Distributed Induction Generators: 3 - Phase Bolted Short - Circuit Fault Currents

Sulawa, T.; Zabar, Z.; Czarkowski, Dariusz; Ten-Ami, Y.; Birenbaum, L.; Lee, S.; Bury, W.E.

doi:10.1109/eurcon.2007.4400339

Cited by 1 publication

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“…The existence of the current second part depends on the induction generator connection scheme. Short-circuit current transient values can be approximately determined by using an exponential expression with three components, such as equation 1 shows [7], [9], [10]:…”

Section: A Induction Machine Excited By Remnant Magnetismmentioning

confidence: 99%

Distributed generation: Short circuit current supplied for induction generators

Morcos

Gómez

2008

2008 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

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Magnitude and duration of the short-circuit current supplied by induction generators is a matter of concern. Induction generators are mainly applied to produce electricity through wind turbines. Several papers showing analytical studies on short-circuit current have been published, but just a few with experimental results. Experimental results of 4 to 10 kW induction generator are presented. Four operating principles were investigated: remnant magnetism excitation, capacitor excitation, dc rotor excitation, and double feed. Short-circuit current supplied by remnant magnetism excited machine is presented, showing restart current after fault cleaning. Current first peak magnitude is ruled by the electromagnetic time constant, but current decaying part depends of electromagnetic and mechanical time constants, which can be estimated through simple tests. Good accuracy between analytical and experimental values is presented. Research shows that induction machine short-circuit contribution is closely related to excitation type and that the used initial and damped values represent an overestimation.

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Section: A Induction Machine Excited By Remnant Magnetismmentioning

confidence: 99%