Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications

Jahan, Hossein Khoun; Kurdkandi, Naser Vosoughi; Abapour, Mehdi; Zare, Kazem; Hosseini, Seyed Hossein; Yang, Yongheng; Blaabjerg, Frede

doi:10.3390/math8101716

Open AccessArticle

Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications

by

Hossein Khoun Jahan

^1,*

,

Naser Vosoughi Kurdkandi

¹

,

Mehdi Abapour

¹,

Kazem Zare

¹,

Seyed Hossein Hosseini

¹,

Yongheng Yang

²

and

Frede Blaabjerg

^2,*

¹

Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz 51368, Iran

²

Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark

^*

Authors to whom correspondence should be addressed.

Mathematics 2020, 8(10), 1716; https://doi.org/10.3390/math8101716

Submission received: 9 August 2020 / Revised: 8 September 2020 / Accepted: 23 September 2020 / Published: 7 October 2020

(This article belongs to the Special Issue Advanced Modeling and Research in Hybrid Microgrid Control and Optimization)

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Abstract

The cascaded multilevel inverter (CMI) is one type of common inverter in industrial applications. This type of inverter can be synthesized either as a symmetric configuration with several identical H-bridge (HB) cells or as an asymmetric configuration with non-identical HB cells. In photovoltaic (PV) applications with the CMI, the PV modules can be used to replace the isolated dc sources; however, this brings inter-module leakage currents. To tackle the issue, the single-source CMI is preferred. Furthermore, in a grid-tied PV system, the main constraint is the capacitive leakage current. This problem can be addressed by providing a common ground, which is shared by PV modules and the ac grid. This paper thus proposes a topology that fulfills the mentioned requirements and thus, CMI is a promising inverter with wide-ranging industrial uses, such as PV applications. The proposed CMI topology also features high boosting capability, fault current limiting, and a transformerless configuration. To demonstrate the capabilities of this CMI, simulations and experimental results are provided.

Keywords: cascaded multilevel inverter; photovoltaic; leakage current

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MDPI and ACS Style

Jahan, H.K.; Kurdkandi, N.V.; Abapour, M.; Zare, K.; Hosseini, S.H.; Yang, Y.; Blaabjerg, F. Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications. Mathematics 2020, 8, 1716. https://doi.org/10.3390/math8101716

AMA Style

Jahan HK, Kurdkandi NV, Abapour M, Zare K, Hosseini SH, Yang Y, Blaabjerg F. Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications. Mathematics. 2020; 8(10):1716. https://doi.org/10.3390/math8101716

Chicago/Turabian Style

Jahan, Hossein Khoun, Naser Vosoughi Kurdkandi, Mehdi Abapour, Kazem Zare, Seyed Hossein Hosseini, Yongheng Yang, and Frede Blaabjerg. 2020. "Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications" Mathematics 8, no. 10: 1716. https://doi.org/10.3390/math8101716

APA Style

Jahan, H. K., Kurdkandi, N. V., Abapour, M., Zare, K., Hosseini, S. H., Yang, Y., & Blaabjerg, F. (2020). Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications. Mathematics, 8(10), 1716. https://doi.org/10.3390/math8101716

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Common-Ground-Type Single-Source High Step-Up Cascaded Multilevel Inverter for Transformerless PV Applications

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