| 摘要 |
<p>The present invention relates to an active zero-phase harmonic filter having an overload protection function using a contactless switching element, wherein the active zero-phase harmonic filter controls zero-phase harmonics introduced into the zero-phase harmonic filter to maximally prevent overload from occurring, thereby increasing safety while efficiently performing a zero-phase harmonic attenuation function, and more specifically, to a zero-phase harmonic filter which attenuates excessive zero-phase harmonics generated by a neutral line of a three-phase four-wire distribution system.</p> |
