摘要
由于太阳能的间歇性和不稳定性,光伏发电系统的输出功率会随天气条件变化而波动,这对电网的稳定性构成了挑战。储能技术的应用可以保证光伏发电的连续性和稳定性。考虑到单一储能联合光伏发电系统的不足,本文提出了一种结合超级电容与化学电池储能的光伏发电系统多工况优化控制策略。通过控制系统指令切换光伏DC/DC变换器、化学电池储能双向DC/DC变换器、超级电容储能双向DC/DC变换器以及DC/AC并网变换器在正常并网、低电压穿越和孤岛运行工况下的控制方式,实现对电网的稳定支持,延长储能设备的使用寿命,降低维护成本。最后利用Matlab/Simulink软件仿真验证了所提方法的有效性。
Due to the intermittent and unstable nature of solar energy,the output power of photovoltaic power genera-tion systems will fluctuate with weather conditions,posing a challenge to the stability of the grid.The application of energy storage technology can ensure the continuity and stability of photovoltaic power generation.Considering the lim-itations of single energy storage combined with photovoltaic power generation systems,a multi-scenario optimization control strategy is proposed for a photovoltaic power generation system combining supercapacitors and chemical batter-ies for energy storage.By controlling the switching of system commands between the photovoltaic DC/DC converter,the chemical battery energy storage bidirectional DC/DC converter,the supercapacitor energy storage bidirectional DC/DC converter,and the DC/AC grid-connection converter in normal grid connection,low voltage ride-through,and island operation scenarios,to achieve stable support for the grid,extend the service life of energy storage devices,and re-duce maintenance costs.Finally,the effectiveness of the proposed method is verified by simulation using Matlab/Si-mulink software.
作者
吕道鑫
姜雪
李珺
韩学娟
LU Dao-xin;JIANG Xue;LI Jun;HAN Xue-juan(State Grid Gansu Electric Power Company Jiuquan Power Supply Company,Jiuquan 735000,China)
出处
《电力电子技术》
2025年第5期82-86,共5页
Power Electronics
基金
国网甘肃省电力公司酒泉供电公司科技项目(522706230006)。
关键词
光伏发电
混合储能系统
多工况
photovoltaic power generation
hybrid energy storage system
multiple operating conditions
