Abstract
The output voltage quality of some of the single-phase multilevel inverters can be improved when their dc-link voltages are regulated asymmetrically. Symmetrical and asymmetrical multilevel diode-clamped inverters have the problem of dc-link capacitor voltage balancing, especially when power factor of the load is close to unity. In this paper, a new single-inductor multi-output dc/dc converter is proposed that can control the dc-link voltages of a single-phase diode-clamped inverter asymmetrically to achieve voltage quality enhancement. The circuit of the presented converter is explained and the main equations are developed. A control strategy is proposed and explained in details. To validate the versatility of the proposed combination of the suggested dc–dc converter and the asymmetrical four-level diode-clamped inverter (ADCI), simulations and experiments have been directed. It is concluded that the proposed combination of introduced multioutput dc–dc converter and single-phase ADCI is a good candidate for power conversion in residential photovoltaic (PV) utilization.
| Original language | English |
|---|---|
| Journal | I E E E Transactions on Power Electronics |
| Volume | 25 |
| Issue number | 10 |
| Pages (from-to) | 2507-2520 |
| Number of pages | 14 |
| ISSN | 0885-8993 |
| DOIs | |
| Publication status | Published - Oct 2010 |
Keywords
- Disturbance
- Dynamic behavior
- Input voltage disturbance
- Multi-output DC-DC converters