The system of balancing electromagnetic parameters at single-phase variable load

Authors: Sidorov S.A., Roginskaya L.E. Published: 03.09.2015
Published in issue: #4(103)/2015  
DOI: 10.18698/0236-3933-2015-4-96-105

Category: Informatics, Computer Engineering and Control | Chapter: Automation, Control of Technological Processes, and Industrial Control  
Keywords: inductive energy storage, direct sequence and reverse sequence of currents and voltages, voltage unbalance, current unbalance, balancing device, reactor

The article considers the way of eliminating a voltage unbalance in electrical networks. A review of means to address the current unbalance, which are widely used nowadays, is presented. Their advantages and disadvantages are described. It is proposed to use a balancing device with an inductive energy storage unit designed with due regard to controllable power exchange between the network and the reactor using a three-phase bridge converter. A diagram of the balancing device is constructed and the principles of its functioning are described. The authors develop a method of generating currents of direct and reverse sequences on the basis of the specified unbalanced load current with the package MATLAB. They also design the reactive power source on the basis of an inductive storage element allowing the reactive power unbalance to be introduced into the power system in order to compensate the reactive power of the reverse sequence. An effective balancing device is obtained using the bridge converter with an inductive storage element at the output.


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