20.500.12556/RUL-134402 Principal Component Analysis (PCA)-supported underfrequency load shedding algorithm This research represents a conceptual shift in the process of introducing flexibility into power system frequency stability-related protection. The existing underfrequency load shedding (UFLS) solution, although robust and fast, has often proved to be incapable of adjusting to different operating conditions. It triggers upon detection of frequency threshold violations, and functions by interrupting the electricity supply to a certain number of consumers, both of which values are decided upon beforehand. Consequently, it often does not comply with its main purpose, i.e., bringing frequency decay to a halt. Instead, the power imbalance is often reversed, resulting in equally undesirable frequency overshoots. Researchers have sought a solution to this shortcoming either by increasing the amount of available information (by means of wide-area communication) or through complex changes to all involved protection relays. In this research, we retain the existing concept of UFLS that performs so well for fast-occurring frequency events. The flexible rebalancing of power is achieved by a small and specialized group of intelligent electronic devices (IEDs) with machine learning functionalities. These IEDs interrupt consumers only when the need to do so is detected with a high degree of certainty. Their small number assures the fine-tuning of power rebalancing and, at the same time, poses no serious threat to system stability in cases of malfunction. machine learning power system frequency stability load shedding power system protection strojno učenje frekvenčna stabilnost elektroenergetskega sistema razbremenjevanje zaščita elektroenergetskega sistema true false true Angleški jezik Slovenski jezik Članek v reviji 2022-01-13 12:55:59 2022-01-13 12:56:00 2022-09-13 03:54:56 0000-00-00 00:00:00 2020 0 0 9 str. iss. 22, art. 5896 Vol. 13 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.31:004 1996-1073 10.3390/en13225896 37324291 RAZ_Skrjanc_Tadej_2020.pdf RAZ_Skrjanc_Tadej_2020.pdf 1 58A7631B06BE0E9D3D4B8BD7DC5603E3 a8b9d3143e245060a4da30508d58a87f2056fa4aaa4ca7c910a2482cd4b16327 1aa9d6b8-7468-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152836 https://www.mdpi.com/1996-1073/13/22/5896 1 98c2242b-7467-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152835 Fakulteta za elektrotehniko 0 0 0