并网变流器多速率联合仿真框架与基于泰勒级数的变步长求解器*

Q1 Engineering
Weicheng Liu;Zhengming Zhao;Han Xu;Yangbin Zeng;Liqiang Yuan
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引用次数: 0

摘要

并网变流器在配电网中发挥着越来越重要的作用。对电力电子和配电网进行电磁暂态仿真可以显著提高分析精度。然而,现有的仿真软件难以处理具有大量电力电子开关的配电网,导致仿真时间难以接受。为了解决这一问题,提出了一种系统分层的多速率协同仿真框架。根据时间尺度将系统分层划分为不同速率的子系统,采用不同仿真速率的求解器分别求解。针对电力电子系统,提出了一种基于泰勒级数的变步长求解器,并针对多速率接口设计了数值补偿算法,以提高系统的稳定性和精度。与商业软件相比,所提出的框架在涉及576个开关设备和14个总线配电网的研究案例中,将仿真速度提高了200倍以上,而相对误差的贡献不到1%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multi-rate Co-simulation Framework with Taylor-series-based Variable-step Solver for Grid-connected Power Converters*
Grid-connected converters (GPC) are playing an increasingly important role in distribution networks. Performing electromagnetic transient (EMT) simulations on power electronics and distribution networks can significantly improve the analysis accuracy. However, the existing simulation software struggles to handle distribution networks with a large number of power electronic switches, leading to unacceptable simulation times. To address this issue, a system-hierarchical multi-rate co-simulation framework is proposed. The system is hierarchically divided into different rate subsystems based on timescales, and solvers with different simulation rates are used to solve them separately. A Taylor-series-based variable-step solver is proposed for power electronic systems, and numerical compensation algorithms are designed for multi-rate interfaces to improve the system stability and accuracy. Compared with commercial software, the proposed framework increased the simulation speed by more than 200 times in the studied case, involving 576 switching devices and 14 bus distribution networks, while contributing less than 1% to the relative error.
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来源期刊
Chinese Journal of Electrical Engineering
Chinese Journal of Electrical Engineering Energy-Energy Engineering and Power Technology
CiteScore
7.80
自引率
0.00%
发文量
621
审稿时长
12 weeks
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