Configuration and setting of relay protection for wind farm and its outgoing line

The relay protections of the wind farm and its outgoing line are set for the security of wind generators or the protected components. The protection zones might be unclear. Moreover, the selectivity and the sensitivity of the protections have not been examined systematically. Combined with wind power fault characteristics, the maximum fault current provided by wind generators is calculated. The configuration and setting of relay protection for wind farm and its outgoing line is proposed with the compromise between the security of wind generators and the reliability of the whole system. Furthermore, a typical wind farm in Jilin province is taken as an example to do the setting and sensitivity calculations. The relay settings of the wind generator, step-up transformer, collector line, bus, main transformer and outgoing line are discussed in detail. The overcurrent protection of collector line is set and the selectivity and sensitivity of the protection is analyzed as well.