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Capacitor Current Feedback Active Damping with Generalized Integrator-Based Differentiator for LCL-type Inverters
- Authors
- Woo, Deokyong; Kim, Sungmin
- Issue Date
- Oct-2024
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Active damping; digital control; Generalized Integrator; grid-connected inverter; LCL filter; stability
- Citation
- 2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024 - Proceedings, pp 4527 - 4533
- Pages
- 7
- Indexed
- SCOPUS
- Journal Title
- 2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024 - Proceedings
- Start Page
- 4527
- End Page
- 4533
- Abstract
- Capacitor Current Feedback Active Damping (CCFAD) is widely adopted in the industry because it can effectively achieve resonant damping of LCL filters by simply adding a current sensor. However, due to digital control delays, conventional proportional CCFAD exhibits virtual negative resistance in frequency ranges higher than one-sixth of the sampling frequency (fs/6). This virtual negative resistance introduces open-loop Right-Half Plane (RHP) poles, making the inverter system easily unstable under varying grid inductance conditions. Therefore, the Virtual Positive Resistance Region (VPRR) must be extended to construct a robust inverter system. This paper proposes a simple and effective method for extending VPRR through capacitor current feedback with a Generalized Integrator (GI)-based differentiator. © 2024 IEEE.
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Related Researcher
- Kim, Sung min
- ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)