Untitled Document
Untitled Document
> Archives > Current Issues
JEET, Vol. 13, No. 1, January 2018
Sensorless Active Damping Method for an LCL Filter in Grid-Connected Parallel Inverters for Battery Energy Storage Systems
Byoung Kuk Lee
Area B - Electric Machinery and Power Electronics
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.
Keyword Active damping,Grid-connected inverter,LCL-filter,Parallel-connected inverter,Energy storage system
Untitled Document