DOI QR코드

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단상 인버터 시스템에서 영 전압 근처 전압 강하 검출 기법에 관한 연구

The Study on Sag Detecting Scheme around Zero Crossing Voltage for Single-Phase Inverter System

  • 이우철 (한경대학교 전기전자제어공학과 IT 융합연구소)
  • Lee, Woo-Cheol (Hankyong National University Dept. of Electrical Electronic & Control Engineering, Institute for information technology convergence)
  • 투고 : 2013.11.11
  • 심사 : 2013.11.29
  • 발행 : 2014.01.31

초록

The all pass filter generates a virtual q-axis voltage component with $90^{\circ}$ phase delay but the virtual q-axis voltage cannot detect the voltage depending on the phase of the grid voltage. To overcome the problem, q-axis voltage component is generated from difference between the current and previous value of d-axis voltage component in the stationary reference frame. However, the difference voltage between the current and previous value around the zero crossing voltage is not enough to detect the voltage sag. Therefore, the new detection scheme which can detect the sag around the zero crossing voltage is proposed.

키워드

참고문헌

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