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The article deals with the control system for the electric drives of drilling winches and rotors based on a programmable logic controller and thyristor converters. The block diagram of the controller is described. The shortcomings of the existing control system associated with the failure of the controller module are revealed. The failure statistics of the controller modules for 2014-2015 is given...
When supply from one of the power supply sources is interrupted, electric motors of pumping station loses supply and passes running-down mode; during this process rotational speed of pumps and performance of the pipeline decrease and pressure waves emerge. At the present, an automatic switch with hard logic and fixed values of operation is used for restoration of power supply for oil pumping stations...
The system of indicators and scientific success criteria on their basis has been constructed to compare the quality of the scientific results for universities in Azerbaijan. Based on the expert-statistical approach the weight ratios of indicators are calculated and ranking table for the 2011 year was constructed on the basis of the statistical data obtained from “Science” section of Ministry of Education.
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