Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A New Gate Pulse Generating Method of 12-Pulse Phase Controlled Rectifier for HVDC

HVDC용 12-펄스 위상제어정류기의 새로운 게이트 펄스 발생 기법

  • Ahn, Jong-Bo (Korea Electrotechnology Research Institute, Electric Power Research Center, I & C Group) ;
  • Kim, Kook-Hun (Korea Electrotechnology Research Institute, Electric Power Research Center, I & C Group) ;
  • Lee, Jong-Moo (Korea Electrotechnology Research Institute, Electric Power Research Center, I & C Group) ;
  • Lee, Ki-Do (Korea Electrotechnology Research Institute, Electric Power Research Center, I & C Group)
  • 안종보 (한국전기연구소 전력연구단 계측제어연구그룹) ;
  • 김국헌 (한국전기연구소 전력연구단 계측제어연구그룹) ;
  • 이종무 (한국전기연구소 전력연구단 계측제어연구그룹) ;
  • 이기도 (한국전기연구소 전력연구단 계측제어연구그룹)
  • Published : 2000.11.25
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Abstract

High voltage direct current(HVDC) transmission system uses the phase controlled rectifier triggered by means of IPC(individual phase control) or EPC(equidistant pulse control). Most HVDC system has adopted EPC method that can solve the harmonic instability problem of IPC method in weak power system. But EPC has inherent indirect synchronizing problem requiring the closed loop control. This paper presents the new gate pulse generating method for 12-pulse HVDC converter, which combines IPC with EPC. Simulation and test results are presented. The basic concept is that it generates the gating pulse for 12-pulse converter by synthesizing the internal phase reference using the frequency and phase information of a sin91e phase voltage. To ensure the reliability of the external phase input, Potential transformer that detects the phase voltage has redundancy. Using fault detecting algorithm the healthy input is always guaranteed. And the frequency compensation function was reinforced.

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