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Abstract
The output currents of high-power Voltage Source Inverters (VSIs) are distorted by the switching harmonics and the background harmonics in the grid voltage. This paper presents an active harmonic filtering scheme for high-power, low-frequency switching VSIs with an additional auxiliary VSI. In the approach, the auxiliary low-power, high-frequency switching VSI is used to compensate both the switching harmonics of the high-power VSI and the low-order harmonics introduced by the distorted grid voltage. Impedance modeling and analysis are implemented for the hybrid VSI system, where the impacts of the grid impedance are analyzed. Different control targets are then formulated based on the analysis, and the corresponding control strategies are proposed. Lastly, simulations and experimental results are provided to validate the theoretical analysis and the performance of the proposed control strategy.
Original language | English |
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Article number | 8249540 |
Journal | I E E E Journal of Emerging and Selected Topics in Power Electronics |
Volume | 6 |
Issue number | 3 |
Pages (from-to) | 1355-1365 |
Number of pages | 11 |
ISSN | 2168-6777 |
DOIs | |
Publication status | Published - 1 Sept 2018 |
Keywords
- Voltage source inverter
- LC filtered VSI
- Impedance model
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HARMONY: HARMONY - Harmonic identification, mitigation and control in power electronics based power systems
Blaabjerg, F., Bak, C. L., Wang, X., Beres, R. N., Kwon, J., Gui, Y., Yoon, C. & Ebrahimzadeh, E.
01/02/2013 → 28/02/2018
Project: Research