Modelling of low inductive busbars for medium voltage three-level NPC inverter

Design of low inductive busbars for medium voltage Neutral Point Clamped (NPC) inverter is studied. In a hard-switched inverter the stray inductance causes various problems, such as over voltages, current unbalance, and possible resonance with DC-link capacitors. These problems lead to improper operation of the inverter and an increased level of electromagnetic interference (EMI). The laminated busbars are known to be a good solution for minimizing the stray inductance. It is important to estimate and minimize the stray inductance of the busbars in an early design stage. FLUX3D is used to compare three physical layouts and analyze the influence of the placement of the main circuit components on the inductance value.

[1]  Pedro Rodriguez,et al.  Medium voltage three-level converters for the grid connection of a multi-MW wind turbine , 2009, 2009 13th European Conference on Power Electronics and Applications.

[2]  Ranjan K. Behera,et al.  Simulation study of permanent magnet synchronous machine direct drive wind power generator using three level NPC converter system , 2009, 2009 IEEE Power Electronics and Machines in Wind Applications.

[3]  Xu Cai,et al.  A Novel Multi-level Medium Voltage Converter Designed for Medium Voltage Wind Power Generation System , 2010, 2010 Asia-Pacific Power and Energy Engineering Conference.

[4]  J. L. Coulomb,et al.  The finite element post-processor of FLUX3D (field computation package) , 1991 .

[5]  F. Profumo,et al.  Low stray inductance bus bar design and construction for good EMC performance in power electronic circuits , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[6]  M. P. Kazmierkowski,et al.  High-Performance Motor Drives , 2011, IEEE Industrial Electronics Magazine.

[7]  R. Cuzner,et al.  Three-level converter system , 2009, IEEE Industry Applications Magazine.

[8]  A. Tenconi,et al.  Low stray inductance bus bar design and construction for good EMC performance in power electronic circuits , 2000 .

[9]  A. E. Ruehii.  Inductance Calculations in a Complex Integrated Circuit Environment , 2002 .

[10]  G. L. Skibinski,et al.  Design methodology and modeling of low inductance planar bus structures , 2002 .

[11]  Bin Wu,et al.  High-Power Converters and ac Drives: Wu/High-Power Converters and ac Drives , 2006 .

[12]  Gerard Ledwich,et al.  Reduced layer planar busbar for voltage source inverters , 2002 .

[13]  G. Ledwich,et al.  A plane busbar impedance calculation using Maxwell's equations , 1999 .

[14]  Bin Wu,et al.  Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives , 2007, IEEE Transactions on Industrial Electronics.

[15]  Bin Wu,et al.  High-Power Converters and AC Drives , 2006 .

[16]  Joan Rocabert,et al.  Three-level three-phase neutral-point-clamped back-to-back converter applied to a wind emulator , 2009, 2009 13th European Conference on Power Electronics and Applications.

[17]  C. Hoer,et al.  Exact inductance equations for rectangular conductors with applications to more complicated geometries , 1965 .

[18]  J. Roudet,et al.  Modeling of low inductive busbar connections , 1996 .

[19]  J. Roudet,et al.  Busbar Design: How to Spare Nanohenries ? , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[20]  H. J. Beukes,et al.  Busbar design considerations for high power IGBT converters , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[21]  Xiangning He,et al.  Development of a compact 750KVA three-phase NPC three-level universal inverter module with specifically designed busbar , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).