• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2022, Vol. 43 ›› Issue (10): 48-57.doi: 10.12204/j.issn.1000-7229.2022.10.005

• Core Equipment of DC Power Grid•Hosted by Associate Professor SONG Qiang, Associate Professor YU Zhanqing and Associate Professor ZHAO Biao• • Previous Articles     Next Articles

Analyze of Transient Current Characteristics of Hybrid DC Circuit Breaker in 500 kV VSC-HVDC Grid

WEN Weibing1, WEI Zheng1(), LAI Jiaxiang2, SHI Yan1, YANG Yong1, WANG Jialong1   

  1. 1. State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China
    2. Ira A Fulton School of Engineering, Arizona State University, Tempe AZ 85282, USA
  • Received:2022-07-12 Online:2022-10-01 Published:2022-09-29
  • Contact: WEI Zheng E-mail:weizhengbj@163.com
  • Supported by:
    State Grid Corporation of China Research Program(5500-202256391A-2-0-ZN)


DC circuit breaker(DCCB)is an effective means to solve the problem of DC side fault clearing of VSC-HVDC grid, and hybrid DCCB is currently one of the most mature technical routes. The development speed of the DC side fault of VSC-HVDC grid is fast and its process is complex. The study of the transient current (TC) characteristics of hybrid DCCBs in this case has important reference value for the design and development of DCCBs. Considering the real control and protection logic of VSC-HVDC grid after short-circuit fault and the action sequence of AC breakers and DCCBs, this paper analyzes the time-varying characteristics of the paths of the TC of DCCBs, deduces the expression of each development stage of TC, proposes the typical waveform of TC stress of each branch of DCCB. It provides a basis for the selection and the parallel number design of IGBT devices in DCCB. At the same time. Aiming at the problems that the TC stress of the main branch of the DCCB is severe and there is no effective improvement method, a TC suppression method of DCCB based on damping resistors in converter station is proposed. The results of electro-magnetic transient simulation show that the proposed method can effectively suppress the TC of the main branch of DCCB after faults.

Key words: VSC-HVDC grid, hybrid DC circuit breaker, transient current, suppression method

CLC Number: