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.