- Title
- Delta-connected cascaded H-bridge multilevel converters for large-scale photovoltaic grid integration
- Creator
- Yu, Yifan; Konstantinou, Georgis; Townsend, Christopher D.; Aguilera, Ricardo P.; Agelidis, Vassillios G.
- Relation
- IEEE Transactions on Industrial Electronics Vol. 64, Issue 11, p. 8877-8886
- Publisher Link
- http://dx.doi.org/10.1109/TIE.2016.2645885
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2017
- Description
- The cascaded H-bridge (CHB) converter is becoming a promising candidate for use in next generation large-scale photovoltaic (PV) power plants. However, solar power generation in the three converter phase-legs can be significantly unbalanced, especially in a large geographically-dispersed plant. The power imbalance between the three phases defines a limit for the injection of balanced three-phase currents to the grid. This paper quantifies the performance of, and experimentally confirms, the recently proposed delta-connected CHB converter for PV applications as an alternative configuration for large-scale PV power plants. The required voltage and current overrating for the converter is analytically developed and compared against the star-connected counterpart. It is shown that the delta-connected CHB converter extends the balancing capabilities of the star-connected CHB and can accommodate most imbalance cases with relatively small overrating. Experimental results from a laboratory prototype are provided to validate the operation of the delta-connected CHB converter under various power imbalance cases.
- Subject
- AC–DC power converters; cascaded H-bridge (CHB) converter; multilevel converter; photovoltaic (PV)
- Identifier
- http://hdl.handle.net/1959.13/1350082
- Identifier
- uon:30486
- Identifier
- ISSN:0278-0046
- Language
- eng
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