A parallel-connected thyristor converter, having improved power factor and smoother output voltage waveforms, is presented. This is achieved by the use of interphase reactors with several taps changed by thyristors and two sets of asymmetrical controlled thyristor converters. To minimize the reactive power, a special asymmetrical triggering method is used. A method for finding the maximum power-factor switching mode is established. The triggering methods and experimental results are described.
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