Based on the application of quality control methods, an analysis of the technological disturbances (accidents) causes on overhead power lines with a voltage in the range from 0.4 to 110 kV AC was made. The main causes of accidents on overhead lines were systematized. The need to control the operational parameters of overhead lines that affect the sustainable functioning of electric power systems has been proved. The structure of the information-measuring system for monitoring the overhead lines parameters has been developed. The purpose of its implementation is to ensure a reliable power supply to consumers, improve the level of operational and technological control of networks and reduce the economic costs of eliminating the consequences of accidents in electrical networks.