Wind Farm Tie-line Protection Setting Based on Adaptive Current-Voltage Protection Principles

Wind farm tie-lines need to complete the relay protection, but existing tie-lines, or not set protect at wind farm side, or the protection may be affected by wind farm characteristic and misoperation. This paper first analyzes the DFIG short circuit current characteristics; draw DFIG short circuit current be closely connected with fault time, fault modes, the Crowbar circuit whether action, voltage dips degree, etc. So setting the tie-line protection based on adaptive current-voltage protection principles. Finally, paper establishes the simulation model that base on Northern Shaanxi Lang'ergou wind farm to test the protection, the simulation software is DIgSILENT. Test results show that the protection configuration scheme is feasible; it can distinguish the internal fault or external fault and with excellent properties.