Abstract
An active grid impedance cancellator is proposed to suppress the effect of the grid disturbance and stabilize the distributed power generation (DPG) grid-connected inverters operating under the weak grid. Harmonic interaction between the DPG inverter and the grid is thereby avoided owing to the cancellation of equivalent grid impedance. The impedance cancellator composed of a full-bridge dc-ac converter without passive filtering elements is connected in series at the inverter output to simulate a negative virtual grid impedance. In addition, an active damping function is integrated to suppress the filter resonance of the inverter. In the paper, the system configuration and the control strategy of the impedance cancellator are introduced. The power consumption of the cancellator is also evaluated. A single-phase grid-connected inverter prototype has been built to verify the effectiveness of the proposed method. The experimental results show a good agreement with the theoretical knowledge.
| Original language | English |
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| Title of host publication | 2018 IEEE Applied Power Electronics Conference and Exposition (APEC) |
| Publisher | IEEE |
| Pages | 2368-2373 |
| ISBN (Electronic) | 9781538611807 |
| DOIs | |
| Publication status | Published - Mar 2018 |
| Event | 33rd Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2018) - Henry B. Gonzalez Convention Center, San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018 http://www.apec-conf.org/ |
Publication series
| Name | Annual IEEE Conference Applied Power Electronics Conference and Exposition (APEC) |
|---|---|
| Publisher | IEEE |
| ISSN (Electronic) | 2470-6647 |
Conference
| Conference | 33rd Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2018) |
|---|---|
| Country/Territory | United States |
| City | San Antonio |
| Period | 4/03/18 → 8/03/18 |
| Internet address |
Research Keywords
- Active damping
- Grid impedance cancellator
- Inverter
- LCL filter