Precise time and time interval applications to electric power systems

摘要: Abstract : There are many applications of precise time and interval (frequency) in operating modern electric power systems. Many generators customer loads operated parallel. The reliable transfer electrical to the consumer partly depends on measuring system frequency consistently locations. internal oscillators widely dispersed units must be syntonized. Elaborate protection control systems guard high voltage equipment from short open circuits. For highest reliability service, engineers need study all operations. Precise timekeeping networks aid analysis operations by synchronizing clocks recording instruments. Utility want reproduce events that caused loss service customers. can synchronize protective relay test-sets. dependable large motors remain close speed synchronism. stable response a perturbations is critical continuity service. Research shows measurement state vector monitoring stability. If operators know lightning storm approaching transmission line or transformer; they modify strategies. Knowledge location circuit fault re-energizing line. One technique requires synchronized one microsecond (microsecond). Current research seeks find out if improve operation.