Análise da implementação do preço de liquidação das diferenças (PLD) horário no Brasil e a relação com variáveis de entrada do modelo de cálculo no horizonte de curto prazo

Abstract

The Settlement Price of Differences (PLD) is an important variable for the Free Energy Market, corresponding to base price for energy contracts that were not guaranteed in the médium-term and long-term markets. It is scheduled for 2021 the start of operation of hourly basis PLD which today is released on a weekly basis. The DESSEM program is a model developed by CEPEL and aims to determine the daily operation schedule of hydrothermal systems, including intermittent sources, with discretization of up to half hour. This model acts in coordination with DECOMP and NEWAVE models which are medium-term and long-term models to determine the dispatch and the hourly energy price for the following day. This paper presents an impact analysis of the implementation of PLD on houly basis in Brazil, which is strongly influenced by the DESSEM model, scheduled for January 2021. This implementation is seen with great importance for the electricity sector agents operating in the Free Energy Market. helps in financial planning of system operation agents and the ability to make correct management decisions in the short-term. The analysis proposed in this paper includes the identification of input variables of the models. Using these variables as a basis, use a qualitative analysis with mathematical correlations to identify the influence of weather variables and variables of the electrical system on calculation of electricity price in short-term markets.