In order to improve the numerical calculation speed of electromagnetic transient of power system, differential quadrature method is applied to electromagnetic transient simulation, and according to the V transformation characteristics of weighted coefficient matrix in differential quadrature method, a fast electromagnetic transient calculation method based on differential quadrature method is proposed. In this paper, the matrix with increased dimension due to the introduction of interior points is partitioned to avoid the direct inverse of the matrix with increased dimension. By using the characteristics of block matrix, the inverse calculation of large-scale matrix is transformed into simple pre-generation operation and the inverse calculation of small-scale matrix, thus improving the efficiency of electromagnetic transient calculation based on differential quadrature method. Numerical examples show that the effective acceleration ratio can be obtained for linear time-varying or nonlinear power systems..
