Abstract
An urgent problem is the development of automated systems for calculating relay protection set points. In the conditions of industrial power supply systems, the calculation of relay protection settings is further complicated by the features of these facilities. The software complexes that exist today either offer the possibility of determining setpoints based on manually calculated or in another software product mode parameters, or are focused on complex networks of power systems. In this paper, an algorithm is proposed for the automated calculation of the current cut-off and maximum current protection settings of a power transformer in an industrial power supply system. The proposed algorithms consider the features of the protection terminals, the requirements of the rules for electrical equipment installations, and makes it possible to calculate the parameters of the steady-state and emergency mode, and the parameters of the protection operation on the same calculation scheme. Algorithms for automated calculation of setpoints are implemented in the software module "KATRAN". Thus, the calculation scheme created in the developed product makes it possible to determine the parameters of the normal mode, overload mode, maximum short-circuit mode and minimum short-circuit mode (both symmetrical and asymmetric). The obtained calculation results are used for automated determination of protection settings, assessment of their sensitivity and recalculation of response parameters into secondary values for mapping setpoints
Keywords
power supply system, industrial power supply, relay protection, setpoints, automated calculation
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