Positional protection of transmission systems using Global Positioning System

Citation
Zqq. Bo et al., Positional protection of transmission systems using Global Positioning System, IEEE POW D, 15(4), 2000, pp. 1163-1168
Citations number
14
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON POWER DELIVERY
ISSN journal
08858977 → ACNP
Volume
15
Issue
4
Year of publication
2000
Pages
1163 - 1168
Database
ISI
SICI code
0885-8977(200010)15:4<1163:PPOTSU>2.0.ZU;2-G
Abstract
This paper presents a new technique for the protection of power transmissio n systems by using the Global Positioning System (GPS) and fault generated transients. In the scheme, the relay contains a fault transient detection s ystem together with a communication unit, which is connected to the power l ine through the high voltage coupling capacitors of the CVT. Relays are ins talled at each busbar in a transmission network, These detect the fault gen erated high frequency voltage transient signals and record the time instant corresponding to when the initial travelling wave generated by the fault a rrives at that busbar, The communication unit is used to transmit and recei ve coded digital signals of the Local information to and from the associate d relay(s) in the system. At each substation, the relays determine the loca tion of the fault by comparing the GPS time stamps measured Locally with th ose received from the adjacent substations. Extensive simulation studies pr esented in the paper demonstrate the feasibility of the scheme.