МОДЕЛЬ РОБОТИ РОЗПОДІЛЬНОЇ МЕРЕЖІ В ІЗОЛЬОВАНОМУ РЕЖИМІ.

The vulnerability of powerful power generation facilities and the transmission system to military, man-made, and natural impacts, and the extreme complexity of protecting these facilities from the mentioned impacts necessitate the search for new solutions to provide reliable power supply to consumers. Obvious direction in this aspect is the practical implementation of elements of a decentralized approach to ensuring the functioning of the Interconnected Power System (IPS) of Ukraine. The intensive development of renewable energy in Ukraine in recent years has been driven, among other things, by the sources of relatively low power (in particular, solar power plants (SPP) with an installed capacity of up to 100 kW), which created the preconditions for the practical implementation of the microgrid concept, which enables to provide long-term power supply of local consumers even in the event of disconnection of power grid from the ІPS, which supplies power to microgrid consumers under normal operating conditions. This article presents the results of modeling the functioning of a microgrid created on the base of a real electric grid of a settlement with the corresponding daily profiles of power consumption and generation by local sources. The modeling was carried out in the MATLAB software environment. Two model configurations were considered in the study: a hybrid microgrid with a SPP and a diesel generators and a hybrid microgrid with a SPP and energy storage unit. The objective of the study to achieve stable operation of the power grid in the conditions of loss of electrical connection with the external power system, providing priority power supply to critical infrastructure facilities and consumers of the 1-st category in terms of reliability is ensured. Two main scenarios of isolated microgrid operation were modeled: winter (including cloudy and sunny days) and summer periods of maximum consumption. The results of the study show the possibility of practical organization of microgrids based on existing distribution power grids with local energy sources using Distributed Energy Resource Management Systems (DERMS), which ensure high efficiency of the local energy infrastructure and sustainability of the created microgrid. [ABSTRACT FROM AUTHOR]