The dissertation is devoted to development of an improved power plant automatic control system by introducing a model-oriented intelligent decision support system into the automatic control system to reduce accidents due to the influence of the “human factor”. The first section analyzes the composition, structure and capabilities of modern ACS power plant in terms of performance management and safety in accordance with the requirements for the operation of ship power plants based on ACS operating on ships and current trends in their development by manufacturers such as SIEMENS and WOODWARD. The normative requirements put forward by the state and international standards to the ship synchronous alternating current electric units, which are put into rotation by internal combustion engines, are analyzed. The main causes of accidents in power plants and the impact of the human factor on the failure of the power plant and current trends related to remote control of the power plant and the concept of a virtual shift mechanic are considered. Possibilities of application of mathematical models as a part of automatic control system were also considered. In the second section, a mathematical model of the automatic control system of the power plant in transient and dynamic modes was developed, which made it possible to assess the quality of transients in the study of currents, voltages, speed, active and reactive power in transient and dynamic modes. In the third section, the structure of ASC with an object-oriented decision support system is developed. A criterion for evaluating the process of including generators in parallel operation is chosen. Proposed criteria, that allows to calculate quantify the process of pulling generators into synchronization. It is determined that the most objective and convenient indicator of quality is the area under the frequency curve of the rotor of the generator. When applying this criterion, the speed can not only be calculated on the model, but also measured on the existing unit. The proposed criterion allows to compare the processes of inclusion in parallel operation, to optimize the design parameters and methods of control of generator synchronization. For the first time, a method of formalizing control problems is proposed, which consists of estimating the values of currents, voltages, speed, calculating the criterion for evaluating the connection to parallel operation, taking into account the definition of performance and safety. This method allows you to formalize and assess the effects of changes in operating modes on the simulated parameters before their actual appearance in the power plant, which allows you to minimize the number of emergency modes by predicting future parameters and increase productivity by reducing accidents. Also, for the first time, a method of increasing productivity and reducing accidents by using a fuzzy logic device, which can be used at the stage of operation of the ACS power plant, which allows the power plant to work out any permitted modes. The software means of realization of the mathematical model of ACS of the ship electric power installation are chosen. A computer program for studying the modes of operation of the ship's power plant has been created.
In the fourth section, a synthesis of the decision support system for the ship's power plant was carried out, possible hardware implementations of decision-making methods were considered to determine the possibility of integration of the developed methods. The selection and formation of input and output linguistic variables for decision-making methods and the choice of fuzzy inference algorithm were presented. A decision method is proposed to assess the impact of the most likely disturbances on accidents and performance.
Performance at power outages during the flight is calculated and the dependence of productivity on the number of power outages is shown.
The following operating modes of the system were investigated on the developed software package with the use of the developed methods: - inclusion of active-inductive load with a power equal to the power of the generator unit;- inclusion of diesel generators in parallel work at increase of insensitivity of the regulator of frequency of rotation; occurrence of equipment malfunctions due to insulation breakdowns and short circuits; short circuit of the excitation winding. The application of the system for training and assessment of the level of knowledge of marine specialists is proposed.
