Adaptive-Grained Exponential Integrator Algorithm for Efficient Simulation of Power Converter Systems

IF 3.8 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Jared Paull;Carl Knickle;Nicole Lofroth;Liwei Wang;Wei Li
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引用次数: 0

Abstract

Electromagnetic transient (EMT) simulation is increasingly important for complex power electronic converter system design and validation. This paper proposes an adaptive-grained exponential integrator (AGEI) algorithm designed to efficiently simulate power electronic networks. The AGEI algorithm relies on precomputation of carefully-chosen discretization steps to reduce memory burden. It then performs sequential intermediate integrations between discrete switching events to accelerate transient simulation. The variable time-step, high-order integration algorithm finds a balance between simulation run-time and computational overhead. The AGEI algorithm varies the number of the forcing function terms to meet desirable error thresholds. The proposed algorithm is L-stable and can be flexibly applied to stiff and non-stiff circuit systems, rendering it suitable for a wide arrange of power converter topologies and parameters. A hardware experimental study validates the AGEI algorithm's accuracy while simulation case studies demonstrate the AGEI algorithm significantly improves numerical efficiency. It is shown in the typical converter case studies that the proposed algorithm enables more than 8-fold and 3-fold simulation speedup compared to popular simulation tools, i.e., Simulink and PLECS, respectively. The numerical efficiency gains of the proposed algorithm become more apparent for power converter circuits with only-DC input sources or stiff circuit systems.
用于高效模拟功率转换器系统的自适应粒度指数积分器算法
电磁瞬变仿真对于复杂电力电子变换器系统的设计和验证越来越重要。本文提出了一种自适应粒度指数积分器(AGEI)算法,旨在有效地模拟电力电子网络。AGEI算法依赖于精心选择的离散步骤的预计算,以减少内存负担。然后在离散开关事件之间执行顺序的中间积分以加速瞬态仿真。变时间步长、高阶积分算法在仿真运行时间和计算开销之间找到了平衡。AGEI算法通过改变强制函数项的个数来满足期望的误差阈值。该算法是l稳定的,可以灵活地应用于刚性和非刚性电路系统,适用于各种功率变换器拓扑结构和参数。硬件实验研究验证了AGEI算法的准确性,仿真案例研究表明AGEI算法显著提高了计算效率。典型的转换器案例研究表明,与流行的仿真工具(即Simulink和PLECS)相比,所提出的算法能够分别实现8倍和3倍以上的仿真加速。对于具有纯直流输入源的功率变换器电路或刚性电路系统,所提算法的数值效率增益更为明显。
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来源期刊
IEEE Transactions on Power Delivery
IEEE Transactions on Power Delivery 工程技术-工程:电子与电气
CiteScore
9.00
自引率
13.60%
发文量
513
审稿时长
6 months
期刊介绍: The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.
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