Title :
Digital bus-zone protection
Author :
Kumar, Anil ; Hansen, Peter
Author_Institution :
Siemens AG, Erlangen, Germany
Abstract :
A numerical bus-zone protection scheme that overcomes the drawbacks of analog units was designed and constructed. Both high- and low-impedance measurement schemes for us protection relays were investigated. For the numerical bus protection designed, low impedance measurement schemes are used. The basic hardware structure used in the digital bus-zone protection scheme and two modes of realizing breaker fail protection are described. Hardware and software self-monitoring, design tests and operational experience, and customer training are briefly discussed.<>
Keywords :
circuit breakers; power system computer control; power system measurement; power system protection; relay protection; breaker fail protection; design; hardware; low impedance measurement schemes; numerical bus-zone protection; operational experience; power system computer control; relays; software; training; Circuit faults; Europe; Impedance measurement; Isolators; Logic testing; Manufacturing; Protection; Protective relaying; Relays; Voltage;
Journal_Title :
Computer Applications in Power, IEEE
