基于Parareal算法的VSCHVDC电磁暂态计算方法
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胡洁(1993),女,硕士研究生,主要从事电力系统电磁暂态仿真计算的研究;Email:hujietime@163.com

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TM744


Electromagnetic transient calculation method of VSCHVDC based on Parareal algorithms
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    摘要:

    针对VSCHVDC系统,考虑Parareal并行计算方法的并行性与高效性特点,提出一种电磁暂态计算问题方法,以提高VSCHVDC系统电磁暂态计算速度与数值精度。首先,建立VSCHVDC时域动态模型,并使用Parareal方法进行计算,该方法通过划分整个仿真时间为一系列子区间,将各子区间内的初始值用一组满足网络初始条件的近似解来表示;其次,利用这组初始值在各子区间内单独、同时进行计算求解;最后,通过预估-校正的方法得到精细解。算例测试表明:该算法可获得有效的加速比及较高的并行效率,应用于VSCHVDC系统电磁暂态数值仿真中能显著提高计算速度。

    Abstract:

    In order to improve calculation speed for the electromagnetic transient of VSCHVDC system without lossing accuracy,the Parareal method is applied to the electromagnetic transient simulation of VSCHVDC. At the beginning,the VSCHVDC time domain dynamic model is established. Then the model is calculated by employing the Parareal method. This method can decomposed the whole simulation time into a series of subintervals and a coarse approximation of the trajectory is utilized to supply the initial conditions at each subinterval. Secondly, using this set of initial values solves the evolution problems at each subinterval concurrently and separately. Then a fine solution is obtained by using an estimatecorrection method. The experimental results show that the algorithm can obtain a more effective speed ratio with a high parallel efficiency. It can improve the calculation speed of VSCHVDC system in electromagnetic transient numerical simulations.

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胡 洁,邹念佐,杨 萌,等.基于Parareal算法的VSCHVDC电磁暂态计算方法[J].电力科学与技术学报,2020,35(2):107-112.
HU Jie, ZOU Nianzuo, YANG Meng, et al. Electromagnetic transient calculation method of VSCHVDC based on Parareal algorithms[J]. Journal of Electric Power Science and Technology,2020,35(2):107-112.

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  • 在线发布日期: 2020-09-03
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