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电网技术  2015 

基于权重数值积分的电力电子开关仿真插值算法

DOI: 10.13335/j.1000-3673.pst.2015.01.023, PP. 150-155

Keywords: 电磁暂态,权重数值积分,重新初始化,重新同步化,多重开关

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Abstract:

随着电力电子技术在电力系统中的广泛应用,电力电子开关引起的高频次系统拓扑突变对电磁暂态仿真提出了新挑战,为此,提出了一种电力电子开关仿真插值算法。在全局隐式梯形积分法条件下,该算法在开关动作点通过线性插值计算系统变量,并利用后向欧拉法对系统进行重新初始化,而后根据插值点在当步仿真步长的位置,利用权重法数值积分,灵活改变积分步长,快速积分至仿真整步时间点,对仿真进行再同步。在开关动作过程中,算法仅通过一次插值对仿真进行重新初始化,并在再同步过程中保持节点导纳矩阵不变,且能有效抑制数值振荡。算法在保证精度的前提下,降低了计算负担,提高了计算速度,并考虑了多重开关问题。最后通过算例验证了算法的适应性和有效性。

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