Análise da metodologia aplicada às tarifas de uso dos sistemas de distribuição para geradores - TUSDg
Since the free access regulation for the transmission and distribution power systems, the use of the networks is permited taking into account an appropriate charge, in order to compensate part of the systems cost to the grid owners. Electrical sector reforms, including the free access regulation, aim at to satisfy the electricity demand expansion that happened in consequence of the Brazilian electricity market liberalization, promoting competition between agents. Along with the free access, the
... he free access, the need for efficient methods for establishing the transmission and distribution use of system's charge has emerged, aiming at to promote the rational access to the transmission and distribution networks, in order to minimize the expansion investments and to optimize the National Interconnected System and distribution grids operation. The methodology to calculate the TUOS charge (Transmission use of system charge) has been defined to show the individual impact caused by the net's users, and the DUOS charge (Distribution use of system charge) to compensate expansion costs in each network voltage level. However, the DUOS charge excluded the generation sector, that was charged by the smallest value of consumer's sector, or by their average of regional values. The methodology for the calculation of the Duos Charge used since 1999 was considered provisory and has caused distortions in the economic sign and also in the competitiveness between the agents. Furthermore, it didn't encourage the generator agents to look for the better access points in distribution systems. In January this year, the Brazilian Electricity Regulatory Agency (ANEEL, in Portuguese initials) has defined another methodology to calculate the DUOS charge for generating agents in order to correct such distortions. This work analyses the new methodology, discussing its main characteristics and presenting another option to calculate the DUOS charge for generation plants, aiming at the same purpose.