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弱电网下不同直流母线电压控制器的虚拟同步机阻抗分析与稳定性研究

Impedance Analysis and Stabilization of Virtual Synchronous Generators With Different DC-Link Voltage Controllers Under Weak Grid

语言:

中文摘要

本文研究了虚拟同步机(VSG)在弱电网环境下,因直流母线电压控制器实现方式不同而导致的系统不稳定性问题。通过建立VSG在dq坐标系下的宽频阻抗模型,揭示了弱电网下直流侧控制与交流侧并网性能的耦合机制,并提出了相应的稳定性优化策略。

English Abstract

In recent years, the virtual synchronous generator (VSG) concept has been widely studied to integrate renewable energy sources. However, instability occurs due to the implementation of the dc-link voltage controllers under the weak grid, and its mechanism remains unclear, which is investigated in this article. At first, the wideband dq-frame impedance models of the VSGs with the dc-link voltage co...
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SunView 深度解读

该研究直接关联阳光电源的核心构网型(Grid-Forming)技术。随着全球光伏与储能电站接入弱电网比例提升,VSG技术是提升系统支撑能力的关键。文章提出的阻抗建模与稳定性分析方法,可指导阳光电源PowerTitan系列储能PCS及组串式逆变器在复杂电网环境下的控制参数优化,有效避免弱电网下的振荡风险。建议研发团队将该阻抗分析模型集成至iSolarCloud仿真平台,用于项目前期电网适应性评估,提升产品在弱电网场景下的并网稳定性和鲁棒性。