电测与仪表2017，Vol.54Issue(24)：17-23,36,8.
换相失败后水轮发电机的频率响应特性分析
Frequency response characteristic analysis of hydraulic turbine after commutation failure
摘要
Abstract
Aiming at the stability problem of frequency and generator angle after commutation failure in HVDC system,this paper analyzed the mechanism of commutation failure in detail based on the commutation process.Considering the moderating effect of governor on mechanical power in transient process after faults,the power angle characteristics of the generator are divided into unstable mode and stable mode based on equal area rule.The two modes are relative to the commutation failure duration and DC capacity.The influence of water hammer time constant on system response after commutation failure is analyzed in stable mode.The mechanical power control of the governor and hydraulic turbine shows a negative regulation effect for the transfer function of hydraulic turbine is non-minimum phase system.The relative conclusions are verified by different BPA model simulations.关键词
高压直流输电/换相失败/水轮机/故障分析/机理分析Key words
HVDC/commutation failure/hydraulic turbine/fault analysis/mechanism analysis分类
信息技术与安全科学引用本文复制引用
李四勤,王峰,赵晓东,顾雨嘉,刘天琪..换相失败后水轮发电机的频率响应特性分析[J].电测与仪表,2017,54(24):17-23,36,8.基金项目
宁夏多直流送端电网机电-电磁混合在线仿真关键技术研究子课题(SGNXDK00BGJS1600021) （SGNXDK00BGJS1600021）
