Small-Signal Modeling and Analysis of Virtual Inertia-Based PV Systems
Small-Signal Modeling and Analysis of Virtual Inertia-Based PV Systems
复制标题
基于虚拟惯性的光伏系统的小信号建模和分析
DOI：
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发表时间：
2020
影响因子：
4.9
通讯作者：
Wenxin Liu
中科院分区：
文献类型：
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作者：
J. Khazaei;Zhenghong Tu;Wenxin Liu
可再生能源通常提供低惯性，这为控制系统留出了很少的时间。为了克服光伏发电的小惯性，提高光伏发电的能源效率，最近引入了惯性仿真技术。本文的主要目的是分析一种适用于智能电网的基于虚拟惯性的三相两级光伏系统的稳定性。在建模过程中考虑了DC/DC、DC/AC、交流侧滤波器、虚拟惯性控制器以及DC/DC和DC/AC转换器的控制器的动态特性。利用特征值分析方法评价了设计参数对虚拟惯性光伏系统稳定性的敏感性。利用MatLab/Simscape电力系统工具箱进行了时域仿真，对特征值分析结果进行了验证。
Renewable energy sources normally provide low inertia, which allows a little time for controlling the system. The inertia emulation has recently been introduced for photovoltaic (PV) generation to fight against the small inertia and improve the energy efficiency. The main purpose of this article is to analyze the stability of a virtual inertia-based three-phase two-stage PV system for smart grid applications. Dynamics of DC/DC converter, DC/AC converter, AC side filter, virtual inertia controller, and controllers of the DC/DC and DC/AC converters are considered in the modeling procedure. Eigenvalue analysis is performed to evaluate the sensitivity of the design parameters on stability of a grid-connected virtual inertia PV system. Time-domain simulations using MATLAB/Simscape Power System toolbox are used to validate the eigenvalue analysis results.