The RTDS experiment is carried out for the relay protections of outgoing power grid of largescale grid-connected wind farm and its existing problems are pointed out.The corresponding suggestions about the relay configuration are proposed:the main protection of 110 kV outgoing transmission line should adopt the phase-split current differential protection while its backup protection adopt the distance section Ⅰ using differential equation algorithm,or the time setting of phasor-based distance section Ⅰ be prolonged by 0.15 s while the conventional distance section Ⅱ,distance section Ⅲ and zero-sequence current protection be equipped;the main protection of outgoing transformer should adopt the differential protection with the inrush current criterion using the dead angle identification,time-difference method,etc.while its backup protection adopt the compound over-current protection and zero-sequence current direction protection;the main protection of 330 kV outgoing transmission line should adopt two independent sets of phase-split current differential protection with the voltage sudden-change phase selector and zero-sequence directional component while its backup protection adopt the same configuration as that of 110 kV outgoing transmission line.%开展大规模风电场并网送出电网继电保护实时数字仿真(RTDS)试验,指出现有风电场送出电网继电保护存在的问题,给出风电场送出电网保护配置建议:110 kV送出线路的主保护采用分相电流差动保护,后备保护采用解微分方程算法的距离Ⅰ段,或将相量距离Ⅰ段保护延时0.15s动作,同时配置常规距离Ⅱ、Ⅲ段及零序电流保护;送出变压器主保护采用差动保护,励磁涌流判据采用间断角鉴别、时差法等方法,后备保护配置复合过电流保护及零序电流方向保护;330 kV送出线路主保护配置2套独立工作的分相电流差动保护,采用电压突变量选相元件及基于零序分量的方向元件,后备保护配置与110 kV送出线路相同.
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