BROADBAND PASSIVE HARMONIC FILTER REDUCED HARMONIC OF THREE-PHASE SIX-PULSE.

摘要

The present invention relates to a broadband passive harmonic filter for reducing harmonics that occur upon three-phase six-pulse rectification. In particular, the present invention relates to a one-body passive harmonic filter having a core-type reactor, in which a power correction winding, a load correction winding, a fifth-harmonic reactor, and a seventh-harmonic reactor are configured to share flux and a single core. When a load is operated, harmonics (voltage or current harmonics) and power factor may be enhanced, reducing reactive power and apparent power. When no load current flows, capacitor current may be automatically cut off by a load current monitoring controller so that the reactive current of the harmonic filter capacitor does not affect the power system, and when load current flows, it is automatically turned back. The filter comprises a reactor, a capacitor, a discharging resistor, a load current monitoring controller, and a current sensor. [Reference numerals] (8) Inconstant current monitoring controller; (AA) Three-phase AC source; (BB) Three-phase inverter