西北电网 330 kV 尖樊线人工短路试验中接地距离保护适应性分析

The fault characteristics of renewable energy plants represented by wind power have a new impact on the additional impedance of traditional distance protection，leading to the reduction of protection performance. However，the existing research on the adaptability of distance protection lacks the analysis of the single-phase grounding cases. Therefore，based on the data of two artificial short circuit tests conducted by Northwest Branch of State Grid at Jian-Fan transmission line and the fault characteristics of wind farms under various control strategies，the additional impedance coefficient of grounding distance protection under single-phase grounding is analyzed，and then the protection adaptability is judged. It is found that the additional impedance coefficient of the grid side protection is small，and the fault current of power supply on both sides has little influence on the protection. However，the additional impedance coefficient of the wind farm side protection is large，and the fault current of the power supply on both sides has a great influence on the protection，leading to protection rejection.