Three‑mode one‑cycle controlled current‑source single‑stage multi‑input high‑frequency‑link inverter

Yanhui Qiu; Daolian Chen

Three‑mode one‑cycle controlled current‑source single‑stage multi‑input high‑frequency‑link inverter

Yanhui Qiu

Daolian Chen

Vol. 23, No. 1, pp. 149-160, Jan. 2023

10.1007/s43236-022-00517-8

Multi-input inverter

High-frequency-link

Current-source inverter

Three-mode one-cycle modulation

Three-input

Abstract

A current-source single-stage multi-input high-frequency-link grid-connected inverter and a three-mode one-cycle control strategy are proposed and deeply investigated in this paper. The inverter contains multiple current-source inverting units, a multi-input high-frequency transformer, and a cycloconverter. It achieves single-stage power conversion and high-frequency galvanic isolation with a simple circuit structure. The control strategy adds a by-pass switch to the energy storage inductor. It has energy-storing, energy-releasing, and three by-pass operation modes in a low frequency cycle. Through calculating the energy-releasing duty cycle in real time, the magnetic saturation problem of current-source inverters is solved and the output waveform quality is greatly improved. Soft-switching of the converter, a transfer function block diagram, and the design of the main circuit parameters are achieved. The simulation of a three-input inverter and experiment on a two-input inverter verify the feasibility and advancement of the proposed circuit topology and control strategy.

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Cite this article

[IEEE Style]

Y. Qiu and D. Chen, "Three‑mode one‑cycle controlled current‑source single‑stage multi‑input high‑frequency‑link inverter," Journal of Power Electronics, vol. 23, no. 1, pp. 149-160, 2023. DOI: 10.1007/s43236-022-00517-8.

[ACM Style]

Yanhui Qiu and Daolian Chen. 2023. Three‑mode one‑cycle controlled current‑source single‑stage multi‑input high‑frequency‑link inverter. Journal of Power Electronics, 23, 1, (2023), 149-160. DOI: 10.1007/s43236-022-00517-8.