【摘要】 随着“双碳”战略目标推进，光伏发电已成为电力能源的重要组成部分。光伏系统由大量的电力电子器件和设备组成，在遭受雷击时直流侧产生的过电压容易导致电力电子器件和设备损坏。目前光伏系统防雷缺乏有效的理论方法指导，特别是在光伏组件接地建模以及混合AC/DC系统的电磁瞬态计算上仍存在一定的空白。针对上述问题，基于部分元件等效电路(partial element equivalent circuit, PEEC)法和多传输线(multi transmission line, MTL)法，该文提出了部分元件等效电路-多传输线(PEEC-MTL)混合方法，对光伏阵列接地效果以及整体系统接地布局的影响进行了深入探讨。研究发现，将光伏阵列接入交流电网有助于降低系统遭受雷击时的过电压水平；此外，电缆两端安装防雷装置和电缆护套两端接地更有利于设备安全。更多还原

【Abstract】 With the promotion of the dual carbon target, photovoltaic(PV) power generation has become an important part of electricity energy systems. Photovoltaic systems consist of a large number of power electronic devices and equipment. Over-voltage generated on the DC side during lightning strikes can easily cause damage to these power electronic devices and equipment. Currently, there is a lack of effective theoretical guidance for lightning protection in photovoltaic systems, particularly in the modeling of photovoltaic module grounding and electromagnetic transient calculations in hybrid AC/DC systems, which still have certain gaps.In response to the above issues, based on the Partial Element Equivalent Circuit(PEEC) method and the Multi Transmission Line(MTL) method, this paper proposes a PEEC-MTL hybrid method. We conducted in-depth research on the grounding effect of photovoltaic arrays and its impact on the overall system grounding layout. The results show that when the DC side of the PV system is hit by direct lightning, the DC line would produce serious over-voltage. Connecting the PV array to the entire AC system helped to reduce the over-voltage of the system. In addition, installing lightning protection devices at both ends of the cable and grounding both ends of the cable sheath were more conducive to equipment safety.更多还原