Abstract
In DC microgrids, constant power loads (CPLs) reduce the effective damping of the DC-DC converter and may induce destabilizing effects into the DC-DC converter. To overcome such problems regarding CPL and ensure large-signal stability of DC-DC converters in DC microgrids, some feedforward terms are added to V-I droop-based dual-loop controller for a DC-DC converter based on the large-signal model. It is proven that the feedforward terms can not only improve the transient response but also guarantee the exponential stability of the closed-loop system in the whole operating range in regards to a large-signal manner, which is verified by using a singular perturbation model. Moreover, a disturbance observer is designed to estimate the output current, thereby enabling the removal of the current measurement sensor. The proposed technique can be easily plugged into a pre-defined V-I droop-based dual-loop controller without an additional sensor being required. Ultimately, both simulation and experimental tests verify the effectiveness of the proposed method.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 9347789 |
| Tidsskrift | I E E E Transactions on Energy Conversion |
| Vol/bind | 36 |
| Udgave nummer | 3 |
| Sider (fra-til) | 2534-2544 |
| Antal sider | 11 |
| ISSN | 0885-8969 |
| DOI | |
| Status | Udgivet - feb. 2021 |
FN’s Verdensmål
Denne publikation bidrager til følgende verdensmål
