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http://dx.doi.org/10.6113/TKPE.2018.23.6.440

Novel Control and Design Method for Wide Stability Range of Grid Connected Inverter with LCL Filter  

Park, Kwon-Sik (Dept. of Electrical Eng., Pukyong National University)
Seo, Byung-Jun (Dept. of Electrical Eng., Pukyong National University)
Kim, Hak-Soo (Dept. of Electrical Eng., Pukyong National University)
Nho, Eui-Cheol (Dept. of Electrical Eng., Pukyong National University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.23, no.6, 2018 , pp. 440-445 More about this Journal
Abstract
This study proposes a novel control and design method for a grid-connected inverter with an LCL filter without damping. The current resonance phenomenon must be considered when designing the grid-connected inverter system with an LCL filter. Passive or active damping is used in the inverter system to reduce the resonant current. However, passive damping reduces the efficiency of the system, and active damping methods are complex. If the resonant frequency is in a specific region, then the system will be unstable. This study examines the process of stabilizing the entire region without resonant damping. The validity of the proposed method is verified through simulation and experimentation.
Keywords
Grid-connected inverter; LCL filter; Active damping; Passive damping;
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