renewable energy source

The increasing penetration of renewable energy sources (RESs), such as photovoltaic and wind power plants, into the medium-voltage distribution grid creates significant concerns regarding voltage control at local substations. Understanding the specifics of the RES operation impact on the phenomenon and propagation of voltage fluctuations in the distribution grid is important for engineering solutions in the practice of RES design and operation. The presented article describes an algorithm for estimating the impact of RES on voltage fluctuations in the medium-voltage grid.

In this article the specific heating and cooling capacity of the ceiling TABS was determined. The step of tube laying varied and was 10, 15, 20, 25, and 30 cm. Determination of the specific heating capacity was carried out for th /tc = 35/31; 36/32; 34/30 oC. The determination of the specific cooling capacity was carried out for tcold /theated = 15/18; 16/19; 16/20oC. The radiant heating system based on ceiling TABS allows providing the necessary heating capacity to fully cover the heat loss of the room. The maximum values of the carrier temperature are th /tc = 34/30 oC.