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The Biguaçu Electrical Interconnection Project (SC) Was Auctioned in Lot 01 of the Transmission Auction Held in June 2018, with an Investment of Over R$ 440 Million
ISA CTEEP, the leader in the country’s power transmission sector, has just energized the Biguaçu Electrical Interconnection (SC), more than a year ahead of the deadline set by the National Electric Energy Agency (ANEEL). The project, unprecedented in Brazil for being the only one to encompass transmission lines with aerial, submarine, and underground sections, will ensure greater safety and reliability in the electricity supply for the metropolitan region of Florianópolis.
With construction started in the first half of 2021, the project included the construction of 57 km of transmission lines and a new Substation in Ratones, along with the expansion of the Biguaçu Substation, located in the municipality of the same name.
Watch the Institutional Video about the Biguaçu Electrical Interconnection Project
As a result, Florianópolis now has three interlinked transmission systems directly connected to the basic network, mitigating the risk of another blackout in the area, similar to the one that occurred in 2003 and lasted 55 consecutive hours. The city now follows the contingency criteria for the capitals of Brazil, which must be supplied by two or more transmission systems. Until now, the municipality had only one interlinked to the basic network.
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The project will also increase supply and improve the reliability of energy delivery for the entire Grande Florianópolis region, as well as provide greater voltage stability and operational safety and allow for the growth of renewable energy generation sources. This enhances local economic, social, and technological development, as it increases the capacity to support the growing loads resulting from the expansion of economic activities.
“The construction of this project involved numerous challenges, which were overcome through the application of innovative engineering solutions. This project, with its features of aerial, submarine, and underground lines, is unprecedented in the country. Therefore, it represents an advancement in knowledge not only for us but for the entire electric sector. We are very proud to announce the delivery of one of the most important ventures for Santa Catarina, benefiting around 508 thousand residents,” said Dayron Urrego, executive director of projects at ISA CTEEP.
The project was auctioned in Lot 01 of the transmission auction held in June 2018, with an investment of over R$ 440 million and will bring the company an additional Allowed Annual Revenue (RAP) of R$ 49.7 million in the 2022-2023 cycle. The Definitive Release Term (TLD), issued by the National System Operator (ONS), is retroactive to August 28.
Innovation and Social-Environmental Responsibility
Combining innovation with social-environmental responsibility was one of the major challenges of the Biguaçu Electrical Interconnection project, which began after obtaining the Installation Environmental License issued by the Santa Catarina Environmental Institute (IMA) in March 2021.
In the installation of the underwater section, the cables were laid in trenches executed on the seabed, with a depth of one meter, and buried with the aid of a device with water jets, a technique that minimizes the disturbance and dispersion of sediments on the seabed. The low rotation of the motor of the barge used for the laying of the armored and insulated cables was another technique applied for the protection and preservation of marine flora and fauna.
“The application of technologies for the development of underwater transmission lines paves the way for new opportunities for the transportation of offshore renewable energies,” highlights Urrego.
The underground section was designed to increase systemic reliability and minimize the interference of the transmission line in populated areas of the city, as well as presenting numerous advantages, such as protection against natural elements and less risk of power outages and maintenance, contributing to the continuity of energy supply to the local distributor and reducing the impact of the project on the population. After the completion of this section, the company rebuilt the asphalt and will carry out periodic maintenance of the access roads to the Substation and on the safety corridors.
The project also utilized drones for cable laying in the environmentally sensitive stretches of the overhead lines, and work is being conducted for the benefit of the indigenous territory of M’Biguaçu, surrounding the project, such as the construction of the Guarani Memory House and the implementation of accommodation for the reception of visitors and leaders.
Throughout the project, 630 jobs were generated, the majority of which were allocated to local labor.
Curiosities
The submarine transmission section, installed in Baía Norte, features cables weighing over 2,600 tons and is about 26 km long, equivalent to the length of the Rio-Niterói Bridge, making it the largest in South America in alternating current (which is more easily transported over long distances). This is the second submarine transmission line in Florianópolis.
About ISA CTEEP
With a team of over 1,400 employees, ISA CTEEP operates in 17 states, managing a complex transmission network through which 30% of all electricity transmitted in Brazil and 92% in the State of São Paulo flows. Its electrical system comprises over 26,000 km of circuits and 139 substations (active in operation and under construction) with voltages of up to 550 kV. Its controlling shareholder is the Colombian company ISA, which holds 35.82% of the total capital.
Via Kelly Queiroz | RPM Comunicações
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