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应用于四桥臂电压源逆变器的快速无畸变短路检测与保护方案及故障穿越能力

Fast and Distortion-Free Short-Circuit Detection and Protection Scheme With Fault Ride-Through Capability Applied to Four-Leg VSI

语言:

中文摘要

本文针对带LC输出滤波器的三相四桥臂(3P4L)电压源逆变器,提出了一种快速无畸变的短路检测与保护方案。该方案旨在应对负载侧对称及非对称短路故障,通过快速响应保护半导体器件,同时具备故障穿越能力,确保系统在复杂负载工况下的可靠运行。

English Abstract

The three-phase four-leg (3P4L) voltage source inverter (VSI) with LC output filter is a suitable transformer-less topology to feed nonlinear and unbalanced loads in four-wire applications. Both symmetrical and asymmetrical short circuits can occur on the load-side. Moreover, due to the low thermal inertia of semiconductors, fast short-circuit protections are necessary to avoid damage by overheati...
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SunView 深度解读

该研究涉及的四桥臂逆变器拓扑在处理不平衡负载和四线制应用中具有优势,与阳光电源的工商业光伏逆变器及微电网解决方案相关。其提出的快速短路保护与故障穿越(FRT)策略,可提升阳光电源组串式逆变器在弱电网或复杂负载环境下的可靠性。建议研发团队参考该无畸变检测算法,优化现有逆变器在极端故障工况下的保护逻辑,以增强产品在电网波动时的鲁棒性,进一步提升iSolarCloud智能运维平台对故障预警的精准度。