In recent years, detailed modeling of power electronic Single-phase loads, composed with triac controlled ac devices and their behavior on different system conditions are a chopper, are frequently used power electronic loads in great concern of the power industries and customers. One of the industrial applications; such as glass melting [7, 8], controlling widely proliferated such devices is the triac controlled ac of ac motor speed [9, 10] and dimming lamps [11]. In general, choppers. Although these types of devices have important to achieve effective and proper operation, such applications application areas, their poor power factor performance is the come with a compensation problem to be solved in a cost main obstacle for the large scale implementation in power efficient manner. The studies, that are presented in [7, 8], systems. This paper presents an analysis on the behaviour of a demonstrate methods for power factor improvement with single phase load composed with triac controlled ac chopper ilters during reactive power compensation under nonsinusoidal proper fisn trlac controlled ac chopper circuits which are voltage.The results of these analysis shows that for high employed as the glass melter. It iS shown that significant conduction angle distortion on the source voltage improve the improvement in the power factor can be achieved by filtering power factor which is contradicting with the previous findings. In out of the specific harmonics [7, 8]. The energy efficiency of addition, it is observed that, performance of power factor triac controlled ac chopper circuits in the applications of ac compensation systems are heavily affected by source voltage motor speed control is the subject of the studies, which are harmonics phase angles which are ignored in existing literature.presented in references [9, 10]. In the studies, it is demonstrated that the efficiency of ac motors could be Keywords-Harmonics, ac chopper circuits, power factor, optimized by implementation of chopper circuits. The study reactive power conmensadon, nonsinusoidal condtion[11] experimentally analyses that phase-controlled dimmable electronic ballast for fluorescent lamps taking into account
