- Title
- Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration
- Creator
- Yu, Yifan; Konstantinou, Georgios; Townsend, Christopher D.; Agelidis, Vassilios G.
- Relation
- IET Renewable Power Generation Vol. 11, Issue 5, p. 603-613
- Publisher Link
- http://dx.doi.org/10.1049/iet-rpg.2016.0621
- Publisher
- The Institution of Engineering and Technology (IET)
- Resource Type
- journal article
- Date
- 2017
- Description
- 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.
- Subject
- bridge circuits; power convertors; power grids; solar power stations
- Identifier
- http://hdl.handle.net/1959.13/1396039
- Identifier
- uon:33981
- Identifier
- ISSN:1752-1416
- Language
- eng
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