Stability conditions for multi-converter power systems

The development of power electronic system has brought the application of solid-state power converters in a variety of new fields of application. For example, the number of power converter varies from a few converters in a conventional car to hundreds in a international space station. A multi-converter power system is composed by the presence of different solid-state power converters integrated together in order to form an interconnected system, generally very complex. In this work stability conditions are investigated, starting at first from a conventional mathematical model derived using state-space averaging method. Preliminary experimental tests, however, proved the importance of parasitic parameters on the stability of the whole system. A more complete model that takes into account real parameters is then introduced, in order to obtain more precise predictions on critical load values. Final experimental test verified the validity of the model and the accordance with predictions.

[1]  Teuvo Suntio,et al.  ynamics of a Converter with a Constant Power Load , 1998 .

[2]  Mehrdad Ehsani,et al.  Multi-converter power electronic systems: definition and applications , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[3]  Mehrdad Ehsani,et al.  Stability analysis of large DC solid-state power systems for space , 2000 .

[4]  Slobodan Cuk,et al.  A general unified approach to modelling switching-converter power stages , 1976, 1970 IEEE Power Electronics Specialists Conference.

[5]  Ali Emadi,et al.  Modeling and analysis of multiconverter DC power electronic systems using the generalized state-space averaging method , 2004, IEEE Transactions on Industrial Electronics.

[6]  Ali Emadi,et al.  Dynamics and control of multi-converter DC power electronic systems , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).