US 6,982,546 B2
Hybrid reactive power compensation device
Chin-Chang Wu, Kaohsiung (Taiwan); Hurng-Liang Chou, Kaohsiung (Taiwan); Wen-Pin Hsu, Kaohsiung (Taiwan); and Yao-Jen Chang, Kaohsiung (Taiwan)
Assigned to UIS Abler Electronics Co., Ltd., Taipei Hsien (Taiwan)
Filed on Aug. 25, 2003, as Appl. No. 10/646,755.
Claims priority of application No. 91133221 A (TW), filed on Nov. 08, 2002.
Prior Publication US 2004/0090212 A1, May 13, 2004
This patent is subject to a terminal disclaimer.
Int. Cl. G05F 1/70 (2006.01)
U.S. Cl. 323—205 8 Claims
OG exemplary drawing
 
1. A hybrid reactive power compensation device parallel-connected to a power system to provide reactive power to thereby improve the power factor, comprising:
a passive type reactive power compensator; and
an active type reactive power compensator serially connected to the passive type reactive power compensator;
wherein the passive type reactive power compensator provides the reactive power so that power capacity of the active type reactive power compensator is reduced; the active type reactive power compensator of the hybrid reactive power compensation device can supply a linearly adjustable reactive power within a predetermined range; the active type reactive power compensator is adapted to provide a current with a nearly sinusoidal waveform for reactive power compensation, thereby avoiding destruction of the passive type reactive power compensator caused by a power resonance.