The complex system of control, monitoring and improvement of power quality in power supply systems of oil production enterprises is designed, which also allows to decrease the negative influence on the environment. The main reasons for mismatch between the actual electricity quality in distribution network and the requirements for oil producing businesses, as set forth by reference documents, have been disclosed. Provided are recommendations in connection with the arrangement and the practical implementation of technical measures for controlling and improving the quality of electric power in oil producing enterprises power supply systems.