A new type of differential feeder protection relay using the Global Positioning System for data synchronization
- 1 July 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Delivery
- Vol. 12 (3), 1090-1099
- https://doi.org/10.1109/61.636902
Abstract
This paper describes a new technique for sampling synchronisation in a numerical differential feeder protection relay. The protection uses a Global Positioning System satellite receiver for sampling synchronization at each end of the protected feeder. The EMTP/ATP power system simulator was used to simulate a typical distribution feeder with faults at various locations. The current signals generated at both ends of feeder were used to evaluate the performance of the protection. These tests were carried out using a protection simulator. The results illustrate the effect of current transformer saturation on the sensitivity and stability of the protection. Finally it is shown that a precisely synchronized differential protection is fast, selective and accurate. On an internal fault it provides a high operating sensitivity, whilst it remains stable on all external faults.Keywords
This publication has 4 references indexed in Scilit:
- A new approach to digital current differential protection for low and medium voltage feeder circuits using a digital voice-frequency grade communications channelIEEE Transactions on Power Delivery, 1994
- Synchronized sampling and phasor measurements for relaying and controlIEEE Transactions on Power Delivery, 1994
- Experimental evaluation of EMTP-based current transformer models for protective relay transient studyIEEE Transactions on Power Delivery, 1994
- Synchronized phasor measurements in power systemsIEEE Computer Applications in Power, 1993