Exitation System By Aqeel

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Exitation System by Aqeel

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Exitation System By Aqeel

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Issues with Outdated Excitation Systems 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

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