Portal de Periódicos da CAPES

Valorização de serviços ancilares de reserva em geradores hidrelétricos

2010; Linguagem: Inglês

2639-6459

Galvis Manso, Juan Carlos,

Fiscal Policy and Economic Growth

This work presents a reserve ancillary services pricing research. Particularly, the reserve that is used for frequency regulation and that is provided by hydroelectric generators. The development of pricing methodologies, that show real reserve delivery costs, is the main target of this project. Ancillary services pricing procures incentives to motivate agents to take responsibilities in the service supply and ensuring an appropriated remuneration. This pricing is based on the use and availability costs of reserve; under an economic and reliable system operation. In order to do that, firstly an overview of technical characteristics and pricing methods of the ancillary services in different systems is presented. Then, in order to fit this pricing methodology to the corresponding regulation, commercialization and operation rules, an introduction of the Brazilian electrical sector is realized. Next, two reserve ancillary services pricing methods are presented. The first one considers a hydraulic generator point of view. In this case, the aim is to set up the real value of the services by mean of a generator costs analysis. These costs include, basically, availability and use costs. Inside these cost components, efficiency costs are highlighted, and a single generator unit commitment dispatch is used to calculate them. This proposal is applied to calculate the ancillary service reserve costs in the Ilha Solteira hydroelectric generator, using data from the Companhia Energetica of Sao Paulo (CESP). The second pricing method considers the operator system point of view, under a market environment. In these circumstances, agents are free to set up a price offer for the availability of the reserve. To attribute the reserve, an optimal hydroelectric dispatch is used, considering electrical and hydraulic constraints. This methodology is tested in two systems. The first one represents a didactic three bus three generator system, for illustrative purposes. The second one represents the South-East Brazilian system that is used to simulate the market operation considering the interaction among Brazilian agents. Finally, the conclusions of the project and some suggestions for future works are exposed.