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The telecommunications revolution has increased the options and capabilities available for communications-based protection of transmission lines. To improve tripping speeds on long and short lines, protection engineers can select from a host of media, protocols, and logic schemes. The question to address is what communications scheme is best for which circumstances. This paper begins by establishing...
The telecommunications revolution has increased the options and capabilities available for communications-based protection of transmission lines. To improve tripping speeds on long and short lines, protection engineers can select from a host of media, protocols, and logic schemes. The question to address is what communications scheme is best for which circumstances. This paper begins by establishing...
In this paper, after an overview of transmission line series compensation, we review series-compensated line protection challenges, that include voltage inversion, current inversion, and distance estimation errors. We then present modern solutions to improve directional, distance, and differential element operation on series-compensated lines. Later we provide relay setting guidelines. Finally, we...
In this paper, we first review the need for communications-assisted protection of subtransmission lines, describe the communications channels available, and compare applicable protection schemes. We show the advantages of directional comparison protection over digital point-to-point radio channels for this application. Later we present a summary of the applications of directional comparison protection...
This paper describes a digital simulation study of a set of two 160 MW generating units operating in the Juan de Dios Batiz Paredes thermal power station, in Topolobampo, Sinaloa, Mexico. This plant belongs to Comision Federal de Electricidad, the national Mexican utility. We first discuss the factors that limit the active and reactive power delivered by a generating unit, such as thermal and voltage...
A classical task in the protection of transmission lines against short circuits is the estimation of the electrical distance to the fault and its comparison against a given threshold to determine whether the line is faulted or not. This paper presents a novel neural network approach to this problem, as a step towards the design of a neural protective relay. Two different alternatives are proposed...
This paper describes a fault detector that uses artificial neural networks (ANN). It represents the Brst step toward the development of a neural distance relay for protecting transmission lines. We envisage the fault defection problem as a pattern classification process. Our suggested approach Is based on the fact that when a fault occurs, a change In the system Impedance takes place and, as a consequence,...
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