Ahead of Print article · Journal article
Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration
University of New South Wales1
University of Newcastle2
Department of Electrical Engineering, Technical University of Denmark3
Center for Electric Power and Energy, Centers, Technical University of Denmark4
Smart Electric Components, Center for Electric Power and Energy, Centers, Technical University of Denmark5
Photovoltaic (PV) power generation levels in the three phases of a multilevel cascaded H-bridge (CHB) converter can be significantly unbalanced, owing to different irradiance levels and ambient temperatures over a large-scale solar PV power plant. Injection of a zero-sequence voltage is required to maintain three-phase balanced grid currents with unbalanced power generation.
This study theoretically compares power balance capabilities of various zero-sequence injection methods based on two metrics which can be easily generalised for all CHB applications to PV systems. Experimental results based on a 430 V, 10 kW, three-phase, seven-level cascaded H-bridge converter prototype confirm superior performance of the optimal zero-sequence injection technique.
| Language: | English |
|---|---|
| Publisher: | IET |
| Year: | 2017 |
| Pages: | 603-613 |
| ISSN: | 17521424 and 17521416 |
| Types: | Ahead of Print article and Journal article |
| DOI: | 10.1049/iet-rpg.2016.0621 |
| ORCIDs: | Agelidis, Vassilios and 0000-0002-4313-1647 |
PV power generation bridge circuits cascaded H-bridge multilevel converter large-scale photovoltaic integration large-scale solar PV power plant multilevel CHB converter optimal zero-sequence voltage injection method power 10 kW power convertors power grids solar power stations three-phase balanced grid current three-phase seven-level CHB converter prototype unbalanced power generation voltage 430 V
