Abstract—Use of nonlinear loads at high voltages has increased tremendously in industry. These non-linear loads distort power quality by generating harmonics. Conventional active filters have limitations in high power high voltage systems. Use of multilevel inverter in active filters effectively reduces harmonics in high voltage systems eliminating need of high cost and bulky transformer. This paper presents the state of art of different topologies of multilevel inverter (MLI) used for active power filters (APF), the different control techniques and advanced modulation methods. It is aimed to provide a broad perspective on the status of MLI based APF technology to researchers and application engineers dealing with power quality issues in high voltage systems.

Index Terms—Multilevel Inverter, Active Power Filters reference generation, modulation techniques.

Madhukar Waware ,Member, IACSIT,IEEE,Pramod Agarwal, Member, IEEE Madhukar Waware is pursuing Ph.D. program in Electrical Engineering Department , Indian Institute of Technology Roorkee-247667, India(email-mwaware@rediffmail.com).
Pramod Agarwal is a professor in Electrical engineering Department, Indian Institute of Technology Roorkee-247667, India(email-pramgfee@iitr.ernet.in).

Cite: Madhukar Waware and Pramod Agarwal, "A Review of Multilevel Inverter Based Active Power Filter," International Journal of Computer and Electrical Engineering vol. 3, no. 2, pp. 196-205, 2011.