Prognostic modelling of valve degradation within power stations

Mark James McGhee, Grant Galloway, Victoria Catterson, Blair Brown, Emma Harrison

Research output: Contribution to conferencePaper

Abstract

Within the field of power generation, aging assets and a desire for improved maintenance decision-making tools have led to growing interest in asset prognostics. Valve failures can account for 7% or more of mechanical failures, and since a conventional power station will contain many hundreds of valves, this represents a significant asset base. This paper presents a prognostic approach for estimating the remaining useful life (RUL) of valves experiencing degradation, utilizing a similarity-based method. Case study data is generated through simulation of valves within a 400MW Combined Cycle Gas Turbine power station.

High fidelity industrial simulators are often produced for operator training, to allow personnel to experience fault procedures and take corrective action in safe, simulation environment, without endangering staff or equipment. This work repurposes such a high fidelity simulator to generate the type of condition monitoring data which would be produced in the presence of a fault. A first principles model of valve degradation was used to generate multiple run-to- failure events, at different degradation rates. The associated parameter data was collected to generate a library of failure cases. This set of cases was partitioned into training and test sets for prognostic modelling and the similarity based prognostic technique applied to calculate RUL. Results are presented of the technique’s accuracy, and conclusions are drawn about the applicability of the technique to this domain.

Conference

ConferenceAnnual Conference of the Prognostics and Health Management Society 2014 (PHM)
CountryUnited States
CityFort Worth
Period29/09/142/10/14

Fingerprint

Degradation
Simulators
Condition monitoring
Power generation
Gas turbines
Aging of materials
Decision making
Personnel

Keywords

  • power generation
  • decision support systems
  • remaining useful life (RUL)
  • prognostic modelling
  • valve degradation

Cite this

McGhee, M. J., Galloway, G., Catterson, V., Brown, B., & Harrison, E. (2014). Prognostic modelling of valve degradation within power stations. Paper presented at Annual Conference of the Prognostics and Health Management Society 2014 (PHM), Fort Worth, United States.
McGhee, Mark James ; Galloway, Grant ; Catterson, Victoria ; Brown, Blair ; Harrison, Emma. / Prognostic modelling of valve degradation within power stations. Paper presented at Annual Conference of the Prognostics and Health Management Society 2014 (PHM), Fort Worth, United States.6 p.
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McGhee, MJ, Galloway, G, Catterson, V, Brown, B & Harrison, E 2014, 'Prognostic modelling of valve degradation within power stations' Paper presented at Annual Conference of the Prognostics and Health Management Society 2014 (PHM), Fort Worth, United States, 29/09/14 - 2/10/14, .

Prognostic modelling of valve degradation within power stations. / McGhee, Mark James; Galloway, Grant; Catterson, Victoria; Brown, Blair; Harrison, Emma.

2014. Paper presented at Annual Conference of the Prognostics and Health Management Society 2014 (PHM), Fort Worth, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Prognostic modelling of valve degradation within power stations

AU - McGhee, Mark James

AU - Galloway, Grant

AU - Catterson, Victoria

AU - Brown, Blair

AU - Harrison, Emma

PY - 2014/9

Y1 - 2014/9

N2 - Within the field of power generation, aging assets and a desire for improved maintenance decision-making tools have led to growing interest in asset prognostics. Valve failures can account for 7% or more of mechanical failures, and since a conventional power station will contain many hundreds of valves, this represents a significant asset base. This paper presents a prognostic approach for estimating the remaining useful life (RUL) of valves experiencing degradation, utilizing a similarity-based method. Case study data is generated through simulation of valves within a 400MW Combined Cycle Gas Turbine power station.High fidelity industrial simulators are often produced for operator training, to allow personnel to experience fault procedures and take corrective action in safe, simulation environment, without endangering staff or equipment. This work repurposes such a high fidelity simulator to generate the type of condition monitoring data which would be produced in the presence of a fault. A first principles model of valve degradation was used to generate multiple run-to- failure events, at different degradation rates. The associated parameter data was collected to generate a library of failure cases. This set of cases was partitioned into training and test sets for prognostic modelling and the similarity based prognostic technique applied to calculate RUL. Results are presented of the technique’s accuracy, and conclusions are drawn about the applicability of the technique to this domain.

AB - Within the field of power generation, aging assets and a desire for improved maintenance decision-making tools have led to growing interest in asset prognostics. Valve failures can account for 7% or more of mechanical failures, and since a conventional power station will contain many hundreds of valves, this represents a significant asset base. This paper presents a prognostic approach for estimating the remaining useful life (RUL) of valves experiencing degradation, utilizing a similarity-based method. Case study data is generated through simulation of valves within a 400MW Combined Cycle Gas Turbine power station.High fidelity industrial simulators are often produced for operator training, to allow personnel to experience fault procedures and take corrective action in safe, simulation environment, without endangering staff or equipment. This work repurposes such a high fidelity simulator to generate the type of condition monitoring data which would be produced in the presence of a fault. A first principles model of valve degradation was used to generate multiple run-to- failure events, at different degradation rates. The associated parameter data was collected to generate a library of failure cases. This set of cases was partitioned into training and test sets for prognostic modelling and the similarity based prognostic technique applied to calculate RUL. Results are presented of the technique’s accuracy, and conclusions are drawn about the applicability of the technique to this domain.

KW - power generation

KW - decision support systems

KW - remaining useful life (RUL)

KW - prognostic modelling

KW - valve degradation

UR - http://www.phmsociety.org/node/1390

UR - http://www.phmsociety.org/events/conference/phm/14

M3 - Paper

ER -

McGhee MJ, Galloway G, Catterson V, Brown B, Harrison E. Prognostic modelling of valve degradation within power stations. 2014. Paper presented at Annual Conference of the Prognostics and Health Management Society 2014 (PHM), Fort Worth, United States.