Tkachenko O. Automatic control system for start up of a supercritical boiler of thermal power plant

The subject of research: automatic control system for heating process of steam in super critical boiler 300 MW in start up mode. The aim of research: increase of supercritical boiler efficiency start up based on control of equipment transient behaviours. Research methods are methods of system analysis, mathematical modelling, mathematical physics, analysis of results of experiment, identfication, modern theory of automatic control. On the basis of physical laws of heat mass transfer the model of heating of steam and technological constructions is developed. Methods and algorithms of parametric identification of external heat exchange are developed with the purpose of initial tuning of mathematical model. The model based predictive control algorithm is purposed for fuel consumption. The mathematical instrument of Petri nets is applied for description of start up technological operations. The states of network and condition on transitions between them describe the technological operations of power unit. For each five stages of starting corresponding Petri nets are developed. Information about technological operations allows synchronizing consumption of fuel, water flow rate and built-in separators control. According to recommendations of the technological instruction and practical experience of boiler machinists the heuristic control algorithms for the valves of built-in separators are developed. The multidimensional automatic control system for start up of super critical boiler 300 MW and algorithm of its functioning with model-based predictive control for gradient of thermal power and discrete situation management operations are developed. The results of dissertation research are implemented on blocks 1-4 Zuevskaya power plant in industrial exploitation and also are used in studying process in Donetsk national technical university. Area of application - heat-power engineering.