并网光伏系统低电压穿越策略综述

针对光伏电源大规模接入电网后引起的电网稳定问题,对国内外电网故障时光伏低压穿越策略的研究成果进行了梳理与总结。首先分析了目前我们国家对光伏低电压穿越能力的要求以及实现途径;然后分别阐述了外加辅助设备和逆变器控制两大策略具体实现低电压穿越的各种方式以及发展情况;再对两大类穿越策略以及各种实现方式的优缺点进行了分析和总结,并为光伏低电压穿越策略的后续研究提供了建议和参考。研究结果表明,上述两类低压穿越策略可以按实际情况单独或配合使用,这样能更经济有效的实现光伏的低电压穿越。

Review of low voltage ride through strategy in grid-connected photovoltaic system

Aiming at solving stability problems of the power grid when large-scale Photovoltaic is connected. it is very necessary to reorganize and summarize the research results on Photovoltaic low voltage ride through strategies while a power failure from home and abroad. Firstly, current requirements on Photovoltaic power low voltage ride-through capability in China and the approaches to achieve them are analyzed.Secondly, concrete approaches to achieve low voltage ride through and their developments are elaborated respectively with two strategies which are additional auxiliary equipment and inverter control. Then the advantages and disadvantages of the two ride-through strategies and their approaches are analyzed and summarized. This paper provides suggestions and references for further study on Photovoltaic power low voltage ride through strategies. Finally, The results indicate that Both types of low voltage ride through strategies can be used either alone or combined according to the actual situation in order to be more effective and economical. ABSTRACT FROM AUTHOR]