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An accurate algorithm for locating faults on a series-compensated line is presented. This algorithm can be applied with current differential protective relays since two-end currents and one-end voltage are utilized as the fault locator input signals. The algorithm applies two subroutines and the procedure for indicating the valid subroutine. The algorithm has been evaluated using the fault data of...
This paper deals with protective relaying issues in relation to connecting the distributed generation sources into the distribution network. The considerations on fault conditions in the networks with incorporated distributed generation sources are analyzed. Protective relaying for such sources is considered. An impact of the sources on fault currents and operating conditions of protective relaying...
A new algorithm designated for locating faults on a double-circuit line is presented. It is assumed that the fault location function is incorporated into the current differential relay at the particular line end. Besides three-phase currents measured synchronously at both line ends, which are utilized by the protective relays, the fault locator is supplied with three-phase voltage from the local line...
This paper presents an adaptive method for non-pilot distance protection of a power transmission line. It exhibits improved operation under resistive faults, i.e. reducing an under reaching and overreaching of the relay, that is caused by a remote line end infeed. Use of one-end measurements and also two-end synchronized measurements are considered. The developed adaptive distance protection algorithms...
This paper deals with the post-fault analysis of operation of distance protective relays from the line terminals. The signals of the digital distance relays are processed in the off-line regime with the aim of evaluating the particular relay operation case. First, the program enables the emulation of the fault loop impedance measurements of the distance relays. Second, the two-end unsynchronized measurements...
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