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A Study on the Utilization and Control Method of Hybrid Switching Tap Based Automatic Voltage Regulator on Smart Grid
Journal of The Korea Society of Computer and Information
Abbr :
JKSCI
2012, 17(12), pp.31-39
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science
2012, 17(12), pp.31-39
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science
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In this paper, we propose a microprocessor-based automatic voltage regulator(AVR) to reduce consumers’ electric energy consumption and to help controlling peak demanding power. Hybrid Switching Automatic Voltage Regulator (HS-AVR) consist of a toroidal core, several tap control switches, display and command control parts. The coil forms an autotransformer which has a serial main winding and four parallel auxiliary windings. It controls the output voltage by changing the combination of the coils and the switches. Relays are adopted as the link switches of the coils to minimize the loss. To make connecting and disconnecting time accurate, relays of the circuit have parallel TRIACs. A software phase locked loop(PLL) has been used to synchronize the timings of the switches to the voltage waveform. The software PLL informs the input voltage zero-crossing and positive/negative peak timing. The traditional voltage transformers and AVRs have a disadvantage of having a large mandatory capacity to accommodate maximum inrush current to avoid the switch contact damage. But we propose a suitable AVR for every purpose in smart grid with reduced size and increased efficiency.
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