Novikov P. Control processes automation of thermal power plant unit inertial channels using a two-channel fuzzy controller

The dissertation is devoted to increase of automatic control systems efficiency of inertial contours of thermal power plant units, which operate in maneuvering modes. A parallel two-channel control scheme using fuzzy logic blocks in both channels is proposed. This provides the necessary quality operation of the control system throughout the range of load variation of the power unit. The basis of its work on the experience and knowledge of operators using manual mode to control process that allowed to obtain a better quality of transients, while reducing the number of inclusions of actuator. The mathematical models in the form of transfer functions of inertial circuits of the power plant unit on the whole working range of loads are improved. For two-channel fuzzy controller system offers new stability margin approach that allows adaptation of linear automatic control theory methods for nonlinear system. In the language of ST, IEC 61131-3, an algorithm for fuzzy output of Mamdani is implemented, as well as the software implemented structure of the two-channel fuzzy controller. A comparison of the developed system with existing control schemes are done and given indicators of quality. The simulation confirmed the effectiveness of the proposed system. The developed control scheme, the operation algorithm and the software have been thoroughly tested at the Trypillya TPP and submitted for further modernization of the steam boiler thermal load control system, which is confirmed by the relevant act of implementation.