COMPARATIVE STUDIES INTO RESONANCE DAMPING OF OUTPUT LCL FILTER FOR ACTIVE POWER FILTER WITH VOLTAGE SOURCE INVERTER

Edmund Kwafo Adjei-Saforo

Kumasi Technical University

Misbawu Adam

Kumasi Technical University

Samuel Addo Darko

Kumasi Technical University

Nchor Akansake

Kwame Nkrumah University of Science and Technology

Keywords: Resonance, Passive damping, Active power filter, LCL filter


Abstract

The active power filters are members of harmonic filtering family which is made up of embedded power electronic devices and it is used for enhancing power quality. However, while addressing harmonic distortion, an overcompensation stemming from step response might occur, leading an extended settling time, thus, driving the system into oscillation. Not all but also, the challenges associated with the control of output LCL filter of APF connected inverter originates from the resonance problem. Therefore, this paper analyses passive damping solutions to suppress the resonance problems of an LCL filter. Six passive damping remedies were considered, according to the location of the damping term. A capacitor with a series resistor, which is widely used is proposed among the six passive damping techniques. The simulations are carried-out using MATLAB/Simulink. The results, compared to others, depict the lowest total harmonic distortion (THD) as well as power loss at the fundamental frequency.


Author Biographies

Edmund Kwafo Adjei-Saforo, Kumasi Technical University

Faculty of Engineering and Technology

Misbawu Adam, Kumasi Technical University

Faculty of Engineering and Technology

Samuel Addo Darko, Kumasi Technical University

Faculty of Engineering and Technology

Nchor Akansake, Kwame Nkrumah University of Science and Technology

Faculty of Physical Sciences Computational Sciences