Active compensation of voltage dips, deviations and distortions in electrical networks with highly variable loads and long lines

The article deals with the problem of voltage dips, deviations and distortions active compensation in power supply systems with highly variable load and long lines. The main results of theoretical and experimental researches carried out in power supply systems of oil-production enterprises are presented. The relationships between acceptable value and duration of voltage dips and deviations and parameters of connected load in oil-production enterprises as an example are obtained. The mathematical model for estimation of value and duration of voltage dips and deviations as a function of a start-up mode of large motors and parameters of power lines is developed. The structure of improved dynamic compensator of voltage distortion, which enables efficient elimination of voltage dips and deviations under conditions of power supply systems with long power lines and highly variable load, is developed and proved.