COMBINED ANTI-RESONANT FILTERS IN CAPACITOR BATTERIES FOR REACTIVE POWER COMPENSATION

• Main Author: KOSTIC, MILOJE
• Format: Patent
• Language: English; Serbian
• Published: 30.08.2013
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

Postupak Kombinovani antirezonantni filtri u kondenzatorskim baterijama za kompenzaciju reaklivne energije je naznačen time, da se, umesto filterskih sekcija kondenzatora sa jednakim reaktansama rednih filterskih prigušnica XL7%, sekcije (1), (2) i (3) dodaju i filterske sekcija kondenzatora sa različitim vrednostima reaktansi rednih filterskih prigušnica XL5.5%, sekcije (4), (5) i (6) , pri čemu snage 4. sekcije kondenzatora mora biti pažljivo odabrana, proračunata kako, po priključenju te sekcije sa reaktansom redne prigušnice XL5.5%, struja 5. harmonika ne bi premašila najviše dozvoljene vrednosti za navedeni kondenzator i prigušnicu. Invention herewith described refers to the combined anti-resonant filters in the capacitor batteries for reactive power compensation in electrical networks with higher harmonics consisting of two types of anti-resonant filters (section capacitor/choke), for example: - groups of parallel sections with fr = 189 Hz, i.e. with a serial choke reactance p = 7%, and - groups of parallel sections with fr = 213 Hz, i.e. with a serial choke reactance p = 5.5%. The reactance section of the capacitors with chokes p = 5.5%, for the fifth harmonic is two times smaller, and the absorption power of these filters and of the capacitor complete battery is increased. As a consequence, the currents of the fifth harmonic, which go into the network, are significantly reduced and, therefore, the harmonic voltage distortion becomes lower. So it is, in the considered case, reduced to a safe value of THD (U) 4% from the high initial value of THD (U) = 10.2%. This is the biggest advantage of the capacitor batteries consisting of the combined anti-resonant filters.