Palamar A. Methods and means of improving the technical characteristics of intelligent uninterruptible power supply systems for telecommunication complexes

The thesis is devoted to solving an important scientific and practical problem, which consists in the development of methods and means for improving the technical characteristics of intelligent uninterruptible power systems for telecommunication complexes in distributed local power networks. A method for adaptive load level regulation of the UPS rectifier modules within a predetermined optimal range of values has been developed. It is made possible to reduce losses in the rectifier modules and thus increase the energy efficiency of the UPS. The main idea of this method is to implement an algorithm to control the process of their inclusion and deactivation to achieve the optimal value of their load factor and maintain its level in a certain optimal range. The development and implementation of a method of the rectifiers operation control for the modular uninterruptible DC power supply unit in order to increase its reliability is proposed. The main idea of the method is to control the process of cyclic shifting of the switched-on power modules of the uninterruptible power supply by series switching into operation of each subsequent module from their unloaded reserve and switching out the previous one. The computerized control system structure is improved. In addition to the central control module, it is proposed to add the control unit for rectifier modules, which is responsible for implementing the process of their switching on and monitors their condition. The implementation of the developed method, due to the uniform reduction of the period during which the power modules of the uninterruptible power supply are on the switched-on loaded state, makes it possible to increase their operating time to failure, which in turn increases its reliability without deteriorating energy efficiency. In order to investigate the effectiveness of the proposed method, a simulation model describing the power modules control logic is developed. The simulation results demonstrate the efficiency of the developed algorithm in various system operation modes. The computerized control and monitoring system of uninterruptible power supplies based on the neural network technologies is developed. The short-term forecasting of electricity consumption and adaptive PID control of the battery charge process are implemented in the system. It has made it possible to improve the technical characteristics of the uninterruptible power supply system due to more efficient management. The practical implementation of the research results by developing based on the proposed models, methods and means of hardware, algorithmic and software components of a computerized control and monitoring system for the modular uninterruptible DC power supply unit confirmed the effectiveness of the proposed theoretical solutions.