Abstract
Multisampling control provides an attractive way to reduce the control delays in LCL-type grid-connected inverters, and thereby the bandwidth and stability margin will be improved. However, high frequency switching harmonics is introduced in the control loop when the inverter current is selected as a feedback. In order to investigate the effect of high frequency switching harmonics, the internal relationship between double-update pulse width modulation (PWM) and four-update PWM is deduced through the geometric analysis. Compared with the double-update PWM, a sampling instant is shifted a quarter of the switching period during each switching period. Hence the non-average value is sampled and low-order aliased harmonics will appear in the grid current. Finally, the theoretical analysis is verified through the simulation and experimental results.
| Original language | English |
|---|---|
| Title of host publication | ECCE 2020 - IEEE Energy Conversion Congress and Exposition |
| Number of pages | 7 |
| Publisher | IEEE Signal Processing Society |
| Publication date | 11 Oct 2020 |
| Pages | 4329-4335 |
| Article number | 9235724 |
| ISBN (Electronic) | 9781728158266 |
| DOIs | |
| Publication status | Published - 11 Oct 2020 |
| Event | 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States Duration: 11 Oct 2020 → 15 Oct 2020 |
Conference
| Conference | 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 |
|---|---|
| Country/Territory | United States |
| City | Virtual, Detroit |
| Period | 11/10/2020 → 15/10/2020 |
| Sponsor | IEEE Industrial Application Society (IAS), IEEE Power Electronics Society (PELS) |
| Series | IEEE Energy Conversion Congress and Exposition |
|---|---|
| ISSN | 2329-3721 |
Bibliographical note
Publisher Copyright:© 2020 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Keywords
- aliasing
- low frequency distortion
- Multisampling
- sampling instant shift