AC-Side Transient Overvoltage in ±800 kV Ximeng-Taizhou UHVDC Transmission Project

doi:10.3969/j.issn.1000-7229.2015.09.009

Abstract

Abstract:

The AC-side transient overvoltage level of converter station directly affects the insulation coordination and operation safety of the equipments in converter station. The mechanism and influence factors of the AC-side transient overvoltage of converter station were analyzed. The EMTDC electromagnetic transient simulation model was established based on Ximeng-Taizhou ± 800 kV UHVDC transmission project, and the AC-side transient overvoltage level of converter stations in transmitter/receiver system of this project were calculated. The results show that the switching impulse protective level can be set to 761 kV if the 500 kV AC bus in transmitter/receiver system uses the arrester with 396 kV rated voltage； the switching impulse protective level can be set to 858 kV if the rated voltage of arrester is 420 kV； and the switching impulse protective level can be set to 1460 kV if the 1 000 kV AC bus in receiver system uses the arrester with 828 kV rated voltage. The calculation results can provide technical reference for subsequent research and construction.

Key words: UHVDC transmission, transient overvoltage, arrester

CLC Number:

TM 864

LI Gaowang, LI Yanan, ZOU Xin. AC-Side Transient Overvoltage in ±800 kV Ximeng-Taizhou UHVDC Transmission Project[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(9): 57-61.

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