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This paper presents a biasing algorithm that corrects distance element impedance measurements under infeed conditions present in both multi-terminal transmission networks and transmission networks supported by dynamic reactive compensators e.g. Static Var Compensator (SVC) and Static Synchronous Compensators (STATCOM). The biasing of distance protection elements requires that the relays at specific...
The U.S. Navy is investigating use of medium-voltage direct current (MVDC) for shipboard electrical distribution. MVDC architecture has the possibility of fault detection and response that is faster than comparable AC (MVAC) systems. Theoretical MVDC response times are on the order of 1–5 µs. The feasibility of 5 µs for fault detection and mitigation in a shipboard MVDC system is evaluated analytically...
Power transformers can experience large inrush currents upon energization, the severity of which depends on the source strength, the angle of the applied voltage at energization, and the residual flux of the transformer. A novel inrush current reduction strategy has been investigated which involves setting the transformer's residual flux. Testing of this strategy required a measurement system capable...
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