Currently, various types of maintenance robots for PTLs are being developed to solve this problem.

Tools and methods that enable the inspection and maintenance of PTLs are very important. Therefore, research on PTL inspection/maintenance is important for ensuring a stable power supply and preventing wide-area outages. Inspection by aircraft is expensive and can be dangerous under bad weather conditions. Manned inspection is performed by a worker moving along a high-voltage line or hanging from a gondola rough terrain can make it difficult for the worker to access power transmission lines (PTLs) in coastal and mountainous areas. Until now, those power facilities have been investigated by aircraft or manually by an operator.

Large-scale power facilities have been built to provide reliable power, and lines with several kilometers long have been installed for extra-high voltage (EHV) transmission. The global demand for electric power has been increasing because of population growth and industrial development.

Maintenance robot system shock art