This article revises and updates the electromagnetic compatibility (EMC) challenges commonly encountered in utility-scale grid-connected photovoltaic (PV) systems in light of modern trends. This article examines the issues related to the conductive and radiated radio-frequency disturbances, in the range from 150 kHz to 1 GHz, of multi-MWp PV plants as designed nowadays, with high-power bifacial modules, single-axis trackers, and decentralized high-density inverters. The main features include the extensive dc and ac cabling, the capacitance toward the Earth of the PV source, the common-mode disturbance caused by inverters, the effect of safety and functional grounding, the galvanic isolation provided by step-up power transformers, and the presence of resonant circuits for common-mode leakage currents. Measurements in situ for both conducted and radiated disturbances in a 19.87 MWp plant placed in Ferrandina, South Italy, are presented and discussed. Guidelines for achieving an EMC functional safety by design are provided, raising from the analysis of the measured data.

中文翻译：

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大功率并网光伏发电厂的 EMC 问题：15 年后的更新


本文根据现代趋势，修订和更新了公用事业规模并网光伏 （PV） 系统中常见的电磁兼容性 （EMC） 挑战。本文研究了当今设计的多 MWp 光伏电站在 150 kHz 至 1 GHz 范围内的导电和辐射射频干扰相关问题，这些发电厂采用高功率双面组件、单轴跟踪器和分散式高密度逆变器。主要特点包括广泛的直流和交流电缆、光伏电源对地电容、逆变器引起的共模干扰、安全和功能接地的效果、升压电源变压器提供的电流隔离以及共模泄漏电流谐振电路的存在。介绍并讨论了位于意大利南部费兰迪纳的 19.87 MWp 发电厂的传导和辐射干扰的原位测量。本文提供了通过设计实现 EMC 功能安全的指南，这些指南从测量数据的分析中得出。