Abstract
This paper investigates the mechanism behind the 2nd harmonic interaction of a transformer connected Voltage-Source Converter (VSC) under saturation conditions. The detail small-signal models of a saturated transformer and a VSC are derived considering their nonlinear behavior. It is revealed that the frequency coupling from the saturated transformer and the PLL in the VSC may form a positive feedback loop and give rise to a 2nd harmonic amplification. The harmonic amplification gain is established herein, which provides an accurate assessment of the 2nd harmonic interaction. This theoretical analysis is verified by a power hardware in the loop laboratory experiment.
Original language | English |
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Title of host publication | Proceedings of the IEEE International Power Electronics and Application Conference and Exposition (PEAC 2018) |
Number of pages | 6 |
Place of Publication | China |
Publisher | IEEE Press |
Publication date | Nov 2018 |
Pages | 1-6 |
ISBN (Print) | 978-1-5386-6055-3 |
ISBN (Electronic) | 978-1-5386-6054-6 |
DOIs | |
Publication status | Published - Nov 2018 |
Event | 2nd IEEE Power Electronics and Applications Conference and Exposition - Shenzhen, China Duration: 4 Nov 2018 → 7 Nov 2018 Conference number: 2nd http://www.peac-conf.org/ |
Conference
Conference | 2nd IEEE Power Electronics and Applications Conference and Exposition |
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Number | 2nd |
Country/Territory | China |
City | Shenzhen |
Period | 04/11/2018 → 07/11/2018 |
Internet address |
Keywords
- harmonic interaction
- transformer core saturation
- VSC
- PLL
- frequency coupling