Concerning the Arrangement of the Electrical Supply System of Buildings With Renewable Energy Sources

Buildings are currently one of the largest consumers of energy resources in Ukraine, including electricity[1], accounting for about 40% of energy consumption. In Ukraine, the requirements for energy consumption in buildings are regulated by the Law "On Energy Efficiency of Buildings" through the relevant energy efficiency classes[2]. The issue of improving the energy efficiency of these facilities is a global challenge at the global level. In particular, the 2019 UN Climate Summit set a goal to achieve zero energy consumption in new buildings by 2030 and the same level in existing buildings by 2050. The use of renewable energy sources is an absolute and necessary component of achieving these goals. In addition, it should be understood that the share of renewable energy will grow steadily, in particular in household facilities. Over time, every building will be powered by renewable energy in one way or another. A review of the literature on the design of energy-efficient buildings in terms of engineering systems design revealed a low level of coverage of issues related to the design and design of power supply schemes for buildings with RES[3-7]. The article presents existing circuit solutions for the integration of RES (solar photovoltaic generation) into the building power supply system, in particular, a building power supply system with a grid-tie inverter and power optimizers, a building power supply system with microinverters, a building power supply system with twin microinverters and a prefabricated combined switchboard, a building power supply system with a backup power source, a power supply scheme with redundancy and a smart controller. A variety of schematic solutions for the power supply system allows you to choose the one that will meet a single or a set of criteria: the location of the panels by the cardinal points (one side or several); redundancy; cost; "intelligence" of the system.