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The Pohang Accelerator Laboratory (PAL) had started the 10 GeV PAL-XFEL project from 2011. The PAL-XFEL needs a highly stable electron beam. The very stable beam voltage of a klystron- modulator is essential to provide the stable acceleration field for an electron beam. Thus, the modulator system for the XFEL requires less than 50 ppm PFN voltage stability. To get this high stability on the modulator...
This paper proposes a high-performance line-interactive DVR which can compensate the voltage interruption within 2 ms. The operational feasibility was verified through computer simulations and experimental works with a 3 kVA prototype. The developed system can compensate the input voltage sag and interruption within 2 ms, in which the maximum allowable duration of voltage interruption is 2 seconds...
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