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基于零序电流的并联逆变器系统开路故障诊断方法

Zero-Sequence Current Based Diagnostic Method for Open-Switch Fault Detection in Parallel Inverters System

语言:

中文摘要

本文提出了一种实用的在线开路故障诊断方法,专门用于检测并联逆变器系统中的功率开关管开路故障。该方法通过分析零序电流特征,能够有效缓解过流应力,避免并联系统中的电气元件发生二次故障,从而提升系统的可靠性。

English Abstract

In this paper, a practical online open-switch fault detection method is presented. The proposed open-switch fault detection method is used to detect the open-circuited fault switch in the parallel inverters system. This method can relieve the severe effects of the over-current stress, to avoid the secondary fault to the electrical components in the parallel inverters system. This method is based o...
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SunView 深度解读

该技术对阳光电源的组串式及集中式光伏逆变器具有重要应用价值。在大型地面电站及工商业场景中,多机并联运行是主流架构,功率器件的开路故障诊断直接关系到系统的可用率与运维成本。该方法通过零序电流实现故障定位,无需额外传感器,易于集成至iSolarCloud智能运维平台。建议研发团队将其转化为在线诊断算法,嵌入到逆变器控制固件中,实现故障的实时预警与精准定位,从而降低售后运维压力,提升阳光电源产品的全生命周期可靠性。