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Presentation
A modulation algorithm for inter-phase balancing in CHB Converters
Author/s | Montero-Robina, Pablo
Gordillo Álvarez, Francisco |
Department | Universidad de Sevilla. Departamento de Ingeniería de Sistemas y Automática |
Publication Date | 2017-04 |
Deposit Date | 2021-08-04 |
Published in |
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ISBN/ISSN | 978-1-5090-4963-9 2166-9546 |
Abstract | This paper presents a simple modulation algorithm which accomplishes the voltage balance across the capacitors of a Cascaded H-bridge (CHB) converter using zero voltage injection. CHB converters are widely used in renewable ... This paper presents a simple modulation algorithm which accomplishes the voltage balance across the capacitors of a Cascaded H-bridge (CHB) converter using zero voltage injection. CHB converters are widely used in renewable energy production, especially in solar plants due to their modularity. This advantage can also become a problem when the power generated by the solar cell or consumed by a load is not equal among the three phases, leading to an unbalanced situation. The inter-phase unbalance refers to the voltage differences among the capacitors of different phases, for which a well-known technique to solve it consists of injecting a zero sequence voltage according to the power distribution. A simple modulation algorithm, which uses it, is presented in this paper including a mathematical proof. The proposed algorithm has been tested by simulation with a five-level CHB converter. At the end of the paper, a modification is introduced to improve the converter efficiency. |
Funding agencies | Ministerio de Economía y Competitividad (MINECO). España |
Project ID. | DPI2013-41891-R
DPI2016-75294-C2-1-R |
Citation | Montero-Robina, P. y Gordillo, F. (2017). A modulation algorithm for inter-phase balancing in CHB Converters. En 2017 11th IEEE International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) (133-138), Cádiz: IEEE. |
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