Participation in reactive power market considering generator aging

As one of the most important ancillary services, reactive power production plays a crucial rule in power system operation, reliability and security. Because of the opportunity costs in providing reactive power, producers are under great pressure to provide VAr support. In this paper, a new challenge on the reactive capability curves (RCC) of the synchronous generator is discussed. The RCC is a graphical representation of the reactive and active power produced by the generators under various operating conditions, as specified by the cold gas pressure and temperature inside the generators as well as the power factor. These curves define the normal limits of operation without exceeding thermal limitations. The generator manufactures provide the determined RCC, However, in the real world RCC is changed over time and aging of the generators. This paper discusses about some reasons, which lead to the variations, and the importance of re-evaluation of RCC.

[1]  Wilsun Xu,et al.  An investigation on the reactive power support service needs of power producers , 2004, IEEE Transactions on Power Systems.

[2]  F.C. Huff,et al.  Optimal load dispatch based on generator reactive capability curve , 2006, 2006 IEEE Power Engineering Society General Meeting.

[3]  Geoff Klempner,et al.  Operation and Maintenance of Large Turbo-Generators: Klempner/Turbo-Generators , 2005 .

[4]  N. E. Nilsson,et al.  Evaluating the Service Degradation of Large Hydrogen Cooled Generator Rotor Fields , 1983, IEEE Transactions on Power Apparatus and Systems.

[5]  Geoff Klempner,et al.  Operation and maintenance of large turbo generators , 2004 .

[6]  S. B. Halbhavi Reactive Power Pricing Framework Problems & a proposal for a competitive market , 2012 .

[7]  D. Sales,et al.  Model for fouling deposition on power plant steam condensers cooled with seawater: Effect of water velocity and tube material , 2007 .

[8]  Robert Svoboda,et al.  Behaviour of Copper in Generator Stator Cooling-Water Systems , 2008 .

[9]  Jiuping Pan,et al.  A Procurement Market Model for Reactive Power Services Considering System Security , 2008, IEEE Transactions on Power Systems.

[10]  N. Amjady,et al.  Reactive power pricing [The Business Scene] , 2009, IEEE Power and Energy Magazine.

[11]  J. P. Hunt Capability Curves and Excitation Requirements of Saturated Cylindrical Rotor Synchronous Machines , 1967 .

[12]  C. A. Canizares,et al.  Effect of Detailed Power System Models in Traditional and Voltage Stability Constrained Optimal Power Flow Problems , 2002, IEEE Power Engineering Review.

[13]  Wen-Chen Chu,et al.  Allocating the costs of reactive power purchased in an ancillary service market by modified Y-bus matrix method , 2004, IEEE Transactions on Power Systems.

[14]  N. E. Nilsson,et al.  Synchronous generator capability curve testing and evaluation , 1994 .

[15]  M. M. Adibi,et al.  Reactive capability limitation of synchronous machines , 1994 .

[16]  Adi Soeprijanto,et al.  Generator Capability Curve Constraint for PSO Based Optimal Power Flow , 2009 .

[17]  Philip Kiameh,et al.  Power generation handbook : selection, applications, operation, and maintenance , 2003 .

[18]  Kankar Bhattacharya,et al.  Re-defining the reactive power dispatch problem in the context of competitive electricity markets , 2010, IET Generation, Transmission & Distribution.

[19]  Sadegh Vaez-Zadeh,et al.  Effect of Reactive Power Limit Modeling on Maximum System Loading and Active and Reactive Power Markets , 2010, IEEE Transactions on Power Systems.