HARMONICS ANALYZER IN LABVIEW.

Anton, Florin Daniel; Iatan, Alexandru Mircea

Nowadays, power electronics are widely used for supplying loads with amplitude and frequency controlled voltage. These systems comprise mainly rectifiers and inverters which, as non-linear loads, produce currents with high harmonic content. Depending on the nature of these loads, the distortion created can be very high and affect the voltage supplied by the distribution network. In this case, it is highly possible that other loads served from the same network will be affected. To avoid such problems filters must be installed in order to eliminate the harmonics. The filters must be active, using auto configuration, because the devices are dynamically connected and the harmonics are changing accordingly. The active power filter allows compensating harmonic currents, reactive power, unbalanced loads, and zero-sequence currents, presenting a good dynamic and steady-state performance. The paper presents a method based on LabVIEW signal processing tools used in the study, development, and performance evaluation of the active power filter controller.

ELECTRICAL harmonics; VARIABLE speed drives; SIGNAL processing; POWER electronics; ELECTRIC current rectifiers; ACOUSTIC filters

Mathematical Modeling in Civil Engineering, 2011, Issue 4, p7

2066-6926

Academic Journal