分布式控制下多并联并联变流器混合交直流微电网综合稳定性分析

Pengfeng Lin, Jinyang Fang, Chi Jin, Jianfang Xiao, Jinyu Wang, Koh Leong Hai, Peng Wang, Choo Hoong
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引用次数: 2

摘要

混合交/直流微电网(MG)是一种很有前途的电力系统架构,能够协调交流和直流能量转换。由于MG混合动力车型结构复杂,对其进行全面的稳定性分析仍然是一个难以克服的挑战。为了解决这个问题,本文将MG系统分解为几个电气模块,即交流电源、直流电源、多并联互连转换器(ic)和线路阻抗。这些模块首先在小信号感中单独建模。然后将它们结合起来,建立了描述混合动力MG动力学特性的完全自治数学表达式。为了研究MG系统的稳定性,通过评估所导出的数学模型的特征值轨迹,考察了不同工作点、线路阻抗和选定的关键控制参数对系统稳定性的影响。时域仿真结果表明,Matlab/Simulink给出的结果与特征值轨迹图吻合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comprehensive Stability Analyses for Hybrid AC/DC Microgrids with Multi-Paralleled Interlinking Converters under Distributed Control
Hybrid AC/DC microgrid (MG) is a promising electrical power system architecture that enables to harmonize AC and DC energy conversions. Due to the complicated configuration, comprehensive stability analyses for a complete hybrid MG still stand as an unsurmountable challenge. To address this issue, this paper decomposes the MG system into several electrical modules, i.e., an AC source, a DC source, multi-paralleled interlinking converters (ICs) and line impedances. These modules are first individually modeled in the small signal sense. They are then combined to establish a full autonomous mathematical expression for characterizing dynamics of the hybrid MG. To investigate MG system stability, the influences of diversified operating points, line impedances and the selected key control parameters are examined by evaluating eigenvalue loci of the derived mathematical model. Time-domain simulations reveal the perfect matching between the results given by Matlab/Simulink and eigenvalue loci plots.
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