Grid filter design for a multi-megawatt medium-voltage voltage source inverter
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hdl:2117/11425
Tipus de documentArticle
Data publicació2010-10-14
EditorIEEE Press. Institute of Electrical and Electronics Engineers
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
This paper describes the design procedure and
performance of an LCL grid filter for a medium-voltage neutral
point clamped (NPC) converter to be adopted for a multimegawatt
wind turbine. The unique filter design challenges in this
application are driven by a combination of the medium voltage
converter, a limited allowable switching frequency, component
physical size and weight concerns, and the stringent limits
for allowable injected current harmonics. Traditional design
procedures of grid filters for lower power and higher switching
frequency converters are not valid for a multi-megawatt filter
connecting a medium-voltage converter switching at low frequency
to the electric grid. This paper demonstrates a frequency
domain model based approach to determine the optimum filter
parameters that provide the necessary performance under all
operating conditions given the necessary design constraints. To
achieve this goal, new concepts such as virtual harmonic content
and virtual filter losses are introduced. Moreover, a new passive
damping technique that provides the necessary damping with
low losses and very little degradation of the high-frequency
attenuation is proposed.
CitacióRockhill, A.A. [et al.]. Grid filter design for a multi-megawatt medium-voltage voltage source inverter. "IEEE transactions on industrial electronics", 14 Octubre 2010, p. 1-13.
ISSN0278-0046
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