【摘要】 基于"场-路"等效的思想,将冲击电压下±500kV直流线路分压器等效成电路模型,应用有限元-解析结合解法求取等效电路中的杂散电容及电感,然后用Milne法分析等效电路,从而获得了冲击电压下沿分压器高度方向上的瞬态电压分布。在数值模拟与实测结果相吻合的基础上,进一步分析并讨论了采用并联集总电容改善电压分布不均匀性时并联集总电容的选取,最后给出了一种较为理想的补偿方案。更多还原

【Abstract】 Based on the field-circuit equivalence concept, a ±500kV DC power transmission line divider subjected to an impulse voltage is treated as an equivalent circuit, in which the parameters of the mutual capacitance and the mutual inductance are obtained by using the hybrid finite element-analytical approach. The Milne method is used to solve the equivalent circuit, and so the transient voltage distribution along the height direction of the divider is obtained. On the agreement between the computed and the measured results of the voltage distribution of the divider, the selection of shunt-wound lumped capacitance for improving voltage distribution uniformity has been studied, and an appropriate selection is suggested.更多还原