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POWER TRANSMISSION

OPERATION, MAINTENANCE AND ENGINEERING FOR HIGH AND EXTRA-HIGH VOLTAGE SYSTEMS

O&M ENGINEERING FOR POWER TRANSMISSION

COTESA works on transmission assets with operation, maintenance and engineering solutions for lines, substations and high and extra-high voltage systems connected to Brazil’s Basic Grid, at voltages up to 600 kV.

The setup includes a 24/7 System Operations Center, pre- and post-operation, real-time operation, maintenance planning, indicator management, regulatory support and specialised crews for routine, contingency and high-complexity interventions.

We perform live-line work up to 765 kV and keep local crews on site at the plants, monitoring deviations and escalating action at management and strategic level.

Live-line maintenance on a transmission tower
0THOUSAND KM
OF TRANSMISSION LINES
HIGH AND EXTRA-HIGH VOLTAGE
0
SUBSTATIONS CONNECTED
TO THE NATIONAL GRID
0
POWER
TRANSFORMERS
0
COMPENSATORS

TECHNICAL AND REGULATORY DEMANDS OF TRANSMISSION

The requirement for high availability and reliability of transmission assets.

The complexity of interfacing with the grid operator (ONS), the regulator (ANEEL), connected agents and network procedures.

The need for remote and on-site operation, outage management and emergency response.

Technical, regulatory and financial exposure from failures, unavailability or critical events.

KEY DELIVERABLES

OPERATIONS

  • On-site and remote asset operation
  • Pre-operation, post-operation and real-time operation
  • Standardisation and switching plans
  • Support for contingencies and emergencies

MAINTENANCE

  • Annual planning of preventive and predictive maintenance
  • Transmission line maintenance
  • Substation and equipment maintenance
  • Technical inspections and incident analysis

ENGINEERING AND REGULATORY

  • Protection, control, automation and telecommunications
  • Oscillography analysis and protection performance
  • KPI management and operational reporting
  • Challenge and defence of performance / Variable Portion (PV), where applicable
TECHNICAL AUTHORITY

EXPERIENCE IN COMPLEX SYSTEMS

Transmission is the core of COTESA’s technical authority. Our central engineering team sets standards and procedures, analyses field results and backs operating decisions, from daily routine to the most critical incidents.

We work across high and extra-high voltage, with experience in complex systems such as 525 kV substations and HVDC links up to 600 kV.

SEE OUR SPECIAL SERVICES

WHY COTESA

  • 24/7 OPERATIONS CENTER
    HOTLINE CONNECTION TO ALL FOUR REGIONAL CENTERS OF THE NATIONAL GRID OPERATOR
  • LIVE-LINE UP TO 765 KV
    INTERVENTIONS WITH THE SYSTEM ENERGISED, WITHOUT TAKING IT OFFLINE
  • HVDC UP TO 600 KV
    EXPERIENCE IN DIRECT-CURRENT LINKS AND IN 525 KV SUBSTATIONS
  • REDUNDANT TELECOM
    INFRASTRUCTURE ALIGNED WITH THE SECTOR’S OPERATIONAL AND TELECOM REQUIREMENTS

TRANSMISSION IN THE FIELD

Live-line work, inspections and maintenance on the transmission lines and substations operated by COTESA.

FREQUENTLY ASKED QUESTIONS ON TRANSMISSION

On high and extra-high voltage assets connected to Brazil’s Basic Grid, including maintenance performed live-line up to 765 kV, with the system energised, a technique COTESA pioneered in Brazil. The company has experience in complex systems such as 525 kV substations and HVDC links up to 600 kV.
COTESA provides operations engineering, representing its clients before the grid operator (ONS), the regulator (ANEEL) and other authorities, with a hotline connection to Brazil’s four regional operations centers (South, Southeast, North/Central-West and Northeast).
Yes. The company supports the challenge and defence of performance and of the Variable Portion (PV) where applicable, a Brazilian regulatory deduction applied for asset unavailability. This includes incident analysis, oscillography and the technical documentation needed to sustain the case before the parties involved.
Maintenance of transmission lines, substations and equipment in predictive, preventive and corrective modes, with local crews on site, technical inspections, incident analysis and support for contingencies and emergencies.

BRING MORE EXPERTISE, CONTROL AND RESPONSIVENESS
TO YOUR TRANSMISSION ASSETS

Talk to the people who operate high and extra-high voltage lines and substations every day.

TALK TO THE TRANSMISSION TEAM