Konverter Ac-dc Tiga Fasa Terkendali Terhadap Total Harmonic Distortion (Thd) Pada Beban Induktif Berbasis Lab-view

Abstract

Application of non linear loads are widely used in household industries, office buildings and factories such as power converters for motor speed control of ac/dc, un-interruptible power supplies (ups) lampfluorescent using electronic ballas. Ac-dc converters use of electronics will draw distorted current containing harmonic components and will cause the overall system power factor is reduced. Distorted currents will contain thd% (total harmonic distortion). In the operation of ac-dc converter controlled three-phase, setting the ignition point is worth noting. Giving improper ignition angle can cause the ac-dc converters do not work optimally. In this study, presented a new method to measure the thd% automatically on the input side of the net ac-dc converter controlled three-phase as a function of ignition angle based on an inductive load labview 8.5 and ni-dq 6008. Laboratory experiments conducted by evaluating the value of thd% and looking for work operations ignition angle as a function of% thd on the input side of the net ac-dc converter is controlled to a three-phase inductive load using labview 8.5 software and hardware ni-dq 6008. Experimental results of the operation value of work ac-dc converter: the load l1 = 0.25 h. Value of 31% ≤ thd ≤ 35% and ≤ 52.2 (α0) ≤ 58.09, with a presentation error ≤ 0.2%. For thd 5%, while for thd%> 35% will get a% e> 4%. On load l2 = 0.56 h.nilai thd ≤ 31% ≤ 36% and (α0) = 54 with a percentage error ≤ 3% Keywords: ac-dc converter, thd. Lab vie