Sustainable Energy Grids & Networks ( IF 5.4 ) Pub Date : 2021-07-26 , DOI: 10.1016/j.segan.2021.100522 Manoj Kumar Senapati 1 , Saumendra Sarangi 2
Three-phase fault and load encroachment are balanced phenomena. A load encroachment function is incorporated in distance relay to improve the security of protection scheme, confuses with three-phase fault during high reactive loading condition. Zone 3 malfunction during such a situation often causes cascade line tripping leading to wide-area disturbance. In this work, voltage phasors of selected buses from a wide area measurement system (WAMS) are used to prevent zone 3 maloperation of a distance relaying scheme during load encroachment. The change in magnitude and phase of bus voltages are applied to discriminate three-phase fault from load encroachment. Performance of the proposed method is tested with New England 39 bus and IEEE 118 bus system simulated in EMTDC/PSCAD. Results show high accuracy as well as the speed of operation, is very fast of the proposed method.
中文翻译:
使用同步相量数据在负载侵入期间保护 3 区
三相故障和负载侵占是平衡现象。距离继电器内置负载侵占功能,提高保护方案的安全性,在高无功负载情况下与三相故障混淆。在这种情况下,3 区故障通常会导致级联线路跳闸,从而导致广域干扰。在这项工作中,来自广域测量系统 (WAMS) 的选定总线的电压相量用于防止负载侵入期间距离中继方案的区域 3 误操作。应用母线电压幅值和相位的变化来区分三相故障和负载侵蚀。在 EMTDC/PSCAD 中模拟的新英格兰 39 总线和 IEEE 118 总线系统测试了所提出方法的性能。结果显示高精度以及操作速度,