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中文摘要：
提出一种基于距离保护契合因子的区域后备保护方法,将各段距离保护的元件动作情况与故障位置的关系量化为距离保护贡献度,并将其作为权重构建保护契合度函数和保护契合度期望函数。将保护契合度函数与保护契合度期望函数之比定义为距离保护契合因子,从而识别故障线路。利用IEEE 10机39节点系统与贵州都匀实际系统进行仿真,仿真结果表明,所提算法不受信息非同步的影响,在距离保护动作50%的信息缺失或错误的情况下,仍能准确判断故障线路。
英文摘要：
An algorithm based on the fitting factor of distance protection is proposed for the regional backup protection,which quantitatively converts the relationship between the condition of its element action and the fault location into the contribution degree for every zones of each distance protection, takes the contribution degree as the weight to establish the protection fitness function and expected protection fitness function;defines the ratio of fitness function to expected fitness function as the fitting factor of distance protection;identifies the faulty line according to the fitting factor. Simulations are carried out for IEEE 10-generator 39-bus system and Duyun system in Guizhou,and the simulative results show that,immune to the asynchrony of information,the faulty line is still identified correctly bv the calculated fitting factor even when 50% of action information is lost or incorrect.
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