Analysis and Performance of a High-Efficiency Transformerless Hybrid Active Filter

作者：Parkatti Perttu^*; Tuusa Heikki; Saren Hannu; Kuusela Kosti; Bjorkman Michael

来源：International Review of Electrical Engineering, 2011, 6(2): 537-546.

• Active Filters
• Harmonic Distortion
• Power Quality
• Power Conditioning

Active harmonic filters have been widely studied in recent years. Price, size and power losses have been the main problems with conventional active filters. This paper proposes a 3-phase voltage source active filter with series-connected capacitors and an La-type line filter (LCLC-VSAF). The system makes it possible to compensate harmonics with a lower dc-link voltage, higher switching frequency, and smaller filter inductors. Moreover, the active filter can be built using a fairly inexpensive standard frequency converter with a lower power rating. Experimental test results will be presented. Harmonics caused by 20 kW nonlinear loads were compensated in the 690 V power system. An active filter built on a commercial 400 V frequency converter with 20 kHz switching frequency was used. Efficiency up to 99% was achieved.

• 出版日期2011-4