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考虑顺序切换方案的基于锁相环的可再生能源发电机建模与暂态同步稳定性分析

Modeling and Transient Synchronization Stability Analysis for PLL-Based Renewable Energy Generator Considering Sequential Switching Schemes

语言:

中文摘要

本文研究了基于锁相环(PLL)的可再生能源发电机(REG)在电网故障下的同步特性。通过分析PLL的非线性行为及控制系统内部的顺序切换动作,揭示了其对系统暂态同步稳定性的影响,为提升光伏及储能逆变器在弱电网环境下的并网稳定性提供了理论支撑。

English Abstract

The synchronization characteristics of phase-locked loop (PLL) based renewable energy generators (REG) are considerably sensitive to the grid condition and the inner sequential switching actions of their control system, especially suffered from grid faults. In this article, the general output characteristics of REG systems are investigated considering the nonlinear behaviour of PLL. In addition, g...
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SunView 深度解读

该研究直接关系到阳光电源组串式逆变器及PowerTitan/PowerStack储能变流器在复杂电网环境下的运行稳定性。随着电网弱化,基于PLL的跟网型(GFL)控制策略在故障期间极易发生失稳。建议研发团队参考文中的非线性建模方法,优化逆变器在电网电压跌落或切换过程中的锁相环动态响应,提升产品在弱电网下的低电压穿越(LVRT)能力及抗干扰性能,从而增强iSolarCloud平台对电站并网稳定性的监测与预警能力。