Reliable Power. Intelligent Protection.
Infrared Thermal Imaging Solutions for the Power Generation Industry
Overview
Power generation, as the upstream segment of the power industry value chain, encompasses a wide range of generation methods, including thermal, hydropower, wind, photovoltaic (PV), and nuclear power. It involves diverse types of equipment, complex operating conditions, and extremely stringent safety requirements. Critical assets such as generators, excitation systems, and PV arrays operate continuously under harsh conditions characterized by high voltage, high current, and elevated temperatures. Equipment aging, loose electrical connections, insulation degradation, and localized overheating can all lead to unplanned outages or even major safety incidents. As the development of next-generation power systems accelerates and the installed capacity of renewable energy continues to expand, traditional manual inspection methods are no longer sufficient to meet today's increasingly demanding requirements for safe and efficient operation and maintenance.
Infrared thermal imaging technology offers unique advantages, including long-range, non-contact temperature measurement, real-time visualization, and around-the-clock monitoring. It can accurately detect subtle temperature rises during equipment operation, enabling potential faults to be identified and addressed at an early stage before they escalate. As a result, it establishes a robust digital line of defense for the safe and reliable operation of power generation systems.
Infrared thermal imaging technology offers unique advantages, including long-range, non-contact temperature measurement, real-time visualization, and around-the-clock monitoring. It can accurately detect subtle temperature rises during equipment operation, enabling potential faults to be identified and addressed at an early stage before they escalate. As a result, it establishes a robust digital line of defense for the safe and reliable operation of power generation systems.
PV Panel Inspection
Background
As the global energy transition accelerates and countries around the world advance their net-zero emissions goals, the installed capacity of photovoltaic (PV) power generation continues to grow rapidly. During long-term outdoor operation, PV modules are highly susceptible to the formation of hot spots caused by shading, microcracks, poor solder joints, and loose electrical connections. Hot spot areas operate at temperatures significantly higher than those of normal modules, which not only substantially reduces power generation efficiency but, in severe cases, can also lead to module burnout or even fire.
Pain Points
- Low Manual Inspection Efficiency
- Hot Spots Are Difficult to Detect with the Naked Eye
- Delayed Fault Detection and Response
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Solution
To meet the inspection requirements of PV systems, infrared thermal imaging cameras are recommended for routine inspections and detailed temperature analysis of critical areas or suspicious PV modules. Thermal images provide a clear visualization of the severity of hot spots and enable precise localization of the affected modules.
High Inspection Efficiency: Full-area coverage with significantly improved inspection efficiency.
Precise Fault Localization: Intuitive thermal visualization enables highly accurate fault identification.
Predictive Maintenance: Detect and address hot spot risks before failures occur.
Power Generation Losses Reduction: Maximize energy yield and improve overall investment.
Generator Temperature Monitoring
Background
The generator is a core asset in a power plant and is susceptible to multiple factors such as mechanical vibration and electrical load fluctuations, which can lead to overheating, cracking, looseness, and other faults. In addition, critical components such as electrical connections and insulators are also prone to heat buildup caused by poor contact or insulation degradation.
Pain Points
- Continuous, real-time monitoring of critical components is difficult to achieve through manual inspection.
- Early-stage faults such as poor electrical contact often produce only subtle temperature rises, making them easy to overlook when relying on experience alone.
- Under challenging operating conditions, effective temperature visualization methods are lacking for accurate condition assessment.
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Solution
For the temperature monitoring of critical generator components, a handheld thermal camera is recommended for routine inspections. The thermal camera clearly displays the temperature distribution of each component, enabling the rapid identification of abnormal hot spots through temperature difference comparison. It also automatically marks the highest-temperature point, providing operation and maintenance personnel with an accurate basis for maintenance decision-making.
Non-stop Inspection: Perform comprehensive scanning while the generator remains in operation, ensuring uninterrupted power generation.
Fast and Comprehensive: Cover all critical components in a single inspection, significantly reducing inspection time.
Precise Fault Localization: Thermal images intuitively display the temperature distribution, ensuring that localized hot spots are not overlooked.
Disconnecting Switches Inspection
Background
Disconnecting switches are critical components in power systems, responsible for circuit switching and electrical isolation. Due to frequent opening and closing operations over long periods, the contacts and contact clamps are prone to oxidation, loosening, or contamination buildup, resulting in increased contact resistance. When high currents pass through these contact points, they can heat up rapidly, creating a risk of overheating.
Pain Points
- Power outages for maintenance affect the continuity of power supply and result in high labor and time costs.
- Early-stage hot spots typically exhibit a temperature rise of only 1–3°C, making them difficult to detect through visual inspection or spot thermometers.
- Traditional inspection methods are inefficient and make it difficult to achieve full coverage.
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Solution
For disconnecting switch inspection, a thermal camera enables non-contact, non-stop rapid diagnostics. Operation and maintenance personnel can scan critical components such as the disconnect switch contacts and bushings from a safe distance. The thermal camera intuitively displays the temperature distribution in the form of thermal images. Combined with its built-in intelligent analysis algorithms, the system can automatically identify abnormal areas that exceed the preset threshold, mark suspected overheating regions in real time, and generate standardized reports.
Non-stop Inspection: No power shutdown is required throughout the inspection process, ensuring zero impact on power supply.
Precise Fault Localization: Displays the temperature field from point to surface, ensuring that even minor potential hazards are not overlooked.
24/7 monitoring: Enables continuous monitoring to ensure safe and reliable operation.
Wind Farm Bushing Infrared Inspection
Background
The high-voltage bushings of the main transformer in a wind farm substation step-up station play a critical role in stepping up the electricity generated by wind turbines and transmitting it to the power grid. As wind farms are often located in remote areas, these bushings are exposed to high voltage, high current, and harsh environmental conditions such as windblown sand and salt spray over extended periods. As a result, insulation aging, moisture ingress, poor electrical contact, and other issues can easily lead to localized overheating.
Pain Points
- Wind farms are widely distributed in remote areas and cover large sites, making regular manual inspections inefficient.
- Early-stage temperature rise in bushings is not obvious, which can conceal potential hazards.
- Sudden temperature increases cannot be captured in real time, leading to delayed fault detection.
Solution
Operation and maintenance personnel can use a handheld thermal imaging camera to perform routine inspections of high-voltage bushings. By scanning the temperature distribution of the three-phase bushings from a long distance, they can quickly determine whether abnormal heating exists. Meanwhile, online thermal cameras can be deployed at critical bushing locations to enable 24/7 continuous temperature monitoring and real-time alerts.
Long-Distance Safe Inspection: No need for climbing or power shutdown; panoramic inspection of bushings can be completed from the ground.
Precise Localization: Dual-spectrum fusion enables accurate identification of the overheating phase and specific location.
24/7 protection: The online monitoring system continuously captures sudden temperature rises in real time, eliminating inspection blind spots.
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