Abstract
Three-phase power factor correction (PFC) power supplies are commonly used to convert ac power from a three-phase grid to a regulated dc voltage. However, the non-ideal power grid may drive the converter to enter a low-frequency instability region. In this paper, a low-frequency instability phenomenon in three-phase PFC power supplies is reported. The converter can also be regarded as exhibiting a Hopf-type bifurcation in which the dc output voltage oscillates at 150 Hz, and large amount of harmonics appear on the line current. We develop an averaged model of the grid-converter system to predict the low-frequency instability. Additionally, as a result of the emergence of low-frequency oscillation, the stability boundary leading to a catastrophic bifurcation changes dramatically. These phenomena are verified with realistic cycle-by-cycle simulations.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012 |
| Pages | 151-154 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - 1 Dec 2012 |
| Event | 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012 - Dalian, Liaoning, China Duration: 18 Oct 2012 → 21 Oct 2012 |
Conference
| Conference | 5th International Workshop on Chaos-Fractals Theories and Applications, IWCFTA 2012 |
|---|---|
| Country/Territory | China |
| City | Dalian, Liaoning |
| Period | 18/10/12 → 21/10/12 |
ASJC Scopus subject areas
- Computational Theory and Mathematics
- Applied Mathematics