High-Efficiency Line Conditioners With Enhanced Performance for Operation With Non-Linear Loads

• Published in: IEEE transactions on industrial electronics (1982) 2012-01, Vol.59 (1), p.412-421
• Main Authors: Soeiro, T. B., Petry, C. A., Lopes, L. A. C., Perin, A. J.
• Format: Article
• Language: English
• Subjects: AC-AC converter; Conditioners; Conditioning; Converters; Dynamical systems; Feedback control; Inductance; line conditioners; Nonlinear dynamics; Nonlinearity; Oscillations; Pulse width modulation; Rectifiers; Resistance; Serials; Studies; Topology; Voltage control
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2011.2138670

This paper presents the analysis, design, and experimental performance verification of a serial type line conditioner. Since it processes only a fraction of the load power, the overall converter losses tend to be lower and the efficiency of the conditioner higher. Regarding the dynamic performance, the line inductance, which results in a positive zero in the transfer function of the plant, is taken into consideration when designing a voltage controller with higher bandwidth for faster response. In addition, a virtual resistance is included in the control of the system to damp oscillations often seen for operations at light load and with nonlinear load conditions. Experimental results obtained with a 10 kVA prototype of a serial line conditioner fed from the load side and the proposed feedback control scheme are presented to demonstrate the superior performance of the line conditioner.