An Inrush Current Limiting Method for Grid-Connected Converters Considering Grid Voltage Disturbances

Li, Haiguo; Gao, Zihan; Ji, Shiqi; Ma, Yiwei; Wang, Fei

doi:10.1109/jestpe.2022.3147515

Title: An Inrush Current Limiting Method for Grid-Connected Converters Considering Grid Voltage Disturbances

Journal Article · 28 January 2022 · IEEE Journal of Emerging and Selected Topics in Power Electronics

DOI: https://doi.org/10.1109/jestpe.2022.3147515 · OSTI ID:1974594

^[1];

^[2]; Ji, Shiqi ^[3];

^[4]; Wang, Fei ^[5]

University of Tennessee, Knoxville, TN (United States); University of Tennessee
University of Tennessee, Knoxville, TN (United States)
University of Tennessee, Knoxville, TN (United States); Tsinghua University, Beijing (China)
University of Tennessee, Knoxville, TN (United States); Electric Power Research Institute, Knoxville, TN (United States)
University of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

To support the electric power grid, some grid-connected converters are required to ride through abnormal grid conditions, including voltage disturbances. However, at the moment, when a grid voltage disturbance happens, a large inrush current could be induced due to the large difference between the grid and converter output pulsewidth modulation (PWM) voltages. This inrush current could be more severe in the faster switching SiC-based multilevel converter, which only needs a small filter inductance to meet its normal operation requirements, such as harmonics and peak ripple currents. In this article, a PWM mask method is used to limit the inrush current. With this method, the inrush current can be effectively limited to a preset value and can help the converter ride through grid voltage disturbances. Furthermore, the method is validated through experiments conducted on a single-phase SiC-based five-level converter considering low voltage, high voltage, and phase angle disturbances.

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Research Organization:: University of Tennessee, Knoxville, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0008410

OSTI ID:: 1974594

Journal Information:: IEEE Journal of Emerging and Selected Topics in Power Electronics, Journal Name: IEEE Journal of Emerging and Selected Topics in Power Electronics Journal Issue: 2 Vol. 10; ISSN 2168-6777

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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