Control and modulation scheme for a Cascaded H-Bridge multi-level converter in large scale photovoltaic systems

C. D. Townsend, T. J. Summers, R. E. Betz

Research output: Chapter in Book/Conference paperConference paper

59 Citations (Scopus)

Abstract

Multi-level Cascaded H-bridge (CHB) converters are ideal for implementing large scale photovoltaic systems. The improved quality of the voltage waveforms, high efficiency and ability to employ multiple Maximum Power Point Tracking (MPPT) algorithms are just some of the advantages. In this paper a three-phase CHB converter supplied with photovoltaic arrays is considered. A control and modulation structure based on Model Predictive Control (MPC) is described. The scheme inherently controls the DC link voltages while also providing the ability to modify any of those voltages to meet MPPT requirements. This avoids the cost and added complexity of extra DC/DC converters that are typically required to keep the DC link voltages uniform. Simulation and experimental results are presented that confirm the correct operation of the proposed approach.

Original languageEnglish
Title of host publication2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
Pages3707-3714
Number of pages8
DOIs
Publication statusPublished - 17 Dec 2012
Externally publishedYes
Event4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh, NC, United States
Duration: 15 Sep 201220 Sep 2012

Conference

Conference4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
CountryUnited States
CityRaleigh, NC
Period15/09/1220/09/12

    Fingerprint

Cite this

Townsend, C. D., Summers, T. J., & Betz, R. E. (2012). Control and modulation scheme for a Cascaded H-Bridge multi-level converter in large scale photovoltaic systems. In 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012 (pp. 3707-3714). [6342475] https://doi.org/10.1109/ECCE.2012.6342475