TY - JOUR

T1 - Grid Filter Design for a Multi-Megawatt Medium-Voltage Voltage Source Inverter

A1 - Rockhill,A.A.

A1 - Liserre,Marco

A1 - Teodorescu,Remus

A1 - Rodriguez,Pedro

AU - Rockhill,A.A.

AU - Liserre,Marco

AU - Teodorescu,Remus

AU - Rodriguez,Pedro

PB - I E E E

PY - 2011

Y1 - 2011

N2 - 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 <br/>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 <br/>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 <br/>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.

AB - 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 <br/>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 <br/>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 <br/>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.

UR - http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5601772

U2 - 10.1109/TIE.2010.2087293

DO - 10.1109/TIE.2010.2087293

JO - I E E E Transactions on Industrial Electronics

JF - I E E E Transactions on Industrial Electronics

SN - 0278-0046

IS - 4

VL - 58

SP - 1205

EP - 1217

ER -