Voltage Stability and Transient Fault Current Limitation of Voltage-Controlled MMCs with L-Filters

Yingbiao Li, Jianbo Guo, Xiongfei Wang, Heng Wu, Bing Zhao, Shanshan Wang, Guanglu Wu

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

This paper presents a design-oriented analysis on the voltage stability and the transient fault current limitation of voltage-controlled modular multilevel converter (MMC) with L-filters. First, a dual-loop voltage control based on the L-filter plant is systematically designed, where the upper limits of controller parameters for ensuring the small-signal stability are identified. Then, considering the transient fault current limitation during faults, the lower boundaries of the inner current controller parameters are derived. Within the region of allowed controller parameters, the optimization is further made to minimize the closed-loop output impedance of MMC, which enhances the robustness of MMC output voltage against the load current disturbance. Lastly, the time-domain simulations corroborate the theoretical analysis.
Original languageEnglish
Title of host publication2019 4th IEEE Workshop on the Electronic Grid, eGRID 2019
PublisherIEEE
Publication dateNov 2019
Article number9092721
ISBN (Print)978-1-7281-5705-4
ISBN (Electronic)9781728157047
DOIs
Publication statusPublished - Nov 2019
Event4th IEEE Workshop on the Electronic Grid, eGRID 2019 - Xiamen, China
Duration: 11 Nov 201914 Nov 2019

Conference

Conference4th IEEE Workshop on the Electronic Grid, eGRID 2019
CountryChina
CityXiamen
Period11/11/201914/11/2019

Keywords

  • Controller design
  • Fault current
  • Modular Multilevel Converter (MMC)
  • Voltage control

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    Li, Y., Guo, J., Wang, X., Wu, H., Zhao, B., Wang, S., & Wu, G. (2019). Voltage Stability and Transient Fault Current Limitation of Voltage-Controlled MMCs with L-Filters. In 2019 4th IEEE Workshop on the Electronic Grid, eGRID 2019 [9092721] IEEE. https://doi.org/10.1109/eGRID48402.2019.9092721