ПЕРЕТВОРЮВАЛЬНИЙ АГРЕГАТ КОМБІНОВАНОЇ СИСТЕМИЕЛЕКТРОЖИВЛЕННЯ З ФОТОЕЛЕКТРИЧНОЮ СОНЯЧНОЮБАТАРЕЄЮ В СИСТЕМІ ІНТЕЛЕКТУАЛЬНОГО УПРАВЛІННЯ ЛОКАЛЬНОГО ОБ’ЄКТУ

Abstract

The issues of improving the multifunctional converter unit of a combined power supply systemwith a photovoltaic battery, which is used for a local object together with an intelligent energy management system, are considered. A methodology for estimation the current value of the maximum power of a photovoltaic battery during operation based on the measured values of voltage and current and short circuit current is given. The principles of the implementation of the autonomous mode of a photovoltaic system in the absence of a battery are developed taking into account the current value of the maximum power of a photovoltaic solar battery and adjusting the load power. The possibility of using the autonomous mode to stabilize the voltage of consumers when the voltage deviates beyond acceptable limits is shown. The structure of power circuits and the control system of the multifunctional converter unit has been improved. The system provides for regulation of the load power and the photovoltaic solar battery depending on the ratio of power that is consumed and generated. This is done when the control system of the converter unit interacts with the intelligent controlsystem of the local object with the introduction of additional elements, which helps to eliminate emergency transients when switching operating modes and corresponding changes in the structure of the control system. The obtained solutions are the basis for the design of multifunction converters for systems with a photovoltaic battery with improved energy efficiency.