Abstract
AbstractIn a low‐voltage distribution line in a three‐phase four‐wire system, the neutral conductor current is increased by a current consisting mainly of the third harmonic, which has no phase rotation if the balance of the load has been removed, when harmonic generation equipment is included in the load. The increase of this neutral conductor current increases the waveform distortion of the receiving end voltage, and various kinds of waveform interference occur. To reduce the neutral conductor current, insertion of an active filter for the third harmonic wave near the load has been proposed, and a protective effect against waveform interference has also been reported. In this paper, a method for drastically reducing the neutral conductor current by using LC resonance, which is simpler than an active filter, is proposed. © 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 171(4): 19–27, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20897
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