Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration

Yifan Yu, Georgios Konstantinou, Christopher D. Townsend, Vassilios G. Agelidis

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)603-613
Number of pages11
JournalIET Renewable Power Generation
Volume11
Issue number5
DOIs
Publication statusPublished - 12 Apr 2017
Externally publishedYes

Fingerprint

Dive into the research topics of 'Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration'. Together they form a unique fingerprint.

Cite this