application of advanced diagnostic techniques for plant
TRANSCRIPT
Application of Advanced Diagnostic Techniques for Plant Performance and Availability Improvement
USAID Clean Coal International Conference 21 & 22 November 2013
Michael Fox Douglas Eakle Supervisor, Data Utilization Performance/CBM Engineer
FirstEnergy Corp. FirstEnergy Corp. IDEA Center Harrison Power Station
Ron Griebenow, P.E. Director, Energy Services
GP Strategies Corporation
• Six million customers • 18,000+ MW capacity • Operations in six states • 65,000 square mile
service territory • 20,000 miles of high-
voltage transmission • $50 billion in assets • $15 billion annual revenue • 16,500 employees
“Integrating People, Processes & Technologies”
• Performance Improvement Leader since 1966 • Servicing 1/3 of Fortune 500 • Energy, Manufacturing & Government Sectors • Headquartered in Columbia, Maryland • 3,000+ Employees in 13 countries • $400M US Revenues (2012) • NYSE: GPX
Energy Services Improving Plant & Workforce Performance
ASSET PERFORMANCE
WORKFORCE PERFORMANCE
“More than 150 Power Generation SME’s.”
HUMAN PERFORMANCE MANAGEMENT
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• FirstEnergy has utilized on-line performance monitoring since the late 1980s
• Allegheny Energy (now FirstEnergy) implemented APR for validation of on-line data in 1998
– Expanded to on-line equipment health monitoring in 2004 • Performance And Condition Monitoring included
multiple, independent systems – Each required maintenance, training and application expertise – diagnosis of a specific problem often required the subject matter
expert (SME) to switch back and forth between the systems
• Standardized on EtaPRO Suite in 2011 • Established Information Diagnostic Evaluation and
Analysis (IDEA) Center
Background
2010 2012 2004
Synergistic Technologies
THERMODYNAMIC MODELING
The EtaPRO System
Core Technologies
ANOMALY DETECTION
MACHINERY DYNAMICS
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Thermodynamic Modeling
Design Data Engineering Principles VirtualPlant™ Model
Boiler Steam Turbine Feedwater Heaters Condenser Air Heaters Steam Seal System Boiler Feed Pumps
Machinery Health Monitoring Asset Sensors Signature Processing Unit Fault Symptom Monitoring
Dynamic Sensors measured Vibration Air gap Flux Current Phase reference Semi Static Data imported Power, Active, Reactive Inlet pressure Flow Bearing and Winding Temps. etc.
Processes dynamic signals into machine signatures using advanced signal analysis techniques. Compares new data with
pre-classified references. Send changes to the
EtaPRO Predictor Server for warning, diagnosis, prediction and storage.
EtaPRO Predictor
As supplement to the alarm system, the Plot Manager provides advanced diagnostic presentation and analysis tools for fault symptom forecasting
Advanced Pattern Recognition
Asset Sensors History APR Model
Power Output Reactive Load Exhaust Temp IGV Position Inlet DP Bearing Temp Bearing Vibration Wheel Space Temps Etc.
• Concern History • Multi-concern View • Asset/Hierarchy Views • Expected Values
– APR – VirtualPlant – EtaPRO – Predictor
Concern Management
FirstEnergy Case Studies
• All Examples from Harrison Power Station – 3x650 MW Original Rated Capacity – Foster Wheeler Opposed-Wall, Coal-Fired, Supercritical Boilers – Westinghouse Single Reheat Turbines – Turbine Upgrades (~670 MW)
• Closely track issues identified, resolution and value, based on EPRI guidance – Fleet Wide Monitoring for Equipment Condition Assessment (TR-1010266,
March 2006) – On-Line Monitoring Cost-Benefit Guide (TR-1006777, November 2003)
• 2012 probability-weighted value of validated EtaPRO concerns almost $2.5 million – total potential savings exceeded $24 million – first half of 2013 (January – June) = almost $500,000
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Feedwater Heater Isolation/Bypass
EtaPRO 10.1 • May 23, 2013, EtaPRO alerted plant staff to a high feedwater heater level – Harrison Unit 2 – heater 24B
• Heater level pots "bumped" during teardown of scaffold – caused the heater to isolate – bypass valves to open – no annunciator alarm was
received in control room • Unit derate of 5 MW
– would likely have remained isolated for one week – value of the lost generation = $29,400
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Feedwater Heater Isolation/Bypass
EtaPRO 10.1 • Heater was returned to service12 hours after the initial alert – actual value returned to normal
Forced Draft (FD) Fan IB Bearing
EtaPRO 10.1 • April 11, 2013, Unit 3 B-side FD fan inboard bearing temperature increased measurably – Concern being monitored – Temperature ~25oF
higher than normal – DCS alarm point 180oF
• Boiler tube leak outage Week of July 2 – oil change – babbit material in oil – bearing rolled out – minor damage – Scraped, blued, and
returned to service
Forced Draft (FD) Fan IB Bearing
EtaPRO 10.1 • Mechanics noticed sight glass indicating normal level after draining – sight glass connection to housing plugged with dirt and sludge
• Following repair, temperature dropped ~ 15oF – Still above “normal” – no change with
continued operation – model scheduled for
tuning
Forced Draft (FD) Fan IB Bearing
EtaPRO 10.1 • Loss of the FD fan = unit derate of 300 MW • Repair would have requires at least 48 hours • Would result in lost revenue of approximately $504,000 • Conservative 10% probability, results in probability-weighted
savings of $50,400 • Excludes likely increased costs for the actual repair, had the
bearing been run to DCS alarm level or possibly to failure
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Gland Steam Temperature
EtaPRO 10.1 • Gland steam temperature not under automatic control • Requires manual valve adjustment to control gland steam
temperature – supply ~440-460oF – temp feeding LP
turbine seals ~210-220oF
– often overlooked after a plant start-up
– scheduled for DCS integration
– monitor in the meantime
Gland Steam Supply Temperature Instrument
Gland Steam to LP Temperature Instrument Gland Steam
Desuperheating Station
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Gland Steam Temperature
EtaPRO 10.1 • Tags added to existing LP steam turbine model on April 2, 2013
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Gland Steam Temperature
EtaPRO 10.1 • Alerted to high gland-steam temperature on June 3, 2013 • Predicted value
“noise” noted as modeling concern by GP Strategies Staff
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Cycle Isolation
EtaPRO 10.1 • July 7, 2012, alerted to a high drain line temperature • work order for
replacement during next unit outage
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Cycle Isolation
EtaPRO 10.1 • Valve was replaced during short outage starting late on July 13 • Drain temperature excursion immediately following unit start-
up July 18 – air solenoid
leakage – insufficient
pressure to close the valve
– solenoid replacement resolved problem
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Cycle Isolation
EtaPRO 10.1 • FirstEnergy estimated 2% of the reheat steam flow was being
dumped to the condenser – Based on the temperature, valve size and drain piping size and
length
• Thermodynamic model analysis (e.g., VirtualPlant) used to quantify the leakage effect on generation and heat rate
• Resulted in increased generating costs of $38,985 per week
Air Heater Support Bearing
EtaPRO 10.1 • July 7, 2012, alerted to a high air-heater support bearing temp • site glass indicated
normal oil level • Added oil after further
temp increase • Failure = unit trip
– Repair – 72+ hours – loss in revenue > $4M
million. • 10% probability of not being identified through other systems
• Probability-weighted benefit of $436,440
Conclusion
EtaPRO 10.1 • FirstEnergy estimates system licensing and implementation costs were recovered in less than 4 months
• Single, integrated platform has resulted in increased visibility of issues through the availability of both performance data and equipment condition anomalies on a single platform and unlimited distribution rights of client software
• Pilot installation in FirstEnergy nuclear operations (FENOC) indicates similar return on investment in nuclear stations.
• FENOC expanding equipment models for Perry Station using in-house resources and will implement throughout the nuclear fleet (four units at three sites)
Knowledge. Performance. Impact.
Questions?
Ron Griebenow, P.E. Director, Energy Services 724 Whalers Way, Suite H100 Fort Collins, CO 80525 (970) 226-0812 [email protected]