Abstract—Active front-end converter draws a special attention in drives application and distributed generation application where good power quality and robustness are essential. Damping is an essential part of design in LCL filter based grid-connected system from point of view closed loop stability. This paper presents a novel concept of state-space based hybrid-damping technique, which is an appropriate combination of passive and active damping, in order to make grid-interconnection reliable and robust which can ensure adequate stability margin in all possible grid interactive conditions.

Index Terms—Active front end converter (AFEC); hybrid damping; state-space based analysis; LCL filter.

N. Mukherjee was with Power Electronics Group in Indian Institute of Science, Bangalore and is now with the Power Engineering and Power Electronics Group in Aston University, Birmingham, UK (e-mail: mukhern2@aston.ac.uk).
V. John is with Indian Institute of Science (IISc), Bangalore, India (e-mail: vjohn@ee.iisc.ernet.in).

Cite: Nilanjan Mukherjee and Vinod John, "Hybrid Damping in Higher Order Line Side Filter in Active Front-end Operation," International Journal of Computer and Electrical Engineering vol. 4, no. 2, pp. 218-222, 2012.