Title :
Operations of the dominant harmonic active filter (DHAF) under realistic utility conditions
Author :
Cheng, Po-Tai ; Bhattacharya, Subhashish ; Divan, Deepak
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
This paper presents laboratory test results of the dominant harmonic active filter (DHAF) prototype. The DHAF system achieves harmonic isolation at the dominant harmonics using square-wave active filter inverters. The key advantages of the DHAF system are the low rating and low bandwidth requirements of the active filter inverter. Such characteristics allow cost-effective and viable applications of the DHAF system to mitigate harmonic problems for high-power nonlinear loads (10-100 MW and above). Several practical situations, including source-sink resonance, ambient harmonic interferences, and unbalanced grid voltages are applied to the DHAF prototype to validate its performance. The operation principles of the DHAF system and the synchronous-reference-frame-based controller are discussed to explain how harmonic isolation at the dominant harmonics is accomplished. A design example of the DHAF system for a 20 MVA rectifier load at an industrial site is also given to illustrate its application
Keywords :
active filters; invertors; power harmonic filters; 20 MVA; HVDC; ambient harmonic interference; dominant harmonic active filter operation; dominant harmonics; harmonic isolation; harmonic problems mitigation; high-power nonlinear loads; industrial site; low bandwidth requirements; operation principles; realistic utility conditions; rectifier load; source-sink resonance; square-wave active filter inverters; synchronous-reference-frame-based controller; unbalanced grid voltages; Active filters; Bandwidth; Interference; Inverters; Laboratories; Power harmonic filters; Prototypes; Resonance; Testing; Voltage;
Journal_Title :
Industry Applications, IEEE Transactions on