IFAC-PapersOnLine | VOL. 53
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Flexible Control of Nuclear Cogeneration Plants for Balancing Intermittent Renewables

Publication Date Jan 1, 2020

Abstract

Abstract Due to the complementarity between the intermittent renewable energy (IRE) and the nuclear, it is attractive to interconnect them to supply clean energy consistently and continuously in a large-scale. The flexibility of for integrating the IRE can be provided by actively adjusting the electric power output of nuclear cogeneration plants (NCPs), which induces frequent redistribution of main steam to the turbine and cogeneration process. For the main steam redistribution, it is necessary to guarantee the stability of grid frequency and main steam pressure, which heavily relies on the flexible control of NCPs. In this paper, a new flexible control of NCPs with saturated main steam is proposed based upon the idea of actively suppressing the total disturbance in the dynamics of grid frequency and that of main steam pressure. The stabilization problems of pressure and frequency are transferred to the disturbance attenuation problem of a second-order system, and an active disturbance rejection control (ADRC) is then proposed. This ADRC is applied to the flexible control of a NCP composed of a nuclear heating reactor (NHR), a turbine-generator set and a multi-effect-desalination and thermal-vapor-compression (MED-TVC) process for seawater desalination. Numerical simulation results in the cases of load stepping show that the flexibility of this NCP is satisfactory in balancing the grid.

Concepts
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Active Disturbance Rejection Control
Main Steam
Intermittent Renewable Energy
Process For Seawater Desalination
Main Steam Pressure
Nuclear Heating Reactor
Cogeneration Process
Turbine-generator Set
Process For Desalination
Stability Of Pressure

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