Improvement of Harmonic Losses and Power Quality Due to Matrix Converter Switching in Bidirectional Feeding Induction Generator Using Passive Hybrid Filter
Subject Areas : electrical and computer engineeringneda ghaderi 1 * , hoda naderi 2 , Mohammad عابدینی 3 , محمدحسن مرادی 4
1 - Department of Electrical Engineering, Faculty of Engineering, Islamic Azad University, Hamedan, Iran
2 - Department of Electrical Engineering, Faculty of Engineering, Islamic Azad University, Hamedan, Iran
3 -
4 - basu uni
Keywords: Bidirectional power induction generator, passive hybrid filter, direct power control, matrix converter,
Abstract :
In two-way feeding induction generators, the stator coils connect directly to the grid, while the rotor coils connect through power electronic converters. Back-to-Back (BTB) converters are commonly used but suffer from high losses, size, and weight due to their two-stage structure and DC link capacitor. This paper proposes replacing BTB converters with matrix converters for improved efficiency and compactness. The proposed method utilizes direct power control in the matrix converter for superior tracking of reference values during changes in both reference and turbine power. However, power electronic converters can introduce harmonics and power fluctuations. To address this, a passive hybrid filter is employed at the converter's input and output. This filter reduces active and reactive power fluctuations, improves Total Harmonic Distortion (THD), and enhances overall power quality. Additionally, the matrix converter's fast dynamic response to reference power changes eliminates the need for complex current control loops, resulting in a simpler structure with minimal calculations. The paper compares the performance of the proposed method (matrix converter with filter) against scenarios with and without a filter. The results demonstrate the filter's effectiveness and superiority in achieving optimal performance.
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