Online reliability assessment of energy systems based on a high-order extended-state-observer with application to nuclear reactors

Zhe Dong, Bowen Li, Junyi Li, Xiaojin Huang and Zuoyi Zhang

Renewable and Sustainable Energy Reviews, 2022, vol. 158, issue C

Abstract: Online reliability assessment is not only crucial for the safe and stable operation of energy systems but also meaningful for guaranteeing satisfactory economic competitiveness. Due to the system reliability can be determined by the failure-rate and operation time, the central in online reliability assessment of energy systems is the evaluation of failure-rate. Further, it can be seen that the deviations of actual responses of process variables from their expectations reflect the effect of total disturbance, and large deviations usually denote the existence of the degradation of system reliability. Hence, the failure-rate can be evaluated based on the estimation of total disturbance and its differentiation. In this paper, a high-order extended state observer (HO-ESO) is proposed for the nonlinear dissipative system representing typical energy system dynamics, which provides globally bounded observations for not only system state-variables but also the total disturbance and its differentiation. Then, the evaluations of both the failure-rate and the system reliability can be given online based on the estimation provided by the HO-ESO. Further, this HO-ESO-based online reliability assessment method is applied to the health monitoring of pressurized water reactor (PWR). After checking the dissipation condition of PWR, the HO-ESO of PWR is designed, and the simulation results show the feasibility and effectiveness.

Keywords: Energy system reliability; Online reliability estimation; Extended-state-observer (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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DOI: 10.1016/j.rser.2022.112159

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