Analysis on the dynamic performance characteristics of HVDC control and protections for the HVDC line faults

作者：Li, Aimin^*; Cai, Zexiang; Ren, Dayong; Li, Xiaohua

来源：Automation of Electric Power Systems, 2009, 33(11): 72-75+93.

• Control and protection
• Current fluctuations
• Differential protection
• Dynamic performance
• Hvdc line protections
• HVDC lines
• Traveling wave protection
• Under-voltage protections

The traveling wave protection and under-voltage protection which are initiated by the voltage derivative can not detect the high impedance fault, and the long operation time of differential protection required to avoid external faults makes it hard to be the back-up protection. Furthermore, the HVDC control system has a great influence on the performance of the DC line protection, especially at the low load level. The differential protection will fail to action due to the current fluctuation caused by the control system. Based on the actual HVDC line parameters and the EMTDC simulation platform, the current DC line protection and the influence of the control system is evaluated, in connection with the fault records and the simulation results. An improvement scheme is proposed.

• 出版日期2009-6-10
• 单位华南理工大学