【摘要】 对两种极化电压下的横联差动电流方向保护的选择元件在同杆并架双回线故障下的动作行为进行了研究。通过理论分析和仿真验证,指出相比于采用无关相相间电压极化的选择元件,采用正序电压极化的选择元件还具有其功率方向继电器的测量角与故障点位置无关,也不随双侧电源的功角差δ变化而变化的特点,从而指出采用该种方法使得横差保护具有更好的动作性能。更多还原

【Abstract】 This paper analyses selectors of transverse differential current direction protection using two types polarizing voltage for double circuit lines on the same tower.By using academic analysis and simulational validation,it points out that comparing with the selectors using interlinked tension of irrespective phase as polarizing voltage,the selector using positive voltage as polarizing voltage has some more virtues.The metrical angle of the power direction relay is independent of the location of fault,and it does not change along with the change of power declinate δ of bilateral sources.Thereby,it shows that the later scheme has better performance.更多还原