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High-precision detection of three-phase voltage zero-crossing point based on FPGA

  • 2013-07-01
  • 173.95KB
  • Points it Requires : 2

Abstract: High-voltage intelligent synchronous switch technology is a key technology to effectively suppress overvoltage and inrush current in power system operation and improve power quality. The key to achieving zero-crossing synchronization of high-voltage switches lies in the accurate detection of the zero-crossing point of the three-phase voltage. This paper studies the accurate detection method of the three-phase voltage zero-crossing, designs the required digital low-pass filter, implements it in the Altera device CYCLONE EP1C6, and verifies it with the embedded logic analyzer in Qlartus5.0. [Author Abstract]

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