智能变电站线路差动保护原理分析与方案设计

The Principle Analysis and Scheme Design on Line Differential Protection of Smart Substation

围绕智能变电站线路差动保护进行研究,对线路差动保护进行理论分析,选用合理的差动原理,设计了智能变电站总体的线路差动保护方案,以此实现在智能变电站发生故障后能够快速可靠地切除区内故障,并减弱了过渡电阻对差动保护动作特性的影响。

This paper mainly studies on the line differential protection of smart substation, and it is analyzed theoretically. The overall line differential protection scheme for the smart substation was designed by selecting reasonable differential principle. In this way, the fault area can be cut off quickly and reliably after fault occurs, and the influence of the transition resistance on differential protection action characteristics will be reduced.