CTEEP Companhia de Transmissão de Energia Eletrica Paulista S A : ISA CTEEP starts work on the underwater segment of the Biguaçu Electric Interconnection, in Santa Catarina

ISA CTEEP starts work on the underwater segment of the Biguaçu Electric Interconnection, in Santa Catarina

• With the project, Florianópolis now has three transmission systems, reducing the risk of interruption in the energy supply, due to the installation of two 230 kV circuits;
• The segment of the underwater line has an average length of 13 km crossing the continent to the Island of Santa Catarina;
• The expectation is to hire around 230 local professionals throughout the project;
• Social and environmental responsibility is a priority with the use of measures that reduce impacts and enable the continuity of important activities, such as fishing.

São Paulo, 31 March 2021 - This week, ISA CTEEP, private energy transmission company, is staring the underwater segment in the North Bay (Baía do Norte, in Portuguese) of Biguaçu Electric Interconnection (IE), located in the state of Santa Catarina, after obtaining the Environment Installation License issued by Santa Catarina Environment State (IMA). The investment of the National Electric Energy Agency (ANEEL) for the entire project is R$ 641 million and the deadline stipulated by the regulator for energization is September 2023.

The project, awarded in lot 01 of the transmission auction held in June 2018, includes the expansion of a substation and the construction of an additional one and a 230 kV transmission line with two 28 km circuits, including overhead, underwater and underground segments.

The work aims at greater safety and reliability in the supply of electricity in the metropolitan region of Florianópolis, mitigating the risk of another blackout, as in 2003 and which lasted 55 consecutive hours. With the increase in the supply of energy for the entire region, the project will expand the economic, social and technological development of the State, in addition to attracting new projects to Santa Catarina, supporting the increase in loads resulting from the expansion of economic activities in the region.

'Following the contingency criterion of the capitals of Brazil, Florianópolis must be supplied by two or more transmission systems. Currently, the municipality has only one interconnected to the basic grid. With IE Biguaçu, there will be three, avoiding the interruption of the energy supply, in case of the ceasing operations of the existing circuits', explains Dayron Urrego, executive project officer at ISA CTEEP.

Socio-environmental operation and responsibility
For the implementation of the transmission line in the submarine segment, six conducting cables, with an average length of 13 km, will be used in ditches executed in the seabed, with a depth of one meter, from the beach in Biguaçu.

Then, the cables will be grounded with the aid of a device with water jets, a technique that minimizes the turning and the dispersion of sediments. In addition, the company will apply other preservation techniques, such as the low engine speed of the raft and the use of shielded and insulated cables. At the end of the work, an evaluation of the restoration of the morphological conditions of the bed will be carried out after the implantation of the cables in the North Bay.

During the entire period of installation of the transmission line of this segment, the company will use two rafts, one for launching the cables (75 meters long and 25 meters wide) and the other for grounding (21 meters long and 6.5 meters long width), besides issuing the warning to the navigators through the Port Authority and maintaining support boats to guarantee the safety zone of the raft - more than 3 km - and monitoring by specialists in loco and drones that will enable the continuation of important activities, such as fishing.

For the execution of the project, the company expects to hire around 230 local professionals. So far, 140 have been hired.

Route of the underwater segment of the transmission line

About ISA CTEEP
With a staff comprising around 1,400 employees, ISA CTEEP is present in 17 Brazilian states, operating a complex transmission grid, responsible for the flowing of 33% of all electricity consumed in the country, and 94% of the State of São Paulo. Its electric system comprises over 20 thousand kilometers of transmission lines and 140 substations (in operation and under construction). The Company was privatized in 2006, and its controlling shareholder is ISA Group, holding 35.82% of the total capital.
Media Information

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