یک روش جایگزین برای پیمانکاری برق: درسهایی از مزایده تامین تجهیزات برق برزیل تجربه

An innovative methodology to contract capacity employs an index designed to allow comparison among the expected generation costs of electricity from different types of fuel sources. An analysis shows, however, that the methodology presents distortions that favor the competitiveness of power plants with higher variable costs, and also that it is subject to endogenous choices of the auctioneer, with huge differences between auction numbers and performed numbers.

Market capacity has proven to be the most controversial element in electricity restructuring models (Cramton and Stoft, 2007, p. 43), and so there are different approaches in how to find equilibrium between security, reliability and the economic efficiency of the system. Percentage of avoided cost, portfolio theory, assigning a fixed diversity or a relative weight for fuel diversity are some of these approaches. Using a method that is closer to percentage of avoided cost, Brazilian power procurement auctions adopted a scoring rule based on the expected generation cost of electricity (fixed plus variable costs) from different types of thermoelectric sources by the application of the Benefit Cost Index (BCI).