Title :
Overload prevention
Author :
Cheng, Po-Tai ; Hou, Chung-Chuan ; Huang, Yung-Fu
Author_Institution :
Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
This work presents a series active filter system for three-phase, four-wire distribution systems to alleviate the overloading of the neutral conductor. The active filter system employs a voltage sources inverter connected in series with a neutral conductor to suppress the excessive current harmonics. Theoretical analysis shows that series active filter system are more suitable than shunt active filter systems because most of the nonlinear load at low voltage levels are categorized as harmonic voltage source type. Laboratory test results show that the proposed system achieves desired filtering function.
Keywords :
active filters; conductors (electric); distribution networks; invertors; power conversion harmonics; power harmonic filters; harmonic current suppression; harmonic voltage source; low voltage levels; neutral conductor; nonlinear load; overload prevention; series active filter system; shunt active filter systems; three-phase-four-wire distribution systems; voltage source inverter;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/MIA.2004.1353044