Output-feedback load-following control of nuclear reactors based on a dissipative high gain filter

Dong, Zhe; Huang, Xiaojin; Liangju, Zhang

doi:10.1016/j.nucengdes.2011.02.029

Cited by 22 publications

(15 citation statements)

References 17 publications

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“…The improved PWR core power LQG/LTR control system was achieved by Arab-Alibeik et al [9] based on SFAC, where there are an inner loop to regulate reference load signals and a outer loop to control model outputs. Dong et al [10][11][12][13][14] presented a physically-based feedback control approach with observers such as a dissipative high gain filter to devise reactor core powerlevel control systems. A multi-model feedback control with a state observer was proposed by Wu et al [15] to carry out power regulations of a PWR core.…”

Section: Feedback Control With State Observermentioning

confidence: 99%

“…Improving power regulation technology of cores by the introduction of control algorithms is an important measure for safety and availability of NPPs. Over the decades, many control algorithms have been exploited and applied by researchers to core power regulations, which are the stateor output-feedback control with a state observer [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], the optimal control [18,19], the neural network or fuzzy intelligent control [20][21][22][23][24][25], the model predictive control [26][27][28], the H ∞ robust control [29][30][31], the sliding model control [32][33][34][35], the fractional order control [36][37][38][39][40][41] and other control algorithms [42][43][44][45][46][47]…”

Section: Introductionmentioning

confidence: 99%

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Review on Application of Control Algorithms to Power Regulations of Reactor Cores

Wang

Liang

et al. 2016

ITM Web Conf.

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Abstract. This research is to solve the stability analysis issue of nonlinear pressurized water reactor cores. On the basis of modeling a nonlinear pressurized water reactor core using the lumped parameter method, its linearized model is achieved via the small perturbation linearization way. Linearized models of the nonlinear core at six power levels are selected as local models of this core. The T-S fuzzy idea for the core is exploited to construct the T-S fuzzy model of the nonlinear core based on the local models and the triangle membership function, which approximates the nonlinear core model within the entire range of power level. This fuzzy model as a bridge is to cater to the stability analysis of the nonlinear core after defining its stability. One stability theorem is deduced to define the nonlinear core is globally asymptotically stable in the global range of power level. Finally, the simulation work and stability analyses are separately completed. Numerical simulations show that the fuzzy model can substitute the nonlinear core model; stability analyses verify the nonlinear core is globally asymptotically stable in the global range of power level.

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Section: Feedback Control With State Observermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review on Application of Control Algorithms to Power Regulations of Reactor Cores

Wang

Liang

et al. 2016

ITM Web Conf.

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“…The IDA-PLC is composed of a nonlinear state-feedback power-level regulator and a state observer. The regulator is realized by adding damping terms iteratively through state-feedback, and the observer just adopts the well-built dissipation based high-gain filter (DHGF) [24,25]. The IDA-PLC is an L 2 disturbance attenuator when there exist exterior disturbances or modeling uncertainties, and it guarantees the globally asymptotic closed-loop stability if there is no disturbance and uncertainty.…”

Section: Open Accessmentioning

confidence: 99%

“…Lemma 1 [24,25]: Consider nonlinear system Equation (67) with State-observer Equation (68), and here suppose that:…”

Section: Observation Strategymentioning

confidence: 99%

Dynamic Output Feedback Power-Level Control for the MHTGR Based On Iterative Damping Assignment

Dong

2012

Energies

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Because of its strong inherent safety features and high outlet temperature, the modular high temperature gas-cooled nuclear reactor (MHTGR) is already seen as the central part of the next generation of nuclear plants. Such power plants are being considered for industrial applications with a wide range of power levels, and thus power-level control is an important technique for their efficient and stable operation. Stimulated by the high regulation performance provided by nonlinear controllers, a novel dynamic output-feedback nonlinear power-level regulator is developed in this paper based on the technique of iterative damping assignment (IDA). This control strategy can provide the L 2 disturbance attenuation performance under modeling uncertainty or exterior disturbance, and can also guarantee the globally asymptotic closed-loop stability without uncertainty and disturbance. This newly built control strategy is then applied to the power-level regulation of the HTR-PM plant, and numerical simulation results show both the feasibility and high performance of this newly-built control strategy. Furthermore, the relationship between the values of the parameters and the performance of this controller is not only illustrated numerically but also analyzed theoretically.

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“…Shtessel gave a nonlinear power-level regulator based on sliding mode control and observation tech-niques for space reactor TOPAZ II [5]. Dong designed a dynamic output feedback dissipation power-level control for the pressurized water reactors (PWRs) [6] by the use of the backstepping technique [7] and dissipation-based high gain filter (DHGF) [8,9]. Etchepareborda and Eliasi proposed the nonlinear MPC (NMPC) method for PWR power-level control design [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

PD Power-Level Control Design for MHTGRs

Dong¹

2014

JPEE

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Due to its inherent safety feature, the modular high temperature gas-cooled reactor (MHTGR) has been seen as one of the best candidates in building next generation nuclear plants (NGNPs). Since the MHTGR dynamics has high nonlinearity, it is necessary to develop nonlinear power-level controller which is not only beneficial to the safe, stable, efficient and autonomous operation of the MHTGR but also easy to be implemented practically. In this paper, based on the concept of shiftedectropy and the physically-based control design approach, it is proved theoretically that the simple proportional-differential (PD) output-feedback power-level control can provide globally asymptotic closed-loop stability. Numerical simulation results verify the theoretical results and show the influence of the controller parameters to the dynamic response.

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Output-feedback load-following control of nuclear reactors based on a dissipative high gain filter

Cited by 22 publications

References 17 publications

Review on Application of Control Algorithms to Power Regulations of Reactor Cores

Review on Application of Control Algorithms to Power Regulations of Reactor Cores

Dynamic Output Feedback Power-Level Control for the MHTGR Based On Iterative Damping Assignment

PD Power-Level Control Design for MHTGRs

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