Abstract
This paper presents the control of a grid-interfacing inverter with integrated voltage unbalance correction. It is proposed to add an additional function to the inverter to decrease the negative-sequence voltage at the point of connection with the utility grid. Based on a symmetric sequence voltage decomposition and using an improved multi-variable filter, the grid-interfacing inverter intentionally absorbs a small amount of negative-sequence current from the grid, thereby helping to correct the negative-sequence voltage. Although the amplitude reduction contributed by each individual inverter system is small compared to the total negative-sequence component, grid-interfacing inverter modules can collectively achieve substantial results in the grid. The integrated function and proposed control has been verified in simulations and by experiments on a laboratory prototype.
| Original language | English |
|---|---|
| Title of host publication | IEEE Power Electronics Specialists Conference, 2008 : PESC 2008 ; 15 - 19 June 2008, Capsis Hotel and Convention Center, Rhodes, Greece ; proceedings |
| Place of Publication | Piscataway |
| Publisher | Institute of Electrical and Electronics Engineers |
| Pages | 310-316 |
| ISBN (Print) | 978-1-4244-1667-7 |
| DOIs | |
| Publication status | Published - 2008 |