economic criteria (energy-saving of thermal energy [7], minimization of operating costs [8], maximum profit [9], etc.…”

Section: Introductionmentioning

confidence: 99%

Integral Equations Related to Volterra Series and Inverse Problems: Elements of Theory and Applications in Heat Power Engineering

Solodusha

Bulatov

2021

Mathematics

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The paper considers two types of Volterra integral equations of the first kind, arising in the study of inverse problems of the dynamics of controlled heat power systems. The main focus of the work is aimed at studying the specifics of the classes of Volterra equations of the first kind that arise when describing nonlinear dynamics using the apparatus of Volterra integro-power series. The subject area of the research is represented by a simulation model of a heat exchange unit element, which describes the change in enthalpy with arbitrary changes in fluid flow and heat supply. The numerical results of solving the problem of identification of transient characteristics are presented. They illustrate the fundamental importance of practical recommendations based on sufficient conditions for the solvability of linear multidimensional Volterra equations of the first kind. A new class of nonlinear systems of integro-algebraic equations of the first kind, related to the problem of automatic control of technical objects with vector inputs and outputs, is distinguished. For such systems, sufficient conditions are given for the existence of a unique, sufficiently smooth solution. A review of the literature on these problem types is given.

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“…The combustion system of 1000 MW ultra‐supercritical coal‐fired once‐through boiler‐turbine units is taken for example in this paper. Due to the high complexity, nonlinearity, multi‐variable, strong coupling and large delay characters of the ultra‐supercritical once‐through boiler [27], the controlling faces great challenges in actual operation. Therefore a virtual experiment for the complex control system.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of virtual experiment for complex control system: A case study of thermal control process

Guan

Zhou

et al. 2021

IET Generation Trans & Dist

Self Cite

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Online experimental systems that include remote and virtual experiments based on the Internet has become a new form of experiment in engineering education. This paper proposes a virtual experiment for the complex process control system. It is based on the networked control system laboratory (NCSLab), which provides a reliable framework for virtual thermal experiment. Taking the combustion system of 1000 MW ultra-supercritical coal-fired once-through boiler-turbine units as an example, the framework and the implementation process of the online system are given in this paper. A new presentation form for complex processes control experiment is provided, which could be a solution for simulating physical experimental equipment in virtual environments. The potential danger in practical experiments could be avoided. Additionally, the real-time operation for complex control systems could be presented in a 3D scene. Meanwhile, the flexibility and efficiency could be increased in engineering experimental education. Moreover, using the experiment evaluation method, the references and feedback for teaching and assessment are provided in this paper.

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Affine nonlinear control for an ultra-supercritical coal fired once-through boiler-turbine unit

Cited by 34 publications

References 22 publications

Research on Coordinated Control Strategy of Power Response Rate of Thermal Power Plant with High Temperature Molten Salt Heat Storage

Research on Coordinated Control Strategy of Power Response Rate of Thermal Power Plant with High Temperature Molten Salt Heat Storage

Integral Equations Related to Volterra Series and Inverse Problems: Elements of Theory and Applications in Heat Power Engineering

Design and implementation of virtual experiment for complex control system: A case study of thermal control process

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