基于权重数值积分的电力电子开关仿真插值算法

发布时间：2018-03-10 01:18

本文选题：电磁暂态　切入点：权重数值积分　出处：《电网技术》2015年01期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:With the wide application of power electronics technology in power system, the topology change of high frequency system caused by power electronic switch brings a new challenge to electromagnetic transient simulation. A power electronic switch simulation interpolation algorithm is proposed. Under the condition of global implicit trapezoidal integral method, the system variables are calculated by linear interpolation at the switching point, and the system is reinitialized by backward Euler method. Then, according to the position of interpolation points in the step size of the simulation, the integral step size is changed flexibly by using the weight method, and the simulation is resynchronized by fast integration to the simulation step. The algorithm only reinitializes the simulation by one interpolation, keeps the node admittance matrix unchanged in the process of resynchronization, and can effectively suppress numerical oscillations. The algorithm reduces the computational burden on the premise of ensuring accuracy. The computation speed is improved and the multiple switch problem is considered. Finally, the adaptability and effectiveness of the algorithm are verified by an example.
【作者单位】：电力传输与功率变换控制教育部重点实验室(上海交通大学);
【基金】：国家高技术研究发展计划863计划资助项目(2014AA052003) 国家自然科学基金资助项目(51307107) 高等学校博士学科点专项科研基金(20130073120034) 中央高校基本科研业务费专项资金资助项目~~
【分类号】：TM564

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