基于高精度直接积分法的输电线路过电压电磁暂态快速计算

Fast Over-Voltage Electromagnetic Transient Calculation of Transmission Line Based on High Precision Direct Integration Method

过电压的数值计算是获得过电压波形和研究其特性的重要手段,为提高过电压计算的仿真效率,提出了一种基于高精度直接积分法的输电线路过电压快速仿真方法,构建了输电线路的分布参数模型,并结合一种插值方法,在空间上将电报方程离散为时域常微分方程组,可以采用大步长仿真,因而具有较高的计算效率,且相对于小步长的临界阻尼调整法,误差值控制在较小的区间内。通过与临界阻尼调整法的计算结果进行对比,验证了所提算法的有效性。

Numerical calculation for over-voltages is an important means of obtaining overvoltage waveforms and studying their characteristics.A fast simulation method for over-voltages of transmission line based on high precision direct integration method is proposed to improve the simulation efficiency of over-voltage.The distributed parameter model of the transmission line is constructed,and an interpolation method is used to spatially discretize the telegraph equation into a set of time-domain ordinary differential equations.The method can be simulated with large step size,and thus has high computational efficiency,and the error value of the critical damping adjustment method with respect to the small step is controlled within a small interval.The effectiveness of the algorithm is verified by comparison with the calculation results of the critical damping adjustment method.