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Automated transmission line inspection: how to do it?

Automated transmission line inspection: how to do it?

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The development of Artificial Intelligence (AI) has provided an enormous variety of benefits for the most diverse industries in recent years. The capability that this type of technology possesses for data processing is radically guiding the vision of the near future for task automation. Recurring activities will be the most automated, saving an important amount of economic resources and time for companies. But do you already know how AI can contribute to the energy sector, improving the inspection process of electrical transmission lines? According to the regulations that the National Electric Energy Agency (ANEEL) imposes on energy distributors in Brazil, all electrical transmission lines in the country must be inspected every six months, in order to guarantee the optimal functioning of the system and predict future problems in the networks that could affect end users. And one of the best ways to carry out this inspection is through drones. Understand now!

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Need for transmission line inspection

Failure to constantly analyze and maintain these lines harms companies economically due to fines charged by the regulatory agency. In addition, it can also cause major supply problems, resulting from the fall or shutdown of transmission lines in poor condition. However, traditional ways of performing this type of inspection, such as dispatching specialized employees and low helicopter flights, are, besides being dangerous and highly inefficient — as in the first case —, highly costly from an operational point of view — as in the second. Therefore, companies are increasingly opting for the use of new technologies that provide better results. Today, innovations such as Pix Grid, from Pix Force, utilize advances in Artificial Intelligence to perform fast and accurate inspections on the status of transmission lines in real-time, enabling a reduction in costs and mission time. AI plays a vital role in the inspection and maintenance of transmission lines. Drones equipped with cameras and sensors can capture real-time information about the status of transmission lines, allowing for effective monitoring and quick identification of problems. With the assistance of AI algorithms, captured images can be analyzed to detect defects and risk areas.

Orbital images provided by satellites are also used to monitor transmission lines in remote or difficult-to-access areas. In these cases, AI is crucial in analyzing the large volume of captured data, helping in the identification of problems and decision-making.

The use of drones and AI significantly reduces costs and increases the efficiency of inspections, minimizing the need to send crews to hazardous areas.

[caption id=”attachment_2955” align=”alignnone” width=”640”] How transmission line inspection has been improved through the use of drones[/caption]

Transmission Line Inspection Methods

Transmission line inspection is essential to ensure the safety and efficiency of the electrical grid. With advancing technologies, different methods have been adopted to identify problems before they become critical. In this context, three methods stand out: Visual Inspection, Thermographic Inspection, and Ultrasonic Inspection. Each has its own characteristics and advantages, allowing for an accurate diagnosis of line conditions.

Visual Inspection

Visual Inspection is one of the most traditional and accessible methods for monitoring transmission lines. Using binoculars, drones, or foot inspections, technicians detect visible anomalies such as corrosion, mechanical damage, and obstructions. This approach, although simple, requires a trained eye to recognize problems in structures and components. Visual Inspection is important as an initial diagnostic step before using more sophisticated technologies, ensuring that all areas of the line are regularly examined. For a long time, helicopters were widely used in visual inspections. However, drones are gradually replacing helicopters in inspections of power assets, such as transmission towers, due to their efficiency and high-quality data collection. This significantly reduces operational costs, since drones are more economical. In addition, regulatory restrictions and the high risk of helicopter operations have led utilities to explore innovative solutions.

Thermographic Inspection

Thermographic Inspection uses infrared cameras to identify hot spots in transmission lines, where there is an excessive increase in temperature caused by loose or damaged connections. This technique is efficient for detecting overloads and hidden electrical faults, which can be harmful if not resolved quickly. The advantage of Thermographic Inspection lies in its ability to perform real-time measurements, allowing maintenance teams to act before major problems occur, thus increasing the reliability of the electrical grid.

Ultrasonic Inspection

Ultrasonic Inspection is an advanced technique that uses high-frequency sound waves to detect cracks and fissures in structures and components of transmission lines. This approach offers a detailed analysis of the mechanical integrity of materials, allowing for a precise diagnosis of problems that are not visible to the naked eye. With high sensitivity, Ultrasonic Inspection is a valuable tool that contributes to preventive maintenance, helping energy companies to ensure the continuity and safety of the electricity supply.

Evolving Technologies for Inspections

With the continuous advancement of technology, transmission line inspections are becoming increasingly efficient and precise. Innovations in equipment and monitoring techniques not only improve safety, but also enable more effective predictive maintenance. Among the main evolving technologies, innovations in infrared cameras and the use of drones stand out, which facilitate access to hard-to-reach locations. These tools are revolutionizing the way inspection is carried out, contributing significantly to operational efficiency and cost reduction.

Innovations in Infrared Cameras

Infrared cameras have evolved significantly in recent years, offering higher resolution and accuracy in imaging. The new generations of cameras are capable of detecting temperature variations with high sensitivity and in real time, allowing for faster identification of issues in transmission lines. Additionally, many cameras now come equipped with automated analysis features, which generate instant reports on potential faults. This enhanced technology facilitates the early detection of anomalies, ensuring more efficient maintenance and increasing the reliability of the electrical system.

Use of Drones to Access Difficult Locations

The use of drones in transmission line inspection has revolutionized how installations are monitored. These unmanned vehicles can access hard-to-reach areas, such as tower peaks and remote regions, providing a broad and high-quality view. Equipped with cameras and sensors, drones allow for precise mapping of line conditions, reducing the time and costs associated with manual inspections. Moreover, drone operation minimizes risks to workers, ensuring a safer and more effective approach to electrical infrastructure maintenance.

Transmission Line Inspection with Drones

The inspection of power lines and substations, when done the traditional way, involves risks of accidents when climbing transmission towers, in addition to the long time required to access all of them. The proposed solution is to utilize tower inspection using drones equipped with RGB and thermal cameras, enabling image capture and automatic identification of critical points in transmission lines, such as connectors, insulators, spacers, among other components. The benefits of this solution include the identification of hot spots and damaged components, speed in the inspection process, and the reduction of costs and risks in the maintenance process. Keeping in mind that, for public utility concessionnaires, extreme power outages related to a lack of maintenance translate into significant costs, as corrective repairs of components and infrastructure can result in major revenue problems. In comparison to sending inspectors to survey and locate faults in the grid, drones, along with sensor technology and advanced data analysis, can do the same job much more efficiently, freeing up time for maintenance workers to focus on actual repairs, as they map out the key information needed for the work to be done. The faster power outages are located and repaired, the lower the outage costs will be. Drones can potentially reduce outage costs by up to 60%. Once the Pix Force team analyzes the terrain where the inspection will be performed, a drone equipped with sensors is enabled to conduct a flight in the area. Soon after, the collection of images over the lines proceeds. Subsequently, this information is stored in data clouds. Finally, it is processed by proprietary algorithms created by the team. In this way, it is possible to find patterns among the anomalies found quickly, automatically, and assertively. When this system is used, the vast majority of geographical difficulties that would make the success of the inspection procedure impossible are overcome. Thus, it is possible to have total logistical freedom when analyzing several kilometers of lines in a relatively short time. Check it out below: [caption id=”attachment_2958” align=”alignnone” width=”640”] How transmission line inspection has been improved with the use of drones[/caption] Asset management is a complex business field where concessionaires often struggle to gather data and turn it into operational insights. Asset Performance Management (APM) corresponds to an emerging field of technologies and strategies, which promises to cut costs and increase grid stability. As more and more devices, components, and units are connected to the Internet of Things (IoT), APM captures and analyzes component data to transform information into actionable insights. For utilities, this means gathering, processing, analyzing, and eventually acting proactively on grid component health information to improve operations. See how drone inspection works: https://youtu.be/u9iYgzhSfTw?si=Sg819FApPB_LXW-1

Big Data and Artificial Intelligence Solutions for Inspection

The ability to process, store, and analyze large amounts of data from a wide variety of information sources is critical for the implementation of asset performance management. Unlocking efficient data collection and analysis across multiple data sources requires a Big Data platform. In short, this means a solution capable of handling voluminous and complex datasets, quickly recognizing thousands of potential objects and errors automatically through the use of cloud architecture (cloud solutions).

Technology Integration: Communication, Sensor, and Drone

Although sensor technology is being deployed at an increasing rate in utility infrastructure, many components lack the necessary sensors or equipment to allow for remote monitoring of power grid assets. This complete sensing process does not have an attractive ROI, as 24/7 monitoring does not always bring effective gains. Thus, periodic inspections with data analysis spread the monitoring investment across multiple assets, bringing the investment to a promising level.

Benefits of Transmission Line Inspection with Drones

One of the greatest benefits of this technology is high precision. When an employee climbs a transmission tower to perform a manual inspection of the lines, they need to dedicate a considerable amount of time and effort to detect problems on a large scale. However, issues such as line wear and tear cannot always be easily found by people, as the capability of the naked eye is quite limited. On the other hand, AI systems can deeply analyze a whole variety of data and algorithms that lead to a problem detection accuracy of over 90%. Consequently, more successful missions and greater chances of predicting future problems in transmission lines are guaranteed. In fact, smart drones can analyze about 100,000 images in a few hours. The device makes use of machine learning, a system that learns to recognize digital representations of data, such as photographs, videos, and temperature collection, allowing for the analysis of multiple streams of data collected from drones. Instead of employees sifting through vast amounts of unmanageable data, an end-to-end inspection solution recognizes individual objects, such as power grid insulators, linking thermography and fault identification to geographical coordinates. They know what needs to be repaired and where. The gain in efficiency is huge. In addition, data captured by drones can significantly improve and accelerate long-term asset management for transmission line improvement and parts replacement planning. Furthermore, a detailed report on the mission is generated after data processing by the algorithms at the end of the inspection process. This enables knowledge of all the nuances involving the state of the transmission lines.

Conclusion

The implementation of drones equipped with Artificial Intelligence in electrical transmission line inspections represents a revolution in the energy sector. This approach not only ensures compliance with ANEEL regulations but also minimizes operational risks and significantly reduces costs. With methods such as visual, thermographic, and ultrasonic inspection, combined with the drones' ability to access hard-to-reach areas, companies can detect problems with high precision and agility. Innovations in data analysis and machine learning further improve the efficiency of the process, allowing for proactive management and a reduction in supply disruptions. Thus, the adoption of these technologies not only optimizes utility operations but also ensures a more reliable and secure service for consumers, promoting a more sustainable and efficient future for the electrical sector. With technology from Pix Force, companies can drastically reduce inspection costs. In addition, they ensure an efficient, fast, and effective analysis of the problems to be fixed. Learn more about our services, click here.

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Fabio Caraça

Fábio Caraça is the Chief Growth Officer at Pix Force. He leads Pix Force's transformation into a scalable SaaS operation, combining strategic vision, culture, and high-impact execution.

Safety: industrial safety with AI

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Brazil

Caldeira Institute: Tv. São José, 455, Navegantes, Porto Alegre

USA

Greentown Labs: 4200 San Jacinto St, Houston, Texas

Finland

Hiiralankaari 20 Espoo, 02160

The Pix Force brand and all its products are the property of Pix Force SA - CNPJ 25.161.678/0001-87

Copyright © 2026 Pix Force.

Newsletter

Social media

Brazil

Caldeira Institute: Tv. São José, 455, Navegantes, Porto Alegre

USA

Greentown Labs: 4200 San Jacinto St, Houston, Texas

Finland

Hiiralankaari 20 Espoo, 02160

The Pix Force brand and all its products are the property of Pix Force SA - CNPJ 25.161.678/0001-87

Copyright © 2026 Pix Force.