Next Article in Journal
Interval Optimization-Based Optimal Design of Distributed Energy Resource Systems under Uncertainties
Previous Article in Journal
Techno-Economic Analysis of Pressurized Oxy-Fuel Combustion of Petroleum Coke
Previous Article in Special Issue
Risk Assessment of Smart Substation Relay Protection System Based on Markov Model and Risk Transfer Network
Article

Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility

Department of Power Engineering and Turbomachinery, Silesian University of Technology, 44-100 Gliwice, Poland
*
Author to whom correspondence should be addressed.
This manuscript is an extended version of our Article published in E3S Web of Conferences 137, 01026 (2019), RDPE 2019, 3–6 December 2019, Warsaw, Poland.
Energies 2020, 13(13), 3464; https://doi.org/10.3390/en13133464
Received: 9 June 2020 / Revised: 29 June 2020 / Accepted: 2 July 2020 / Published: 4 July 2020
An increase in the share of renewable sources in the energy mix makes coal-fired power plants operate in new conditions that require more dynamic operation and adequate flexibility. The frequency of the power unit start-ups increases and so does the frequency of changes in loads. This intensifies some life consumption processes, such as low-cycle fatigue and crack propagation in the turbine components. Further operation of power unit elements that have already been in service for a long time has to be supplemented with new diagnostic and repair procedures that take into account the intensification of life consumption processes. This article gives predictions about the propagation rate of potential cracks in the turbine rotor for different scenarios of the power unit’s long-term operation. A method is presented of rational selection of the diagnostic testing time based on risk analysis. The method is used to estimate the optimal interval after which diagnostic testing of a 200 MW turbine rotor should be carried out. Changes in the rotor steel crack toughness are evaluated based on the results of testing of microspecimens cut out of the rotor. Turbines with more frequent start-ups and shorter start-up times necessitate performance of diagnostic testing of the rotor central bore after about 12 years of turbine operation. View Full-Text
Keywords: maintenance planning; risk; turbine maintenance planning; risk; turbine
Show Figures

Figure 1

MDPI and ACS Style

Tomala, M.; Rusin, A.; Wojaczek, A. Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility. Energies 2020, 13, 3464. https://doi.org/10.3390/en13133464

AMA Style

Tomala M, Rusin A, Wojaczek A. Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility. Energies. 2020; 13(13):3464. https://doi.org/10.3390/en13133464

Chicago/Turabian Style

Tomala, Martyna, Andrzej Rusin, and Adam Wojaczek. 2020. "Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility" Energies 13, no. 13: 3464. https://doi.org/10.3390/en13133464

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop