Assessment of multipulse converter average models for stability studies using a quasistationary small-signal technique

This paper presents a capability assessment of multipulse converters average models to perform stability studies in commercial-aircraft electrical power systems. Particularly, a quasistatic small-signal analysis technique is employed to determine unstable quiescent operating points, which are later verified on the average model by means of small-signal output impedance measurement and transient simulations. The effectiveness of the average model was tested up to its limit, being in effect capable of predicting the subtlest of instabilities, such as the ones that could occur during line commutation. The paper presents a detailed description of the averaging method employed, as well as an in-depth description of the quasistationary small-signal technique used for the stability analyses. Results obtained, namely transient and frequency domain simulations using Synopsys' Saber/sup R/, validate the theoretical considerations disclosed.

[1]  M. H. Taha,et al.  Variable frequency to constant frequency converter (VFCFC) for aircraft applications , 2002 .

[2]  R. D. Middlebrook,et al.  Input filter considerations in design and application of switching regulators. , 1976 .

[3]  G. R. Karnath,et al.  A novel autotransformer based 18-pulse rectifier circuit , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[4]  D. A. Paice,et al.  Power Electronics Converter Harmonics , 1995 .

[5]  D. Borojevic,et al.  Modeling and control of a synchronous generator with an active DC load , 2000 .

[6]  D. Boroyevich,et al.  Comparison of prospective topologies for aircraft autotransformer-rectifier units , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[7]  Robert L. Steigerwald,et al.  An AC-to-DC Converter with High Quality Input Waveforms , 1983, IEEE Transactions on Industry Applications.

[8]  Dushan Boroyevich,et al.  Analysis of subsystem integration in aircraft power distribution systems , 1999, ISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349).

[9]  D. Boroyevich,et al.  Average modeling of a hexagon transformer and rectifier , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[10]  Keith Corzine,et al.  Transient and dynamic average-value modeling of synchronous machine fed load-commutated converters , 1996 .