Adaptive distance relay algorithm for shunt compensated transmission line

This paper presents an adaptive zone selection algorithm for the transmission line with midpoint connected STATCOM. The objective of this paper is to investigate the performance of transmission line distance protection with shunt connected FACT device (STATCOM). The impact of STATCOM on distance protection is investigated for different types of fault, different fault resistances, and load angles. The studied power system and STATCOM with their associated elements and controllers are modelled using EMTDC/PSCAD software. A numerous number of fault scenarios are simulated and the strength of the proposed adaptive zone setting method is evaluated.

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