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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 864989, 6 pages
Research Article

Control System Design of Shunt Active Power Filter Based on Active Disturbance Rejection and Repetitive Control Techniques

1College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
3Department of Renewable Energy and Distribution Network Technology, Jiangsu Electric Power Company Research Institute, Nanjing 211103, China

Received 13 December 2013; Accepted 18 February 2014; Published 23 March 2014

Academic Editor: Xiaojie Su

Copyright © 2014 Le Ge et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To rely on joint active disturbance rejection control (ADRC) and repetitive control (RC), in this paper, a compound control law for active power filter (APF) current control system is proposed. According to the theory of ADRC, the uncertainties in the model and from the circumstance outside are considered as the unknown disturbance to the system. The extended state observer can evaluate the unknown disturbance. Next, RC is introduced into current loop to improve the steady characteristics. The ADRC is used to get a good dynamic performance, and RC is used to get a good static performance. A good simulation result is got through choosing and changing the parameters, and the feasibility, adaptability, and robustness of the control are testified by this result.