Hybrid Control System for Managing Voltage and Reactive Power in the JEJU Power System

  • Seo, Sang-Soo ;
  • Choi, Yun-Hyuk ;
  • Kang, Sang-Gyun ;
  • Lee, Byong-Jun ;
  • Shin, Jeong-Hoon ;
  • Kim, Tae-Kyun
  • Published : 2009.12.01


This paper proposes a hybrid voltage controller based on a hierarchical control structure for implementation in the Jeju power system. The hybrid voltage controller utilizes the coordination of various reactive power devices such as generators, switched shunt devices and LTC to regulate the pilot voltage of an area or zone. The reactive power source can be classified into two groups based on action characteristics, namely continuous and discrete. The controller, which regulates the pilot bus voltage, reflects these characteristics in the coordination of the two types of reactive power source. However, the continuous type source like generators is a more important source than the discrete type for an emergency state such as a voltage collapse, thereby requiring a more reactive power reserve of the continuous type to be utilized in the coordination in order to regulate the pilot bus voltage. Results show that the hybrid controller, when compared to conventional methods, has a considerable improvement in performance when adopted to control the pilot bus voltage of the Jeju island system.


voltage/reactive power control;hybrid control;hierarchical control;optimal control;pilot bus;sensitivity matrix;cost function


  1. S.G. Kang, S.S. Seo, B. Lee, J.Y. Joo, and J.C. Bae, 'A Study on the Determination of Generation Limits in the Jeju System Using Generation Continuation Power Flow(GCPF)', Security and Reliability of Electric Power Systems CIGRE Regional Meeting, June 18-20, 2007, Tallinn, Estonia
  2. S. Corsi, P. Marannino, N. Losignore, and G. Moreschini, ' Coordination Between the Reactive Power Scheduling Function and the Hierarchical Vo1tage Control of the EHV ENEL System', IEEE Transactions on Power Systems, Vol. 10, No. 2, pp. 686-694, May 1995
  3. S. Corsi, 'The Secondary Voltage Regulation in Italy', IEEEIPES 2000 Summer Meeting, July 16-20, Seattle, Washington
  4. S. Corsi, M. Pozzi, C. Sabelli, and A. Serrani, 'The Coordinated Automatic Voltage Contro1 of the lta1ian Transmission Grid - Part 1: Reasons of the Choice and Overview of the Conso1idated Hierarchical System', IEEE Transactions on Power Systems, Vol. 19, No. 4, pp. 1723-1732, Nov. 2004
  5. S. Corsi, M. Pozzi, C. Sabelli, and A. Serrani, 'The Coordinated Automatic Voltage Contro1 of the ltalian Transmission Grid - Part II: Control Apparatusεs and Fie1d Performance of the Conso1idated Hierarchical System', IEEE Transactions on Power Systems, Vol. 19, No. 4, pp. 1733-1741, Nov. 2004
  6. J. L. Sancha, J. L. Femandez, A. Cortes, and J. T. Abarca, 'Secondary Voltage Control: Analysis, Solution and Simu1ation Results for the Spanish Transmission System', IEEE Trans. on Power Systems, Vol. 11, No. 2, pp. 630-638, May 1996
  7. J.P. Paul, J. T. Leost, and J.M. Tesseron, ' Survey of the Secondary Voltage Control in France: Present Realization and Investigations', IEEE Transactions on Power Systems, Vol. PWRS-2, No. 2, pp. 505-511, May 1987
  8. P. Lagonotte, J.C. Sabonnadiere, J.Y. Leost and J.P. Paul (EDF), ' Structural Analysis of the E1ectrical System: Application to Secondary Voltage Control in France', IEEE Transaction on Power Systems, Vol. 4, No. 2, pp. 479-484, May 1989
  9. Marija D. Ilic, Xiaojun Liu, Gilbert Leung, Micheal Athans, Christine Vialas, and Patrick Pruvot, ' Improved Sεcondary and New Tertiary Voltage Control', IEEE Transactions on Power Systems, Vol. 10, No. 4, pp. 1851-1862, Nov. 1995
  10. H. Vu, P. Pruvot, C. Launay, Y. Harmand, 'An Improved Voltage Control on Large Sca1e Power System', IEEE Transactions on Power Systems, Vol. 11, No. 3, pp. 1295-1303, Aug. 1996
  11. Sergio Granville, ' Optimal Reactive Dispatch through Interior Point Methods', IEEE Transactions on Power Systems, Vol. 9, No. 1, pp. 136-146, Feb. 1994
  12. M. J. O ’Grady, W. T. Briggs, and W. O. Stadlin, 'Managing Power System Security and Optimization', IEEE Computer Applications in Power, Vol. 7, No. 4, pp. 50-55, Oct, 1994
  13. A. Zobian, M. Ilic, 'A Steady State Voltage Monitoring and Contro1 Algorithm Using Localized Least Square Minimization of Load Vo1tage Deviations', IEEE Transactions on Power Systems, Vol. 11, No. 2, pp. 929-938, May 1996
  14. C. Yu, Y. T. Yoon, M. Ilic, and A. Catelli, 'On-line Vo1tage Rεgulation: The Case of New Eng1and', IEEE Transactions on Power Systems, Vol. 14, No. 4, pp. 1477-1484, Nov. 1999
  15. T.K. Kim, Y.H. Choi, S.S. Seo, and B.J. Lee, 'A Study on Voltage and Reactive Power Control Methodology using Intεger Programming and Local Subsystem', The Transactions of the Korean Institute Electrical Engineers (KIEE), Vol. 57, No. 4, pp. 543-550, April 2008
  16. Yonghong Chen, 'Development of Automatic Slow Voltage Control for Large Power System', Ph.D. dissertation, Washington State University, 2001
  17. Jingdong Su, and Vaithianathan Mani Venkatasubramanian, 'A Hybrid On-line Slow Voltage Control Scheme for Large Power Systems', Bulk Power System Dynamics and Control- VII, August 19-24, 2007, Charleston, South Carolina, USA
  18. C.W. Taylor, Power System Voltage Stability, McGraw-Hill Inc., 1994
  19. T. V. Cutsem, and C. Voumas, Voltage Stability of Electric Power Systems, Kluwer Academic Publishers, 1998
  20. M. Ilic, S. Liu, Hierarchical Power System Control, Springer,1996

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