光伏逆变器电感元件及其技术趋势

Photovoltaic Power System Reactor and Its Technical Trend

本文通过对光伏并网系统的总结，分析了从小功率微逆变器到集中式发电站型光伏逆变器等各种电路拓扑．系统地阐述了各种并网逆变器对其核心电感元件的特性要求；并针对现有电感存在的性能缺陷，提出了一套利用混合磁路技术、磁集成等技术进行新型高性能电感设计的解决方案；新方案的特性在体现欧效和美国加州能源效率要求的同时，兼顾了效率和成本的平衡；本文还通过结合电源技术发展的特点，明确了今后光伏电感技术的发腱趋势和方向。

According to summarizing and analyzing the photovoltaic power system of micro inverter, residential inverter, commercial inverter and central ＆ station inverter topologies, critical specification requirements are stated for PV reactors as the core passive components. After analyzing the defects of normal PV reactors such as amorphous and silicon steel reactors, a novel high efficient reactor designing method and principle is introduced with using hybrid magnetics and integrated magnetics technology. Combined with Euro Efficiency and CEC Efficiency requirements, the new reactor L-I curve achieves both high efficiency and best cost balance. Finally, a new view of PV reactor technical trend also is indicated by connecting with the development of power electronics technology.