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The relevance of the research is caused by the need to maintain the required quality and increase light oil products output at low-power oil refineries under conditions of variable composition and consumption of raw materials. The problems of improving management quality become more serious in the conditions of small oil refineries. They have not their own production base and they have to purchase a lot of oil from various oil production organizations. Therefore, raw materials with different composition often come for processing. One of the difficulties in developing oil distillation control system is the necessity to use laboratory data of petroleum products quality indicators. This force to use the simplified control algorithms that can operate on the basis of the data received with the big delay. The aim of the research is to achieve maximum output of light petroleum products in the atmospheric distillation cube in conditions of variable flow rate and composition of raw materials improving the control system. Research objects: atmospheric distillation unit for low-capacity oil (less than 500 thousand tons per year). Methods of the research are based on automatic control theory, heat and mass transfer theory, mathematical modeling and simulation. Research. The authors have stated the task of managing the low productivity atmospheric rectification unit and determined some features of the control object. Input and output parameters as well as the optimization criterion were choose. The paper introduces the method of managing using the mathematical model. The structure of management system using Matlab is given. The method provides a growth in extraction of light oil products by decreasing a variability of oil fractions boiling temperatures.

The relevance of the research is caused by the need to maintain the required quality and increase light oil products output at low-power oil refineries under conditions of variable composition and consumption of raw materials. The problems of improving management quality become more serious in the conditions of small oil refineries. They have not their own production base and they have to purchase a lot of oil from various oil production organizations. Therefore, raw materials with different composition often come for processing. One of the difficulties in developing oil distillation control system is the necessity to use laboratory data of petroleum products quality indicators. This force to use the simplified control algorithms that can operate on the basis of the data received with the big delay. The aim of the research is to achieve maximum output of light petroleum products in the atmospheric distillation cube in conditions of variable flow rate and composition of raw materials improving the control system. Research objects: atmospheric distillation unit for low-capacity oil (less than 500 thousand tons per year). Methods of the research are based on automatic control theory, heat and mass transfer theory, mathematical modeling and simulation. Research. The authors have stated the task of managing the low productivity atmospheric rectification unit and determined some features of the control object. Input and output parameters as well as the optimization criterion were choose. The paper introduces the method of managing using the mathematical model. The structure of management system using Matlab is given. The method provides a growth in extraction of light oil products by decreasing a variability of oil fractions boiling temperatures.