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Multilevel inverter neutral-point voltage sensor diagnostic based on the Extended Kalman Filter

Abstract

A new algorithm for neutral point voltage imbalance estimation in DC link of the three-level (3L) neutral point clamped (NPC) voltage source inverter (VSI) is proposed. Application of the proposed algorithm does not require any additional sensors. The unbalanced voltage calculation is based on the information derived from the inverter output measured currents and from the knowledge of the load model parameters. In order to estimate the unbalanced voltage extended Kalman filter is used to model non-stationary object. Proposed algorithm can be used for sensorless operation without voltage sensor at the neutral point and can be used also for the voltage sensor diagnostic purposes by comparison of the estimated and measured values. Proposed algorithm implementation provides redundancy and improved reliability of the inverter.

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Details

Category:
Conference activity
Type:
publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Title of issue:
4th International Conference on Power Engineering Energy and Electrical Drives strony 1676 - 1683
Language:
English
Publication year:
2013
Bibliographic description:
Szczepankowski P., Kołodziejek P.: Multilevel inverter neutral-point voltage sensor diagnostic based on the Extended Kalman Filter// 4th International Conference on Power Engineering Energy and Electrical Drives/ Istambuł, Turcja: 2013 Fourth International Conference on Power Engineering, Energy and Electrical Drives , 2013, s.1676-1683
DOI:
Digital Object Identifier (open in new tab) 10.1109/powereng.2013.6635869
Verified by:
Gdańsk University of Technology

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