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Experience with High Performance HMI at Two Durham WRFs · 2018-04-04 · Experience with High...
Transcript of Experience with High Performance HMI at Two Durham WRFs · 2018-04-04 · Experience with High...
Experience with High Performance HMI at Two Durham WRFsNC AWWA-WEA Annual ConferenceRaleigh Convention CenterNovember 15, 2016
John Dodson – City of DurhamDan Edwards – Hazen and Sawyer
Presenters
Presentation Outline
• Project History• New System• High Performance HMI• Implementation at Durham• Operator Experience• Benefits of HPHMI
Project History
• Major plant upgrade/expansion projects in early-mid 90’s
• New Distributed Control Systems (DCSs) for each plant
• Replaced with PLC-based systems in late 2000’s
• Tried to emulate DCS functionality and displays
• City not satisfied with result
New System
• Additional process/capacity improvements in early 2010’s
• Decision to replace Human-Machine Interface (HMI) software• Major parts of process being modified
• Planning on replacing HMI soon
• Eliminate re-work in future
• Hazen recommended City consider High Performance HMI
Traditional HMI Displays
• Original displays simple schematics
• Graduated to 3D and photos
• Admittedly visually pleasing
• Important info lost in clutter
• Numbers without context
• Alarms don’t stand out
• May not enhance situational awareness
High Performance HMI
• Accidents in the process industries• Advent of the glass cockpit in aviation• Need for better situational awareness• 2008 book “The High Performance HMI Handbook”
by Hollifield, Oliver, Habibi, and Nimmo
High Performance HMI
• Use of muted colors –no red/green
• Alarms bright red/yellow and flash
• Bar graphs with normal/alarm ranges
• Spark lines – miniature trends
• Hierarchical displays
Implementation at Durham• Incorporated requirements
into project specifications
• Required four graphic display workshops• Work through concepts before
production
• Staff buy in and comfort factor
• Collaborative team approach
• Pre-selection of control system integrator• Work under contractor
• Initially skeptical
• “Born again” converts to concepts
Summary of HPHMI Benefits• Understanding of process health “at a glance”• Quickly notice alarms• Easy access to trends• Better situational awareness• Easier, faster, more effective troubleshooting
Acknowledgements
Charlie Cocker – City of DurhamNewman Gunter – City of Durham
Questions?