Equivalente da rede elétrica de distribuição cearense: um estudo de variação de tensão em regime permanente na conexão de novos clientes no regional Cauípe

Abstract

This work aims to use network equivalent to evaluate the impact on steady-state voltage, caused by the connection of new electrical energy loads to the high voltage distribution network of the company ENEL Distribuição Ceará. Given the advance of technology, the development of tools to enable studies in the Electric Power System (EPS) has become fundamental, and the computational cost has become a determining factor for these analyses. To ensure the quality of electric power supply, many studies were conducted to certify the strength of the power grid and the assertiveness of large customers connections. The simulators of the Electric Energy Research Center (CEPEL) are great allies in the development of studies for the specificities of the Brazilian EPS. In this paper, the Network Analysis Program (ANAREDE) software was used, given the characteristics of the study, which focused on the behavior of the steady state network. Aiming to summarize the connection study area and to guarantee the minimum steady state voltage impact caused by the connection of new customers and new generators in the Ceará's power grid, a reduced model (network equivalent) of the high voltage distribution network and medium voltage buses in the State of Ceará was developed, more precisely the Cauipe regional's. Studies were conducted in 3 different load levels for working days, in order to guarantee the efficiency of the network equivalent. In order to study the impacts of the connection of a new 69 kV customer in July 2022 in the regional, several connection scenarios were built to identify the most suitable Distribution Substation (SED) to receive this connection and the impact of generators (already existing) on the main sections of each SED, given new loads connections' scenarios.