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A digital simulator for post-experience training in digital distance protection

For several years the University of Bath has run post-experience courses in Digital Power System Protection aimed at professional engineers from the electricity supply industry. Part of this course involves a computer laboratory session for the simulation of a digital (distance relay. This paper describes the software developed for this laboratory session which comprises a relay simulation including 6 elements in the first zone, primary system fault simulation which includes the EMTP, and graphical software to display the results. The training structure of the laboratory session is also discussed.