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http://dx.doi.org/10.5370/JEET.2018.13.1.280

Sensorless Active Damping Method for an LCL Filter in Grid-Connected Parallel Inverters for Battery Energy Storage Systems  

Sung, Won-Yong (Department of Electrical and Computer Engineering, Sungkyunkwan University)
Ahn, Hyo Min (Department of Electrical and Computer Engineering, Sungkyunkwan University)
Ahn, Jung-Hoon (Department of Electrical and Computer Engineering, Sungkyunkwan University)
Lee, Byoung Kuk (Department of Electrical and Computer Engineering, Sungkyunkwan University)
Publication Information
Journal of Electrical Engineering and Technology / v.13, no.1, 2018 , pp. 280-286 More about this Journal
Abstract
A sensorless active damping scheme for LCL filters in grid-connected parallel inverters for battery energy storage systems is proposed. This damping method is superior to the conventional notch filter and virtual damping methods with respect to robustness against the variation of the resonance of the filter and unnecessary additional current sensors. The theoretical analysis of the proposed damping method is explained in detail, along with the characteristic comparison to the conventional active damping methods. The performance verification of the proposed sensorless active damping method shows that its performance is comparable to that of the conventional virtual damping method, even without additional current sensors. Finally, simulation and experimental results are provided to examine the overall characteristics of the proposed method.
Keywords
Active damping; Grid-connected inverter; LCL-filter; Parallel-connected inverter; Energy storage system;
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Times Cited By KSCI : 1  (Citation Analysis)
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