Dealing with a Breakdown of a Middle Impedance Bus Current Differential Relay 一例中阻抗母差保护故障处理及原因分析
This is the reason for low-frequency breakdown. The Loop-Tree basis function is adopted to overcome the problem, however, this would lead to bad spectral properties of impedance matrix and slow iteration speed. 而采用环树基函数能够克服低频崩溃,但其阻抗矩阵的谱特性非常差,造成矩阵方程的迭代收敛非常慢。