Switching Ripple Harmonics Attenuation in DFIG and Matrix Converter-Based WECS

Electronics

Gytis Petrauskas¹  Gytis Svinkunas² 

[1] Department of Automation, Faculty of Electrical and Electronics Engineering, Kaunas University of Technology, 51394 Kaunas, Lithuania;Department of Electric Power Systems, Faculty of Electrical and Electronics Engineering, Kaunas University of Technology, 51394 Kaunas, Lithuania;

关键词: AC-AC power converters;    frequency converters;    passive filters;    harmonics;   

DOI  :  10.3390/electronics10212589

来源: DOAJ

【 摘 要 】

The analysis presented in this paper is focused on the harmonics distortion damping in the case of bidirectional power-flow of the electronics device—matrix converter as an interface between two power sources. Bidirectional energy flow takes place in the matrix converter that is used in renewables, hybrid transformers, microgrids, etc. It is observed that the matrix converter generates sinusoidal voltage with some amount of harmonic distortion and worsens in the quality of power in the utility grid. Taking into account the bi-directional energy flow and the matrix converter operation principle, four key requirements for the filters are formulated. Six theoretically possible filter topologies are investigated for compliance with these requirements. Two of the filter topologies are recognized as complying with these requirements and applicable for the switching ripple harmonics damping in the utility grid connected matrix converter in the case of bidirectional power flow. The suitability of these topologies was verified by MATLAB/Simulink simulation. Using the proper filter topology will significantly reduce the size, weight and cost of the components of the filter, as well as the utility grid’s pollution by switching ripple harmonics. It is appropriate to apply such filters to matrix converters that operate in wind turbines installed in doubly fed induction generators. These filters should also be used in hybrid transformers and other high-power devices with matrix converters.

【 授权许可】

Unknown