| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technology that enables a reactive power and a harmonic current to be compensated cost effectively. <P>SOLUTION: An LC circuit 20 has a series resonance circuit, in which capacitors 21u, 21v, 22w (or 22u, 22v, 22w) are connected to reactors 23u, 23v, 23w in series. A series circuit of the series resonance circuit of the LC circuit 20 and secondary windings 31u2, 31v2, 31w2 of a transformer 30 is connected to power lines 3u, 3v, 3w. A control device 50 controls a semiconductor power conversion device 60 to supply primary currents Itu, Itv, Itw for compensation to the primary windings 31u, 31v, 31w of the transformer 30. Thereby, secondary voltages VT (VTu, VTv, VTw) for compensation are outputted from the secondary windings 31u2, 31v2, 31w2 of a transformer 30, and compensation currents IAF (IAFu, IAFv, IAFw), which compensate the reactive currents and harmonic currents, are supplied to the power lines 3u, 3v, 3w. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
