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Final ppt

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PPT on CONGESTION ISSUES AND ITS RELATED MANAGEMENT IN POWER SYSTEM.

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Final ppt

  1. 1. CONGESTION ISSUES AND ITS RELATED MANAGEMENT IN POWER SYSTEM Presented by: Pradeep kumar bhambhoo (ELE/44/13) National Institute of Technology,Srinagar(J&K)
  2. 2. CONTENTS: • INTRODUCTION • NETWORK CONGESTION • OBJECTIVE OF CONGESTION MANAGEMENT • ISSUES WITH CONGESTION ANS IT’S EFFECT • FEATURES OF CONGESTION MANAGEMENT SCHEME • CONCLUSION • REFERENCES
  3. 3. Introduction • Conversion of Vertically integrated utilities to Open Access market system [ May 2003,Indian Electricity Act] • Because of Open Access, Congestion is prime problem for power system. • Congestion is the overloading in transmission lines. It could be caused by o unexpected outages of generation o sudden increase of load o tripping of transmission lines o failure of other equipment • Transmission congestion can cause additional outages, increase the electricity prices in some regions and can threaten system security and reliability.
  4. 4. Network Congestion: • When the producers and consumers of the electric energy desire to produce and consume in total that would cause the transmission system to operate at or beyond one or more transfer limit, the system is said to be congested. OR • Congestion is a consequence of network constraints characterizing a finite network capacity that prevent the simultaneous delivery of power from an associated set of power transactions.
  5. 5. Graph Showing Congestion: US Electricity Board(2009,RCT)
  6. 6. Objective of Congestion Management • Minimized interference of the transmission network in the market for electric energy • Secure operation of the power system • Improvement of market efficiency • Manage power flow with existing Transmission line
  7. 7. Congestion Management by FACTS devices •Congestion can be managed by Facts devices. •For efficient utilization of the existing network with penetration of additional power, FACTS devices are used. •Effective FACTS based power flow control can be applied to relieve transmission congestion & Improve the transfer capability of the network with high penetration of power. While voltage security & voltage stability constraint are satisfied & transmission net work can be effectively utilized.
  8. 8. Principle of Control • FACTS is power Electronics based system that provide dynamic control of the power transfer parameters transmission voltage, line impedance & phase angle, active and reactive power when storage becomes viable storage then they can supply & absorbed active power as well • Consider unity power factor load, real power transferred is given by: • Similarly Reactive power transferred is given by:
  9. 9. Issues With Congestion: • Thermal limit :- The maximum amount of electrical energy that transmit on transmission line without overheating. • Voltage limit :- System voltage and change in voltage must be maintained with the range of acceptable deviation. • Stability limit :- Transmission system capable of surviving disturbances through the transient and dynamic period .
  10. 10. Features of Congestion Management Scheme: • Economic efficiency • Minimum intervention • Non discriminative • Transparency • Robust
  11. 11. Conclusion • In the end by the help of following methods which can be followed so that congestion problem can be managed: • Focus on quantifying the economic risk • Designing different dispatch and curtailment strategies o Proper modelling of FACT device o Optimal placement of FACT device
  12. 12. 1. S.A.Kapharde, “Congestion management” 2. A.R Abhayankar,prof.S.A.Khaparde’ “Introduction to deregulation in power industry. 3. J.Bailek, “Tracing of the Flow of Electricity”IEE Proc-Generation, transmission, Distribution, Vol. 143, pp 313-320, July 1996. 4. G.C.Ejebe, j.Tong, J.G.Waight, J.G.Frame, X. Wang & W.F. Tinney “Available transfer capability Calculations” PE-321-PWRS-0-10-97, IEEE transaction on power system,vol-13,No.4 pp 1521 to 1527, 1998 5. Mark H. Gravener, Chika Nwankpa, Tai-sim Yeoh , “ATC computational issues” Proceedings of 32nd Hawali International Conference on system Sciences-1999 6. R.D.Christie, B.F.Wollenberg, I.Wangensteen, “Transmission management in deregulated environment” Proceeding of IEEE, 88, No.2 , pp 449-451, Feb 2000 References
  13. 13. THANK YOU

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