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This document discusses the analytical tools available to utilities for assessing the performance of distance relays in series compensated applications prior to selecting a specific relay type. Traditional methods like steady-state fault simulations using PSSE and CAPE are inadequate for calculating relay settings, while EMTP studies are limited due to manufacturers' proprietary information. The only viable solution identified is simulator tests, as exemplified by Svenska Kraftnät, which employs these tests to evaluate new distance relays effectively for series compensated lines.
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Q 4: What analysis tools are available to utilities to assist in evaluating distance relay performance on series compensated applications prior to the purchase or choice of a particular relay type? Steadystate fault simulations as PSSE and CAPE used for calculating relay settings are not suitable EMTP studies insufficient due to the manufacturers secrets The only tool is simulator tests Svenska Kraftnät use simulator tests to evaluate new distance relays for series compensated lines Leif Koppari