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This article presents an analysis of the behavior of the electrical frequency in Caracas during four major events of the year 2008. The frequency was computed from the voltage signals of the fault recorders. The events of April 29 and September 01 were faults in transmission lines of the National Grid, and the event of October 19 was the erratic trip of two main lines at 765kV (Guri-Malena). In these...
This paper presents a laboratory setup for transient testing of relays and GPS-synchronized devices. The setup relies on a unique, realistic scaled model of a small three substation system, along with its metering equipment. Lumped models of transmission lines are included that realistically represent the mutual couplings between the phases and asymmetries. Two phase shifters provide loading controllability...
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