A dynamic process for evaluating the reliability of fossil power plant assets

Abstract

Budgets and maintenance programs in fossil power plants are frequently set based on engineering judgment rather than a Probabilistic Risk Assessment (PRA). Fossil power plants seldom use PRA due to a lack of practical processes, especially when field reliability data are not readily available. In the absence of field data, using general industry data may not be right for conducting PRA for a given organization as the operation and maintenance conditions significantly vary between organizations. To have a successful PRA, an organization needs to use its own field data, and have an efficient process for its organization. Studies have suggested using field data provides a robust model and accurate results. Use of Reliability Block Diagrams for Reliability, Availability, and Maintainability analysis is not new. However, applications of these techniques are new to fossil power plants. In this paper, we propose a practical process by integrating several existing reliability techniques for fossil plants to apply PRA. The process was tested at many power plants, and the results aligned well with the actual values. The methodology outlined in this paper is a forward-looking tool for managers to predict system reliability, and proactively develop maintenance plans and budgets.

Archives of Thermodynamics

“…The wear coefficients are empirical, so their values for different types of main equipment are presented in Table 1 [6].…”

“…Traditionally, reliability analyses are based on deterministic methods such as Life Data Analysis. These methods are generally used for non-repairable equipment in the manufacturing and automobile industries [6]. In [7] a failure probability model for intensively used thermal power plants was developed.…”

The Management of Power System Reliability in the Offshore Oil and Gas Field

“…In the electric power business that strongly maintains outages (disturbances), some research regarding the reliability of electric power systems has been made such as plant reliability (Martinek et al, 2017;Palakodeti et al, 2020), transformers (Chafai et al, 2016), switchgears (Chen et al, 2018;Ruan et al, 2020), protection (Zhang, 2012), power grids both transmission and distribution (Boateng et al, 2003;Khudyakov, 2011;Tien et al, 2018), & systems (Pinchukov & Makasheva, 2018).…”