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System-wide Process Controls Upgrade

System-wide Process Controls Upgrade . Detroit Water & Sewerage Department. System-wide Process Controls Upgrade. Agenda Detroit Water and Sewerage Department (DWSD) Old Control System Limitations Project Scope Design Highlights Implementation Challenges Project Results

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System-wide Process Controls Upgrade

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  1. System-wide Process Controls Upgrade Detroit Water & Sewerage Department

  2. System-wide Process Controls Upgrade Agenda • Detroit Water and Sewerage Department (DWSD) • Old Control System Limitations • Project Scope • Design Highlights • Implementation Challenges • Project Results • Moving Forward

  3. Detroit

  4. About DWSD Third largest municipal water and sewer utility in the United States Over $500 Million in revenue Provides services to more than 4 million retail and wholesale customers Service area of 1079 square miles Yellow - Wholesale Red - Retail

  5. Water Wastewater Systems DWSD System Overview • 5 Water Treatment Plants • 20 Water Booster Stations • 10 Wastewater Collection Stations • 1 Wastewater Treatment Plant • 7 CSO Basins • 13 In-system Storage Devices • 200 Remote Monitoring/Control Sites Valve, Pressure, Sewer Meter, Precipitation Gauge, CSO outfall, Dam, Level

  6. Old System Limitations • Limited monitoring due to constraints on “tone multiplexing” • Single line of communication • Limited configuration options for Operator (Trending, Alarming, Historical Reviews) • Unable to provide Equipment status and Process Alarms • Parts and repair services becoming unavailable • Extremely difficult to integrate with other control systems

  7. Background - 1964

  8. Background

  9. Background

  10. Background

  11. Project Scope • Provide system monitoring and control from a single location • Provide common equipment and functionality at all locations • Achieve economies of operation • Increase system reliability at SCC and remote facilities • Ensure continued high water quality • Ensure stable water distribution pressure • Minimize CSO events • Continue effective wastewater treatment

  12. Project Scope • Improve efficiencies of operations and maintenance personal • Maximize use of standard off-the-shelf hardware and software • Better Alarm Management • Provide Redundancy • Communication co-ordination (regular and emergency) • Provide role based security access • Provide historical database

  13. Scope Highlights • Description of new control system • System component layout (include diagram) • System Control Center video wall map • RTU types • Redundant communication description • Redundant Power sources • Historical data collection • Disaster Recovery

  14. Control System Upgrade • Implementation Process • Design workshops • Graphics workshops • Control narrative workshops • Factory Acceptance Testing • Phase over testing • System acceptance testing • Training (more than 700 people)

  15. Control System Network

  16. Primary Communication

  17. First backup Communication

  18. Secondary backup Communication Radio repeater Sites

  19. Pump Station Features • Automatic Pump Control • Auto Pump Sequencing • Communication Redundancy • Instrumentation redundancy • Detailed equipment alarms • Power redundancy

  20. Pump Station

  21. Remote monitoring site Features • Communicates to SCC and other remote sites via 900 MHz spread spectrum radios • Custom protocol for security • Can communicate to 10 other locations • Remote configuration/parameter changes capability

  22. Remote Site

  23. Implementation Challenges • Limited system access during peak season periods • Multiple System Networks • Phase-over conducted on live system • Physical relocation of Operations staff • Adaptation of Operations staff

  24. Solution

  25. Solution

  26. Solution • Better monitoring capability - • GIS based video wall map • 3600 graphics • Alarm Management • 30,000 I/O points/tags • Network diagnostics graphic • Control system diagnostics graphic

  27. Project Results • Better management of distribution systems and remote sites • Improved ability to react to rapidly changing conditions • Reduced operations and maintenance costs • Improved Alarm Management • Increased Energy Efficiency • Automated operational reports generation • Increase system availability • Implemented regulatory reports

  28. Lessons Learned • More collaboration with end users during design phase • Software upgrade strategy needed • Revision control • System security

  29. Moving Forward • Backup control center • System-wide software and hardware upgrade • Energy Management • Hydraulic Modeling Integration • Additional automated reporting • Ongoing software strategy improvements

  30. Backup Control Center

  31. Questions & Answers Detroit Water & Sewerage Department

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