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VARIABLE VOLTAGE BOOSTING AND BUCKING USING THYRISTOR CONTROLLED TRANSFORMERS
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| Author(s) |
A. S. Abdel-Karim; A. I. Taalab; A. E. Lashine |
| Abstract |
In this paper, two interconnected transformers are thyristor controlled to obtain variable voltage boosting and bucking for load voltage regulation. Thyristor switches are used with secondary coils which can be designed to suit the available thyristor ratings. The device action is based on flux control in the two transformer cores. The proposed approach gives very fast response with no distortion or phase shift in the voltage waveform, which, in its overall action, is equivalent to the procedure of on-load tap-changing. Thyristor switches are naturally commutated and the device is rated for only the range of variation required. Firing control and commutation process of the thyristor switches are considered. The proposed circuit arrangement is analysed considering the action of flux control and mathematical expression relating the circuit voltages and currents. The device performance is computed and theoretical results are compared with these obtained experimentally using a single-phase prototype. |
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| Filename: | Unnamed file |
| Filesize: | 3.514 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-02-03 by System |
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