A quasi passive filter for power quality improvement

Harmonic related problems in the electric utility are on the rise due to the proliferation of nonlinear power electronic industrial and domestic loads, which are prerequisites for energy efficiency. Passive, active and hybrid filters are countermeasures against these problems. To overcome the limitations of these filters, a simple and cost effective quasi-passive filter (QPF) topology is proposed in this paper. It comprises of a parallel and series LC tank circuit. The circuit utilizes large value AC capacitor. DC capacitors and power semiconductor devices are used to realize this capacitor.

[1]  Prasad Enjeti,et al.  Analysis and design of a new active power filter to cancel neutral current harmonics in three phase four wire electric distribution systems , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[2]  Po-Tai Cheng,et al.  Hybrid solutions for improving passive filter performance in high power applications , 1997 .

[3]  W. M. Grady,et al.  Survey of active power line conditioning methodologies , 1990 .

[4]  Hirofumi Akagi,et al.  New trends in active filters for improving power quality , 1996, Proceedings of International Conference on Power Electronics, Drives and Energy Systems for Industrial Growth.

[5]  Po-Tai Cheng,et al.  Hybrid solutions for improving passive filter performance in high power applications , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[6]  Jong-Soo Kim,et al.  A shunt hybrid active filter with two passive filters in tandem , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[7]  Fang Zheng Peng,et al.  A Combined System of Shunt Passive and Series Active Filters , 1990 .

[8]  Hirofumi Akagi,et al.  A new power line conditioner for harmonic compensation in power systems , 1995 .