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Exitation System by Aqeel

Exitation System by Aqeel

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Exitation System By Aqeel Presentation Transcript

  • 1. Excitation System for an efficient and stable Power Plant and Network. Presenter: Aqeel Ahmed
  • 2. Presenter Profile
    • Aqeel Ahmed
    • (Dy. General Manager Head of ABB Pakistan
    • Southern region)
      • Academics
      • Working Experience
      • Achievements
  • 3. Contents
    • Excitation System and its place in a Power Plant
    • Functionality of Excitation System
    • Issues with Outdated Excitation Systems
    • Technology & functionality benchmark
    • Summary - Benefits of efficient Excitation System
    • Why Upgrade? A case Study
    • Conclusion and Actions
  • 4.
    • Inefficient excitation System results in
    • Inefficient Power Plant operation
    Shutdown of Excitation System / AVR = Power Plant Shutdown
  • 5. Power Station SYNCHRONOUS GENERATOR TURBINE GOVERNOR EXCITATION TRANSFORMER 2 EXCITATIONSYSTEM GENERATOR BREAKER 1 1 SYNCHRONIZING 2 PROTECTION STATIC STARTER CONTROL SYSTEMS AC & DC AUXILIARY SYSTEMS STEP UP TRANSFORMER HV- BREAKER HV SYSTEM CONTROL ROOM PT’s & CT’s AUX. TRANSF. STAR POINT CUBICLE LV SWITCHGEAR
  • 6. Functionality: Excitation systems
      • Providing variable DC current with short time overload capability
      • Controlling terminal voltage , MVAR and PF with suitable accuracy
      • Ensure stable operation with network and / or other machines
      • Contribution to transient stability subsequent to a fault.
      • Communicate with the power plant control system
      • Keep machine within allowed operating range
    Excitation systems/ A utomatic V oltage R egulators (AVRs) for Power Plants are managing: AVR Excitation Transformer Converter AC CB PT CT Controller Field Discharge
  • 7. Technology & functionality benchmark
    • Smart redundant power converter solutions for all regulation, monitoring, protection and control functions
    • Power System Stabilizer (PSS)
    • Powerful Real Time Power Plant Simulator
    • Excitation Control Terminal (ECT),
    • Communication with all leading Power plant control systems
    • Customer Benefits
    • Prolonged maintenance-free operation
    • Easy to monitor and operate
    • Easy plant integration
  • 8. Redundant and Specially designed Powerful Converters
    • Various redundancy concepts for control and power electronics
    • Power converter modules up to 4150 A and up to 6 modules in parallel
    • Insulation level to withstand stresses imposed to the field winding
    • Dynamic current sharing among parallel bridges
    • Maintenance in operation
    • Customer Benefits
    • Less outage time  High availability  Less production losses due to Power Converter failures => Higher profit
    • Less maintenance
  • 9. Vast Power System Stabilizer solutions
    • Standard IEEE 2A/2B and Multiband PSS (IEEE 4B) covering most applications
    • Adaptive PSS for changing network topology
    • Integrated and stand-alone execution
    • System study and modeling capabilities
    • Customer Benefits
    • Wide range of solutions to improve network stability
    • Pre-calculation of PSS tuning
    • PSS update of existing plants
  • 10. Powerful Real Time Power Plant Simulator
    • Factory testing with a Power Plant Simulator
    • Parameter optimizing prior to commissioning
    • AVR testing during machine overhaul
    • Customer Benefits
    • Less site tests and shorter commissioning time
    • Reduced no-load testing time and fuel costs
    • Easy training of plant staff
  • 11. Excitation Control Terminal (ECT)
    • Local and/or remote control terminal
    • Stand-alone industrial PC with color touch screen
    • Modbus TCP communication
    • Password protected access levels
    • Selectable languages
    • Customer Benefits
    • Comprehensive data acquisition and representation
    • Independent data storage
    • Simple and fast troubleshooting
  • 12. REDUCED OPERATION COSTS - Less maintenance time - Less outage time due to less component failures and efficient redundancies - Less spare parts cost - Reduced no load testing time and fuel costs HIGHER AVAILABILITY - P lant availability due to efficient redundancy & conservative margins - Support is always available BETTER CONTRIBUTION TO POWER SYSTEM STABILITY - Faster response time - Better stabilization of power oscillations Summary - Benefits of efficient Excitation System
  • 13.
      • SPARE PARTS - spare parts are not available
      • anymore - spare parts are very expensive
    • MAINTENANCE - the system needs often
    • maintenance work - maintenance lasts for several days
    • PERFORMANCE/RELIABILITY - the network is unstable - the system causes high no. of faults - insufficient support from the
    • system manufacturer
    Issues with Out dated Excitation systems
  • 14. Why upgrade? A case study
  • 15. Conclusion and Actions
    • Upcoming Power Plants
    • Investors need to ask the Power Plant supplier, which Excitation System is offered in the EPC package and the local support of the system.
    • Existing Power Plants
    • Get audit support from quality manufacturers about the performance of the excitation system and comparison with the new systems