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This paper presents a new protection scheme for high-speed protection of transmission lines, the Integrated Positional Protection scheme. The concept of integrated protection is firstly introduced, in which a centralized protection relay provides the protection for multiple transmission lines. The proposed scheme is based on a specially integrated relay unit, which is installed at each substation...
This paper presents a new integrated protection scheme for transmission lines. The concept of the integrated protection is firstly introduced, in which a centralized protection system provides the protection of multiple power plant or a substation. A total integrated protection scheme based on current differential protection techniques is further described. In the proposed scheme, the specially designed...
This paper presents a new integrated current differential protection scheme for transmission lines. The concept of the integrated protection is firstly introduced. An integrated protection scheme based on the current differential techniques is further described, in which a specially designed protection relay with protection algorithms of multiple settings is responsible for the protection of all the...
The study of various stability-control methods for a transmission system indicates that the reclosing time of a transmission line has a distinct influence on system stability. And there is an optimal reclosing time (ORT) for all transmission line faults. Utilizing the transient energy function (TEF) with classical models considered, the ORT setting computation method is proposed. This paper shows...
A parallel line integrated protection technique based on transient current polarity comparison is presented. An integrated protection relay interfaced to both CTs of the parallel lines, is responsible for the protection of the parallel lines. The polarity ofthe transient current component which comes from the faulted direction on the transmission line is different from the one which comes from the...
This paper presents a new integrated protection scheme for transmission lines. The concept of the integrated protection is firstly introduced, in which a centralized protection system provides the protection of multiple power plant or a substation. A combined integrated protection relay for the protection of double circuit lines is then introduced, which combines the longitudinal current differential...
A novel criterion for neutral current differential protection is presented in this paper, which is based on a full research into traditional neutral current differential protection schemes used in transmission lines. Compared to traditional criteria, the novel one is able to increase sensitivity for an internal fault and remain stable for an external fault. Simulation studies show that the sensitivity...
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