Transient safety assessment and risk mitigation of a hydroelectric generation system

Li, Huanhuan, Xu, Beibei, Arzaghi, Ehsan, Abbassi, Rouzbeh, Chen, Diyi, Aggidis, George A, Zhang, Jingjing and Patelli, Edoardo ORCID: 0000-0002-5007-7247 (2020) Transient safety assessment and risk mitigation of a hydroelectric generation system. Energy, 196. p. 117135.

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Official URL: http://dx.doi.org/10.1016/j.energy.2020.117135

Abstract

Transient safety assessment of hydroelectric generation systems is a major challenge for engineers specialized in hydropower stations around the world. This includes two key scientific issues: the dynamic risk quantification in a multi-factors coupling process, and the identification of elements with highest contribution to system stability. This paper presents a novel and efficient dynamic safety assessment methodology for hydroelectric generation systems (HGSs). Based on a comprehensive fuzzy-entropy evaluation method, the dynamic safety level of the system is estimated by means of probability values, and the influence rate of assessment indices on the HGS risk profile is also obtained. Moreover, a number of risk mitigation and maintenance amendment strategies are discussed to reduce the losses in operation and maintenance (O&M) costs at hydropower stations. The methodology is implemented and validated using an existing hydropower station experiencing a start-up transient process, results of which are shown to be beneficial to operators and risk managers. It is recommended that the presented methodology is applicable not only to the HGS's start-up process but is also promisingly useful for largely fluctuating transient processes of other engineering facilities.

Item Type:	Article
Uncontrolled Keywords:	Hydropower system, Dynamic safety assessment, Multi-factors coupling process, Transient analysis, Risk mitigation
Depositing User:	Symplectic Admin
Date Deposited:	30 Mar 2020 10:53
Last Modified:	18 Jan 2023 23:56
DOI:	10.1016/j.energy.2020.117135
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3081020