Abstract
Three-phase converter systems can be prone to negative impedance instability of the DC-bus. This paper studies the dynamic interactions between the DC- and AC-sides of a current-controlled three-phase system in order to reveal possible risks of instability. The system is modelled by using a small-signal method from a viewpoint of the DC-side. Time delays due to pre-calculation and discretization are considered. The stability analyses are performed for the small-signal model. The results of the stability analyses are compared with time-domain simulations. Comparisons demonstrate good agreement. In addition, a stabilizing controller is developed for the example system. According to simulations, the proposed controller can stabilize the system.
| Original language | English |
|---|---|
| Title of host publication | The 16th European Conference on Power Electronics and Applications (EPE'14 ECCE Europe) |
| Place of Publication | Lappeenranta, Finland |
| Number of pages | 10 |
| ISBN (Electronic) | 978-1-4799-3014-2 |
| DOIs | |
| Publication status | Published - 26 Aug 2014 |
| MoE publication type | A4 Conference publication |
Keywords
- converter control
- modelling
- simulation
- voltage source inverter