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A low-voltage ride-through strategy using mixed potential function for three-phase grid-connected PV systems

机译：利用混合电位功能对三相网格连接的光伏系统的低压乘车策略

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摘要

This paper presents a new control strategy for low-voltage ride-through for 3-phase grid-connected photovoltaic systems. The proposed fault ride through control algorithm, which is designed based on mixed potential function, can protect the inverter from overcurrent failure under both symmetric and asymmetric faults, reduce the double frequency oscillation and provides reactive power support by applying a voltage compensation unit. With the proposed method, the inverter can also inject sinusoidal current during asymmetric faults. The method does not require a hard switch to switch from the Maximum Power Point Tracking (MPPT) to a non-MPPT algorithm, which ensures a smooth transition.
机译：本文介绍了用于3相网连接光伏系统的低压乘车的新控制策略。通过控制算法的建议故障乘坐，基于混合电位功能设计，可以在对称和不对称故障下保护逆变器免于过电流故障，减少双频振荡，并通过施加电压补偿单元提供无功功率支持。利用所提出的方法，逆变器还可以在不对称断层期间注射正弦电流。该方法不需要硬开关从最大功率点跟踪（MPPT）切换到非MPPT算法，这确保了平滑的转换。

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