Second-Order Harmonic Current Propagation Characteristics in Two-Stage Inverter Based on Virtual Impedance
The instantaneous output power of a two-stage single-phase inverter pulsates at twice the output voltage frequency, generating second harmonic current(SHC) in the front-end dc-dc converter. The optimization of loop control of the front-end dc-dc converter is an effective and costless method for this...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Editorial Department of Journal of Nantong University (Natural Science Edition)
2021-03-01
|
| Series: | Nantong Daxue xuebao. Ziran kexue ban |
| Subjects: | |
| Online Access: | https://ngzke.cbpt.cnki.net/portal/journal/portal/client/paper/61a32c0e30685e6eb31ab41402309d26 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The instantaneous output power of a two-stage single-phase inverter pulsates at twice the output voltage frequency, generating second harmonic current(SHC) in the front-end dc-dc converter. The optimization of loop control of the front-end dc-dc converter is an effective and costless method for this problem. This study gives equivalent circuit model of the front-end dc-dc converter with single voltage loop control and voltage current dual-loop control first. Then, the propagation characteristic of the SHC is analyzed from the point of virtual impedance. On this basis,this study proposes a synthesis of different control strategies for SHC reduction and points out the limitations of them.In the view of this, this paper presents corresponding optimization methods. Finally, a 1 500-VA prototype model is built and simulated, and the simulation results are presented to verify the effectiveness of the analysis and the optimization. |
|---|---|
| ISSN: | 1673-2340 |