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Building Principles of High Voltage Relay Protection
Nguyen Doan Quoc Anh,Tran Hoang Quang Minh,Nguyen Quang Dung,Shmoilov A.V 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.10
Main characteristic of relay protection (RP) is selectivity. The fullest realization of this characteristic is given on principle operation of differential protection. On the ground of this reason and analysis of the arc monitoring the short circuits, two principles of the building RP are formulated: usual metric (which is used for building all the types existing RP with measuring relays) and proposed logical principle (on which is built arc protection, on flash of the electric arc at short circuits (SC)). The differential metric principle RP is proved to be the most appropriate for building RP on logical scheme. There are compared factors existing RZ by the approximation to logical principle of the building RP. As special principle of the building RP is distinguished the distance protection. The advantage the logical scheme of the building RZ are discussed in contrast with existing metric.
The Analysis and Principle Setting of High-Voltage Relaying Systems
Tran Hoang Quang Minh,Nguyen Doan Quoc Anh,Nguyen Quang Dung,Shmoilov A.V 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.11
In this paper, the analysis of the relay devices and systems performance (and another monitoring, controlling systems) to properties of the automatic power system objects is represented. The paradoxes of using a number of relaying are considered. Some events graduated from the current such as: prevention of violation of stability, liquid on of an asynchronous regime, differential guards of transformers and auto transformers are proposed and analyzed. The recommendations for operation increasing, selectivity and sensitivity of systems properties improving are given.