An Improved Control for Grid-Following Inverter with Active Damping and Capacitor Voltage Decoupling

A. W. dos Santos Serra, L. A. S. Ribeiro, M. Savaghebi

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Abstract

In this paper a current control strategy is proposed for grid-following inverters that are connected to the grid through LCL filters. A lead compensation is utilized in series with the proportional gain of the current controller so that high bandwidth is achieved. Furthermore, capacitor current feedback active damping is used to mitigate the effect of the LCL filter resonance frequency. In addition to the improvements mentioned before, capacitor voltage decoupling is also used to enhance the disturbance rejection capability of the inverter. The proposed strategy is validated through theoretical analysis and experimental results obtained in a testbench.
Original languageEnglish
Title of host publicationProceedings of 2024 IEEE Energy Conversion Conference and Expo
Number of pages7
PublisherIEEE
Publication statusAccepted/In press - 2025
Event2024 IEEE Energy Conversion Conference and Expo - Phoenix, United States
Duration: 20 Oct 202424 Oct 2024

Conference

Conference2024 IEEE Energy Conversion Conference and Expo
Country/TerritoryUnited States
CityPhoenix
Period20/10/202424/10/2024

Keywords

  • Grid-following inverter
  • LCL filter
  • Current controller
  • Active damping

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