METHODOLOGY AND MEANS OF OPERATIONAL MONITORING OF ELECTRIC MOTORS AT COMPRESSOR STATIONS

Abstract

The present technical condition of the fleet of electric motors serving the actuators of the infrastructure facilities of the fuel and energy complex is presented. The statistics of damage and damage from abnormal operation of electric drive units operating on mechanisms with a fan and pump load are given. The analysis of the causes of the increase in the range of vibration displacement, which leads to premature failure of electric motors, is given. A method for reliably determining the causes of damage, based on measuring and analyzing the electrical parameters of the harmonic spectrum of the motor current, is proposed. Its essence consists in creation of the universal diagnostic system working at the physical principle at which any indignations in work of an electric and mechanical part of the engine and related actuator lead to modulation of the consumed current. Existence in a range of current of characteristic frequencies of a certain size demonstrates existence of these or those damages. The device for its implementation includes phase current sensors of the supply voltage, a signal conditioner for normalizing and filtering signals, an analog-to-digital converter with a USB interface, and a controller with software for analyzing, evaluating, and diagnosing the condition. Experimental results have been obtained confirming the adequacy of the methodology and technical means for monitoring electric motors of various mechanisms.