The electric power quality of the electrical complex of OOO Kirishinefteorgsintez. refinery was investigated. Measurements were carried out in conditions of operating equipment at distribution substations of the enterprise and at the interface with the power system. On the basis of existing methods of measurement, control and analysis of electric power quality the allowable contribution to electric power quality deterioration by electric consumers of the refinery at the interface with the power system was estimated. Assessment of allowable contribution to deterioration of power quality showed that when increasing the installed capacity of drives based on frequency converters over 12% of the total installed capacity of electrical consumers of the refinery will exceed the maximum allowable values of the distortion factor of the voltage curve sinusoidal at the interface with the power system.
