To ensure reliable no-action of differential protection on external short-circuit fault, the increasing of unbalanced current should be taken into account in maximal unbalanced current calculation, which is caused by only restraining the ratio error of current transformer. 为保证差动保护区外短路故障时可靠不动作,在计算最大不平衡电流时应考虑仅限制电流互感器变比误差导致不平衡电流增大因素。
For solving the unbalanced loads, the concept of the virtual rigidity is introduced to take account of the tension stiffening effect. 求解释放荷载过狴中引入虚拟刚度概念,用以摸拟拉伸硬化效应。