DC‑link voltage balance control method considering the wide regulation range in SOR for single‑phase cascaded H‑bridge rectifier

Xin Wang; Chenchen Wang; Changbin Gu

DC‑link voltage balance control method considering the wide regulation range in SOR for single‑phase cascaded H‑bridge rectifier

Xin Wang

Chenchen Wang

Changbin Gu

Vol. 20, No. 1, pp. 109-120, Jan. 2020

10.1007/s43236-019-00003-8

Steady-state operating region (SOR)

Cascaded H-bridge rectifier (CHBR)

Balance methods

Degree of imbalance

Abstract

In this paper, a DC-link voltage balance control method that considers the wide regulation range in the steady-state operating region is proposed for a single-phase cascaded H-bridge rectifier. A mathematical model of the DC-link voltage is also established while considering the imbalance caused by the inconsistency of the active power absorbed and consumed by the cell. On the basis of the steady-state operating region of the cascaded H-bridge rectifier, the operating loci of different balance methods are analyzed and a novel balance method is proposed. The DC-link voltage regulation range of the proposed method is then compared with that of two other commonly used methods based on the operating locus in the steady-state operating region. The comparison results show that the proposed method has the widest regulation range in the steady-state operating region wherever the cascaded H-bridge rectifier is operated. The experimental results also verify the effectiveness and superiority of the proposed method.

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Cite this article

[IEEE Style]

X. Wang, C. Wang, C. Gu, "DC‑link voltage balance control method considering the wide regulation range in SOR for single‑phase cascaded H‑bridge rectifier," Journal of Power Electronics, vol. 20, no. 1, pp. 109-120, 2020. DOI: 10.1007/s43236-019-00003-8.

[ACM Style]

Xin Wang, Chenchen Wang, and Changbin Gu. 2020. DC‑link voltage balance control method considering the wide regulation range in SOR for single‑phase cascaded H‑bridge rectifier. Journal of Power Electronics, 20, 1, (2020), 109-120. DOI: 10.1007/s43236-019-00003-8.