光伏电站接入对电能质量的影响及其对策措施研究

摘要

大规模光伏发电系统在新能源的发展中有着十分重要的地位。首先，分析了大规模光伏发电系统的特点，重点阐述了光伏发电对电能质量造成的主要影响以及其原因；然后，为了更好地研究光伏并网系统的稳定性，接着讨论了大规模光伏建模的动态以及静态模型；同时分析了谐波、电压质量对电能质量的影响，讨论了电网非对称故障情况下的过电压/过电流问题以及低压穿越技术和孤岛监测技术等；最后，总结了国内外相关的对策和措施，为大规模光伏并网发电系统的规划、仿真、以及控制策略等提供了相应的参考。%Large-scale grid-connected solar generation system plays an important role in the development of new energy sources. Firstly, this paper analysis the characteristics of large-scale photovoltaic power generation system, and the main impacts on the power grid with large-scale PV integration are elaborated. In addition , this paper also reviews the dynamic and static models for better stability studies, and the influence of the harmonic and voltage quality on the power quality is analyzed, the overvoltage/overcurrent problems under unbalanced grid faults, low voltage ride through (LVRT) technology and islanding detection technology are also presented. Finally, the corresponding solutions and countermeasures are summarizes, and the references are offered to readers from the perspective of power system planning, simulation and control strategy.