Adaptive relaying algorithm for protection of distribution networks integrated with wind farms

GU Ming-hua1， ZHU Hai-peng1， CHENG Yi-fan2， JIN Li-jun2
（1. Jining Power Supply Company， Shandong Electric Power Corporation， Jining 272001， China；
2. School of Information Engineering， Tongji University， Shanghai 201804， China）

Abstract： The short-circuit current in distribution network can be changed by the connection of wind power plant. Aiming at the problems of detrimental effects on the distribution system of the wind farm，protections now used must be adjusted and changed to ensure correct fault clearing with right method，and maintain the safe and stable operation of the distribution system. Firstly，the wind farm cut-in and cut-off，wind different farm capacity，different integration points，and different fault types were studied. Secondly，a model system of distribution network with wind plant was built to get the fault features under various operating modes. In this foundation，an adaptive relaying algorithm was proposed. Finally，simulation on Matlab/Simulink was used to show the effectiveness of the proposed algorithm. The research results indicate that this algorithm has good accuracy and sensitivity，and can adjust relay setting real time.
Key words： adaptive； relaying algorithm； wind farm； distribution system； Matlab/Simulink