INSPECTION OF PHOTOVOLTAIC POWER PLANTS

In our country, PV modules made from mono and polycrystalline silicone are used most for the construction of photovoltaic power plants. Unfortunately, in addition to high efficiency, these modules are also characterized by a high incidence of “hot spots”, i.e. defective silicone cells. This malady is due to their structural design, and it cannot be predicted or avoided. Every year dozens of defective PV modules may occur in such photovoltaic power plants.

  • The most modern and safest UAS on the market
  • Specially developed technology SWATI (Smart Waypoint Aerial Thermal Inspection)
  • Extremely high-resolution thermal imaging
  • Three-axis camera stabilizer for maximally sharp images
  • Output protocol with 3D photovoltaic power plant thermal model
  • Exact localization of defective PV modules with GPS
  • Years of experience in the operation and maintenance of photovoltaic power plants
  • Precise post-processing with fully radiometric data

We identify the following defects:

  • Visual violation of fence integrity
  • Issues with the interconnection of panels
  • Defective cells, “hot spots”
  • Defective bypass diodes
  • Poling panels
  • Panel defects
  • Defective soldering
  • Pollution and mold
  • Potential damage from storms
  • Panel shading

INSPECTION OF WIND TURBINES

Compared to other machines, wind turbines operate in extremely difficult conditions, because wind is a very irregular force. This means that the wind turbines are subjected to much higher dynamic loads than other devices. Adverse operating influences also include a wide range of temperatures, frost, corrosion, sun, extreme wind speeds and its random fluctuations.

  • The most modern and safest UAS on the market
  • Specially developed technology SWATI (Smart Waypoint Aerial Thermal Inspection)
  • Extremely high-resolution imagery
  • Three-axis camera stabilizer for maximally sharp images
  • Full-frame optical zoom for perfect details
  • Rendering of 3D wind turbine model
  • Exact location of critical points according to a 3D model
  • Years of experience in the operation and maintenance of wind turbines

We identify the following problems:

  • Delamination of blades
  • Integrity breach and tube defects
  • Engine overheating
  • Identification of lightning damage
  • Malfunctioning light signalization

REVISION OF HIGH VOLTAGE/VERY HIGH VOLTAGE LINES

Electrical installation fires are a relatively common and underestimated phenomenon in the industry. They can lead to a short shutdown without a serious financial impact or injury, but they can also lead to a widespread fire and loss of life. Most problems can be avoided by regularly monitoring electrical installations and repairing them if necessary. Thermography has been used for the inspection of electrical installations in full operation for several decades, and it is considered a proven method today. Its principle is based on determining the intensity of thermal radiation from the surface of the measured object using a thermal imager, with the subsequent calculation of surface temperatures (quantitative method). The severity of the malfunction is determined by the extent of the determined temperature rise.

The question is how to inspect devices that are at great heights, under high voltage and located in areas with difficult access. How to examine a network in large substations, when the entire system occupies a large area and the inspected elements are difficult to access?

For high voltage traction power lines and all places where the distance or poor accessibility of the inspected elements is an issue, our company offers an elegant and precise solution – a lightweight compact camera assembly for a visible spectrum, thermal imagers and controls, enable users to check otherwise difficult to access power lines at great heights in a very short time. You can view a live image from both cameras, or record the entire flight and then analyze it and identify the damaged areas. For drones with a thermal imager, inaccessible terrain or large substation areas do not pose a problem. The controller controls the entire system from a safe distance without any discomfort, as is the case in conventional ground inspections.

INSPECTION OF PIPELINES

The issue of aerial thermographic inspection of pipelines mainly applies to long-distance pipeline systems, which are used to transfer various media with a temperature that is different from the ambient air temperature. When using thermographic systems, it is possible to identify and locate insulation defects in these pipelines and leaks of the transferred medium. In some cases, it is possible to identify and locate leaks in underground pipelines as well.

In practice, this may include water pipelines (heat pipelines, water pipelines), steam (steam pipelines), product pipelines (oil and gas pipelines), pipelines in chemical plants, the food industry, agriculture, power plants, mines, etc. In addition, the pipelines are often also used to transport the material itself, as well as to transfer thermal energy bound to the transferred material. This is associated with the issue of thermal insulation pipelines and determining pressure losses in the pipeline. The entire transport system must be perfectly tight, because leaks of the medium not only represent energy and economic losses, but often also environmental losses.

A regular camera does not detect internal defects in thermal insulation and leakage beneath the surface. Early detection of places where the insulation is thinned or where the pipe casing is damaged can prevent larger accidents, which may result in economic losses and also endanger the health and lives of people. A thermo imager, which senses the thermal radiation of objects, can detect such defects. Based on temperature differences on the surface of the pipeline and the experience of the observer, it is possible to detect hidden defects. The place where the insulation is breached and heat losses are occurring (during the transport of heating media) can be easily determined. In underground pipelines hot water leakage heats the affected soil, making it possible to determine where the pipeline is ruptured underground. This eliminates the need to dig up kilometers of pipeline to detect the site of the leak. A different temperature also reveals thin spots, where there is a risk of the pipe rupturing, and early intervention can avert fatal consequences.

WIRIS application

Workswell WIRIS 2nd gen is currently the most advanced thermal imaging system for commercial UAVs, i.e. drones. It is a compact system that combines a thermal imager, a digital camera (in the visible spectrum) and CPU in a single enclosure, with the possibility of radiometric data recording with a digital HDMI output.

Workswell WIRIS 2nd gen represents a revolution in its category, primarily thanks to its wide control options in real time directly on the drone using a standard RC transmitter. It is possible to remotely store fully radiometric image data (individual images and video), change the temperature range setting, measurement parameters (emissivity and reflected apparent temperature), temperature alarms, etc., with one button. These options make the system unique.

CERTIFICATION