Power System Ancillary Services

  • Juan Carlos Galvis
  • Antonio Padilha Feltrin
Part of the Energy Systems book series (ENERGY)


Ancillary services are essential for the reliably high-quality operation of a power system. These services are provided by network users and procured by the independent system operator – ISO. Due to system requirements and market structures, ancillary services are managed in different ways around the world. In this chapter, we briefly describe the definition, classification, technical requirements and economic issues of ancillary services. Particularly, we compare active power reserves and reactive support ancillary services in different systems. Finally we show two illustrative examples: A co-optimization model with AC network constraints for the energy and reserve dispatch and a modified version of this model that considers the reactive power dispatch.


Active power reserves ancillary services co-optimization dispatch power system reactive support 


  1. 1.
    Rudnick H, Barroso LA, Bezerra B (2008) A delicate balance in South America. IEEE Power Energy Mag 6(4):22–35CrossRefGoogle Scholar
  2. 2.
    Barroso LA, Cavalcanti TH, Giesbertz P, Purchala K (2005) Classification of electricity market models worldwide. CIGRE Task Force C5.2.1. Accessed 30 Oct 2009
  3. 3.
    FERC – Federal Energy Regulatory Commission (1996) Promoting wholesale competition through open-access nondiscriminatory transmission service by public utilities. Order 888.Google Scholar
  4. 4.
    Rashidinejad M, Song YH, Javidi MH (2003) Ancillary services I: pricing and procurement of reserves. In: Song Y-H, Wang X-F (eds) Operation of market-oriented power systems. Springer, LondonGoogle Scholar
  5. 5.
    Hirst E, Kirby B (1996) Electric-power ancillary services. OAK Ridge National Laboratory, Energy Division, Oak RidgeCrossRefGoogle Scholar
  6. 6.
    Rebours YG, Kirschen DS, Trotignon M, Rossingnol S (2007) A survey of frequency and voltage control ancillary services – part I: technical features. IEEE Trans Power Syst 22(1):350–357CrossRefGoogle Scholar
  7. 7.
    UCTE – Union for the Coordination of Transmission of Electricity (2004) Load-frequency control and performance: policy 1. Accessed 20 Jan 2008
  8. 8.
    NGET, Great Britain (2007) The grid code. Accessed 6 Mar 2009
  9. 9.
    Rebours YG, Kirschen DS, Trotignon M, Rossingnol S (2007) A survey of frequency and voltage control ancillary services – part II: economic features. IEEE Trans Power Syst 22(1):358–366CrossRefGoogle Scholar
  10. 10.
    Raineri R, Ríos S, Schiele D (2005) Technical and economic aspects of ancillary services markets in the electric power industry: an international comparison. Electr Power Syst Res 34(13):1540–1555Google Scholar
  11. 11.
    Granville S, Vieira FX, Pereira MVF, Marzano G, Soto J, Melo ACG, Gorenstin BG, Mello JC, Adapa R, Mansour Y, Messing L, Barry M, Bertoldi O, Doorman G, Jegouzo Y, Pruvot P, Stewart B (2001) Methods and tools for costing ancillary services. Task Force 38.05.07Google Scholar
  12. 12.
    Miguélez EL, Cortés IE, Rodríguez LR, Camino GL (2008) An overview of ancillary services in Spain. Electr Power Syst Res 78(3):3515–3523Google Scholar
  13. 13.
    Kristiansen T (2007) The Nordic approach to market-based provision of ancillary services. Electr Power Syst Res 35(7):3681–3700Google Scholar
  14. 14.
    Ministerio de Industria y Comercio (1998) Resolution of 30 Jul. 1998 (In Spanish). BOE No. 197. Accessed 5 Jan 2008
  15. 15.
    PJM (2007) Balancing operations. Manual 12. Accessed 30 Jan 2008
  16. 16.
    ONS Operador Nacional do Sistema (2002) Network procedures: minimal requirements for the connection to basic network (In Portuguese). Accessed 4 Feb 2007
  17. 17.
    CAMMESA (2007) Annex 23: frequency regulation (In Spanish). Accessed 31 Jan 2008
  18. 18.
    Ministerio de Industria y Comercio (2000) Resolution of 7 Mar. 2000 (In Spanish). BOE No. 67. Accessed 5 Jan 2008
  19. 19.
    PJM (2010) Generator operational requirements. Manual 14. Accessed 06 Aug 2010
  20. 20.
    CAMMESA (2007) Annex 4: voltage control and reactive power dispatch (In Spanish). Accessed 31 Jan 2008
  21. 21.
    Migueléz EL, Cerezo FME, Rodriguez LR (2007) On the assignment of voltage control ancillary services of generators in Spain. IEEE Trans Power Syst 22(1):367–375CrossRefGoogle Scholar
  22. 22.
    Rebours YG, Kirschen DS, Trotignon M (2007) Fundamental design issues in markets for ancillary services. The Electricity J 20(6):26–34CrossRefGoogle Scholar
  23. 23.
    Strbac G, Kirschen DS (2000) Who should pay for reserve? Electricity J 13(8):32–37CrossRefGoogle Scholar
  24. 24.
    Zhong J, Bhattacharya K (2002) Design of competitive markets for spinning reserve services. Power Eng Soc Summer Meet 3:1627–1632CrossRefGoogle Scholar
  25. 25.
    Oren SS (2001) Design of ancillary services markets. In: Proceedings of the 34th Hawaii International Conference on System Sciences, BerkeleyGoogle Scholar
  26. 26.
    Zheng D, Zhou W (2003) A design for regional ancillary services auctions markets in China. IEEE Bologna PowerTech Conf 4:5Google Scholar
  27. 27.
    Papalexopoulos A, Singh H (2001) On the various design options for ancillary services markets. In: Proceedings of the 34th Hawaii International Conference on System Sciences, BerkeleyGoogle Scholar
  28. 28.
    Shahidehpour M, Yamin H, Li Z (2002) Market operations in electric power systems. Wiley, New YorkCrossRefGoogle Scholar
  29. 29.
    Zhong J (2003) On some aspects of design of electric power ancillary service markets. PhD Thesis, Department of Electric Power Engineering Chalmers University of Technology, GöteborgGoogle Scholar
  30. 30.
    Kundur P (1993) Power system stability and control. McGraw-Hill, New YorkGoogle Scholar
  31. 31.
    Rabiee A, Shayanfar HA, Amjady N (2009) Reactive power pricing: problems & proposal for a competitive market. IEEE Power Energy Mag, Vol. 7, 18–32CrossRefGoogle Scholar
  32. 32.
    ONS Operador Nacional do Sistema (2003) Commercial arrangement for ancillary services provided from generators, transmission and distribution agents (In Portuguese). Accessed 24 Jan 2008
  33. 33.
    Havel P, Horáček P, Černý V, Fantík J (2008) Optimal planning of ancillary services for reliable power balance control. IEEE Trans Power Syst 23(3):1375–1382CrossRefGoogle Scholar
  34. 34.
    Verbić G, Gubina F (2004) Cost-based models for the power-reserve pricing of frequency control. IEEE Trans Power Syst 19(4):1853–1858CrossRefGoogle Scholar
  35. 35.
    Sousa T, Jardini JA, Masuda M, de Lima RA (2004) Spinning reserve service pricing in hydroelectric power plants. In: IEEE/PES Transmission and Distribution Conference and Exposition, Latin AmericaGoogle Scholar
  36. 36.
    Sousa T, Tahan CMV, Jardini JA, Rosa JAO, Feltrin AP, Manso JCG (2010) A new approach to remuneration of ancillary services provided by generation agents in Brazil. IEEE Latin America Trans 8(1):38–44CrossRefGoogle Scholar
  37. 37.
    García-González J, Roque AMS, Campos FA, Villar J (2007) Connecting the intraday energy and reserve markets by an optimal redispatch. IEEE Trans Power Syst 22(4):2220–2231CrossRefGoogle Scholar
  38. 38.
    Brien L (1999) Why the ancillary services markets don’t work and what to do about it. Electricity J 12(5):38–48CrossRefGoogle Scholar
  39. 39.
    Costa AL, Costa AS (2007) Energy and ancillary service dispatch through dynamic optimal power flow. Electr Power Syst Res 77(8):1047–1055CrossRefGoogle Scholar
  40. 40.
    Ongsakul W, Chayakulkheeree K (2006) Coordinated fuzzy constrained optimal power dispatch for bilateral contract, balancing electricity, and ancillary services markets. IEEE Trans Power Syst 21(2):593–604CrossRefGoogle Scholar
  41. 41.
    Arroyo JM, Galiana FD (2005) Energy and reserve pricing in security and network-constrained electricity markets. IEEE Trans Power Syst 20(2):634–643CrossRefGoogle Scholar
  42. 42.
    Jaefari-Nokandi M, Monsef H (2009) Scheduling of spinning reserve considering customer choice on reliability. IEEE Trans Power Syst 24(4):1780–1789CrossRefGoogle Scholar
  43. 43.
    Wong S, Fuller JD (2007) Pricing energy and reserves using stochastic optimization in an alternative electricity market. IEEE Trans Power Syst 22(2):631–638CrossRefGoogle Scholar
  44. 44.
    Wang J, Wang X, Wu Y (2005) Operating reserve model in the power market. IEEE Trans Power Syst 20(1):223–229CrossRefGoogle Scholar
  45. 45.
    Amjady N, Aghaei J, Shayanfar HA (2009) Stochastic multiobjective market clearing of joint energy and reserve auctions ensuring power system security. IEEE Trans Power Syst 24(4):1841–1854CrossRefGoogle Scholar
  46. 46.
    Cheung KW, Shamsollahi P, Sun D, Milligan J, Potishnak M (2000) Energy and ancillary service dispatch for the interim ISO New England electricity market. IEEE Trans Power Syst 15(3):968–974CrossRefGoogle Scholar
  47. 47.
    Arroyo JM, Conejo AJ (2002) Optimal response of a power generator to energy, AGC, and reserve pool-based markets. IEEE Trans Power Syst 17(2):404–410CrossRefGoogle Scholar
  48. 48.
    Wen FS, David AK (2002) Optimally co-ordinated bidding strategies in energy and ancillary service markets. IEE Proc Gener Transm Distrib 149(3):331–338CrossRefGoogle Scholar
  49. 49.
    Ren Y, Galiana FD (2004) Pay-as-bid versus marginal pricing – part I: strategic generator offers. IEEE Trans Power Syst 19(4):1771–1776CrossRefGoogle Scholar
  50. 50.
    Ren Y, Galiana FD (2004) Pay-as-bid versus marginal pricing – part II: market behavior under strategic generator offers. IEEE Trans Power Syst 19(4):1777–1783CrossRefGoogle Scholar
  51. 51.
    Stoft S (2002) Power system economics: designing markets for electricity. Wiley, New YorkCrossRefGoogle Scholar
  52. 52.
    Ruiz PA, Sauer PW (2008) Spinning contingency reserve: economic value and demand functions. IEEE Trans Power Syst 23(3):1071–1078CrossRefGoogle Scholar
  53. 53.
    Bai J, Gooi HB, Xia LM, Strbac G, Venkatesh B (2006) A probabilistic reserve market incorporating interruptible load. IEEE Trans Power Syst 21(3):1079–1087CrossRefGoogle Scholar
  54. 54.
    Jazayeri P, Schellenberg A, Rosehart WD, Doudna J, Widergren S, Lawrence D, Mickey J, Jones S (2005) A survey of load control programs for price and system stability. IEEE Trans Power Syst 20(3):1504–1509CrossRefGoogle Scholar
  55. 55.
    Tyagi B, Srisvastava SC (2006) A decentralized automatic generation control scheme for competitive electricity markets. IEEE Trans Power Syst 21(1):312–320CrossRefGoogle Scholar
  56. 56.
    Zhong Jin, Bhattacharya Kankar (2003) Frequency linked pricing as an instrument for frequency regulation in deregulated electricity markets. Power Engineering Society General Meeting, Göteborg SwedenGoogle Scholar
  57. 57.
    Christie RD, Bose A (1996) Load frequency control issues in power system operations after deregulation. IEEE Trans Power Syst 11(3):1191–1200CrossRefGoogle Scholar
  58. 58.
    Cañizares C, Bhattacharya K, El-Samahy I, Haghighat H, Pan J, Tang C (2010) Re-defining the reactive power dispatch problem in the context of competitive electricity markets. IET Gener Transm Distrib 4(2):162–177CrossRefGoogle Scholar
  59. 59.
    Swider DJ (2007) Efficient scoring-rule in multipart procurement auctions for power systems reserve. IEEE Trans Power Syst 22(4):1717–1725CrossRefGoogle Scholar
  60. 60.
    Dommel HW, Tinney WF (1968) Optimal power flow solutions. IEEE Trans PAS 87(10):1866–1876CrossRefGoogle Scholar
  61. 61.
    Lin XJ, Yu CW, Chung CY (2005) Pricing of reactive support ancillary services. IEEE Proc-Gener Transm Distrib 152(5):616–622CrossRefGoogle Scholar
  62. 62.
    Hao S, Papalexopoulos A (1997) Reactive power pricing and management. IEEE Trans Power Syst 12(1):95–104CrossRefGoogle Scholar
  63. 63.
    PSERC (2001) Reactive power support services in electricity markets. Power System Engineering Research Center. Accessed 4 Mar 2009
  64. 64.
    El-Samahy I, Bhattacharya K, Cañizares C, Anjos MF, Pan J (2008) A procurement market for reactive power services considering system security. IEEE Trans Power Syst 23(1):137–149CrossRefGoogle Scholar
  65. 65.
    Chicco G, Gross G (2008) Current issues in reactive power management: a critical overview. In: IEEE power and energy society general meeting, Pittsburgh, pp 1–6Google Scholar
  66. 66.
    Frías P, Gómez T, Soler D (2008) A reactive power capacity market using annual auctions. IEEE Trans Power Syst 23(3):1458–1459CrossRefGoogle Scholar
  67. 67.
    Zhong J, Nobile E, Bose A, Bhattacharya K (2004) Localized reactive power markets using the concept of voltage control areas. IEEE Trans Power Syst 19(3):1555–1561CrossRefGoogle Scholar
  68. 68.
    Chitkara P, Zhong J, Bhattacharya K (2008) Oligopolistic competition of gencos in reactive power ancillary service provisions. IEEE Trans Power Syst 24(3):1256–1265CrossRefGoogle Scholar
  69. 69.
    Feng D, Zhong J, Gan D (2008) Reactive market power analysis using must-run indices. IEEE Trans Power Syst 23(2):755–765CrossRefGoogle Scholar
  70. 70.
    Taylor GA, Phichaisawat S, Irving MR, Song Y-H (2003) Ancillary services II: voltage security and reactive power management. In: Yong-Hua S, Xi-Fan W (eds) Operation of market-oriented power systems. Springer, LondonGoogle Scholar
  71. 71.
    Bhattacharya K, Zhong J (2001) Reactive power as an ancillary service. IEEE Trans Power Syst 16(2):294–300CrossRefGoogle Scholar
  72. 72.
    CAMMESA (2007) Annex 36: Sort and medium term reserve services (In Spanish). Accessed 31 Jan 2008
  73. 73.
    Zhong J, Bhattacharya K (2002) Toward a competitive market for reactive power. IEEE Trans Power Syst 17(4):1206–1215CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Juan Carlos Galvis
    • 1
  • Antonio Padilha Feltrin
    • 1
  1. 1.UNESPIlha SolteiraBrazil

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