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LCL滤波器参数不确定性下并网逆变器的失效风险评估

Failure Risk Assessment of Grid-Connected Inverter With Parametric Uncertainty in LCL Filter

语言:

中文摘要

本文针对LCL滤波器参数不确定性导致的并网逆变器现场失效问题,提出了一种概率分析框架。该框架综合考虑了元件公差、运行点变化及老化效应,通过评估鲁棒稳定性和滤波性能,量化了逆变器的失效风险,为提升设备可靠性提供了理论支撑。

English Abstract

Grid-connected inverter failure may be caused by outliers of a population of units in field operation, due to the LCL filter parameter uncertainty. This article proposes a probabilistic framework to analyze the impact of multiple filter parameter variances due to component tolerances, operating points, and aging effects. Both robust stability and filter performance are selected as the risk of fail...
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SunView 深度解读

该研究直接关联阳光电源的核心产品——组串式及集中式光伏逆变器。LCL滤波器是逆变器并网的关键环节,其参数漂移(受环境温度、老化影响)直接影响并网稳定性与谐波性能。建议研发团队将该概率框架引入逆变器设计阶段,通过敏感度分析优化滤波器选型与控制参数鲁棒性。同时,可结合iSolarCloud平台的大数据分析,将现场运行数据与该失效模型比对,实现对逆变器并网性能的早期预警,有效降低运维成本,提升产品全生命周期可靠性。