双回线路距离Ⅲ段保护与线路过载切负荷装置配合关系探讨

Discussion on Cooperation Between Double Loop Distance Ⅲ and Overloading Line Shedding Device

双回线高负载率情况下线路保护、过载切负荷装置的整定及两者之间配合不当,可能造成双回线相继跳闸,导致变电站失压、大量负荷损失。详细阐述了两者的整定原则、存在的问题,并结合现场实际试验的结果,说明在实际中如何合理运用,并不断提高供电的可靠性和对用户供电的连续性。

Double loop successive tripping, substation in loss of voltage and load may be resulted from the improper setting of line protection ＆ overload shedding device. Combined with the actual test results and detailed analysis,the setting principles and exited problems are described,and the application is demonstrated for the purpose of improving the reliability and continuity of power supply.