Premium
Active filter system containing an inverter bypass circuit to suppress harmonic resonance
Author(s) -
Ogihara Yoshiya,
Matsukawa Mitsuru,
Tada Satoshi,
Ikeda Haruo,
Kawaguchi Ikuo,
Shiraishi Hiroshi
Publication year - 1994
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391140610
Subject(s) - active filter , harmonics , transformer , inverter , control theory (sociology) , harmonic , engineering , lc circuit , electronic filter , electronic engineering , capacitor , electrical engineering , voltage , computer science , physics , acoustics , control (management) , artificial intelligence
The superconducting‐type magnetically levitated railway system (MAGLEV), which is driven directly by variable voltage, variable frequency (VVVF) inverters or cycloconverters, is well known as the new traction system for future super‐rapid mass transportation. Since the frequency converters generate harmonic currents possibly leading to interference problem on utility transmission systems, the conventional ac filter of LC (reactor‐capacitor) branch and/or the active filter is necessary to prevent the harmonic disturbances. The authors have developed a novel harmonic compensation system consisting of shunt LC filters on load side, a step‐down transformer on receiving end, and a small‐capacity active filter with one end connected to the secondary winding of the transformer and the other to the load bus. The active filter is current‐controlled to give adequate damping to the harmonic resonance condition between the power system and the passive filter equipment, especially at lower harmonic frequencies. The principle and the characteristics of the new harmonic compensation system are described, and its laboratory test results which show satisfactory performance are given.