Modelling and basic properties of three-phase hybrid transformer with unsynchronized active load

This paper deals with three-phase power system with hybrid transformer (HT). The HT contains conventional transformer with electromagnetic coupling and PWM AC line chopper integrated with secondary windings with electric coupling. The HT is located between distribution system and Local Balancing Area (LBA) with small power local energy sources. After description of the three-phase power system with hybrid transformer (HT) and unsynchronized active load, the mathematical and circuit models of the AC source with HT is presented. These models are verified by means of the simulation and experimental test results obtained for HT of about 3 kV A.

[1]  Marian Pasko,et al.  Power Theories for Improved Power Quality , 2012 .

[2]  A. Felce,et al.  Voltage sag analysis and solution for an industrial plant with embedded induction motors , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[3]  Math Bollen,et al.  Analysis of voltage tolerance of AC adjustable-speed drives for three-phase balanced and unbalanced sags , 1999, 1999 IEEE Industrial and Commercial Power Systems Technical Conference (Cat. No.99CH36371).

[4]  M. Jarnut,et al.  Power quality conditioners with minimum number of current sensor requirement , 2008, 2008 International School on Nonsinusoidal Currents and Compensation.

[5]  Z. Fedyczak,et al.  Single-phase serial AC voltage controller based on bipolar PWM AC matrix-reactance chopper , 2005, 2005 European Conference on Power Electronics and Applications.

[6]  Prasad Enjeti,et al.  Next generation distribution transformer: to address power quality for critical loads , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[7]  Jovica V. Milanovic,et al.  Effects of load dynamics on power system damping , 1995 .

[8]  C. Grigg,et al.  Predicting and preventing problems associated with remote fault clearing voltage dips , 1989, Conference Record. Industrial and Commercial Power Systems Technical Conference.

[9]  Jovica V. Milanovic,et al.  Closure on “ Sensitivity of Personal Computers to Voltage Sags and Short Interruptions” , 2005 .

[10]  Jacek Kaniewski.  Practical Application of Series Active Compensators , 2012 .

[11]  Gyu-Ha Choe,et al.  Step-up/down AC voltage regulator using transformer with tap changer and PWM AC chopper , 1998, IEEE Trans. Ind. Electron..

[12]  J. Kaniewski,et al.  Modeling and Analysis of Three-Phase Hybrid Transformer Using Matrix Converter , 2007, 2007 Compatibility in Power Electronics.

[13]  Jacek Kaniewski.  Modeling and analysis of three-phase hybrid transformer using buck-boost MRC , 2011, 2011 7th International Conference-Workshop Compatibility and Power Electronics (CPE).

[14]  Jacek Kaniewski,et al.  Implementation of a three-phase hybrid transformer using a matrix chopper , 2009, 2009 13th European Conference on Power Electronics and Applications.

[15]  Emilio Gómez-Lázaro,et al.  Influence of voltage dips on industrial equipment: Analysis and assessment , 2012 .