交流故障合闸时刻对换相失败的影响研究

作者：叶超; 李晓华; 谢毅思; 罗龙波

来源：中国,黑龙江省,绥化市,北林区.

• 交直流互联系统
• 交流系统故障
• 合闸时刻
• 换相失败现象

　　In the AC/DC interconneetion system, AC system failure is the main reason for the DC commutation failure.The change regularity of line voltage amplitude and line voltage phase which after Y-Y and Y-D1 transformer are analyzed, when three-phase fault and single phase occur on AC bus.Combined with the process of valve commutation, this paper pointed out that the fault closing moments, the commutation voltage amplitude and phase angle is the main factors impact on commutation failure.Using PSCAD/EMTDC, a DC system model with detailed of the control system is set up.And the three-phase fault, single-phase fault ,which occur on AC bus, is simulated in different fault close moment.And the relationship between failure closing moment and the commutation is given for the typical bipolar 12 Pulse DC system.

• 单位
  华南理工大学