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Abstract. This article observes maintenance problems of PWM-Electric Drive in Power Networks with distributed generation (DG). Compared to conventional centralized networks harmonics disturbances and non-sinusoidal waveforms happen faster in DG networks due to bigger amount of non-linear loads (Frequency and Power AC and DC Converters, PWM-Electric Drive, etc.). As a result, general stability, power quality and uninterruptible power supply can be disturbed. In order to prevent these factors a complex of power conditioning measures is proposed in this article. It demonstrates the possible influence of Active Power Filters with selective harmonics compensation function implementation together with developed controller and preventive algorithm. Almost all modelling was performed in Matlab/Simulink software.

When transmitting electricity over long distances, overhead power lines are used. When servicing the lines, brigades of workers performing manual inspection are used. This collection of information is not efficient and time-consuming, since it is possible to identify only those problems that a person can see. Problems such as the destruction of insulators, the slope of the poles of power lines, a small layer of icing will remain unnoticed and will lead to serious consequences, such as a break in power lines and falling poles. If the lines are broken and the supports fall, the repair team will have to drive the entire section of the power transmission line from start to break, if the terrain allows you to use ground transportation. Provided that some lines can stretch for hundreds of kilometers - troubleshooting can stretch for several hours or even days. The use of robotic systems will prevent such accidents, and in case of their occurrence due to force majeure circumstances, speed up the search and repair. The likelihood of electric shock will also be reduced.

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