摘要
基于太阳电池正向/反向输出特性模型,研究故障对光伏组串I-V输出特性曲线的影响,建立光伏组串多峰输出特性模型。根据光伏组串输出电压的叠加特性,获得组串多峰分离方法,从而提出一种面向具有多峰输出特性曲线的光伏组串模型参数计算方法。从多峰输出特性曲线的首峰开始,利用改进粒子群算法计算当前波峰对应的单元模型参数,再通过多峰分离方法,结合计算所得的首峰至当前波峰对应的所有模型参数,从下一波峰中分离得到单峰曲线,计算对应模型参数,多峰分离与单峰参数计算交替进行,直至尾峰,完成所有模型参数计算。实验结果表明:所建光伏组串多峰输出特性模型能可靠模拟不同故障下光伏组串输出特性,所提基于多峰分离的光伏组串多峰参数计算方法能准确计算不同故障下光伏组串模型参数。
Based on the forward/reverse output characteristic model of solar cells,the influence of fault modules on the I-V output characteristic curve of photovoltaic string is studied,and a multi peak output characteristic model of photovoltaic string is established.Based on the superposition characteristics of photovoltaic string output voltage,a multi peak separation method for string is obtained,and a parameter calculation method for photovoltaic string model with multi peak output characteristic curves is proposed.Starting from the first peak of the multi peak output characteristic curve,the improved particle swarm optimization algorithm is used to calculate the unit model parameters corresponding to the current peak.Then,through the multi peak separation method,combined with the calculated first peak to all model parameters corresponding to the current peak,the single peak curve is separated from the next peak,and the corresponding model parameters are calculated.The multi peak separation and single peak parameter calculation alternate until the tail peak,and all model parameter calculations are completed.The experimental results show that the established multi peak output characteristic model of photovoltaic string can reliably simulate the output characteristics of photovoltaic string under different faults;The proposed multi peak separation based photovoltaic string multi peak parameter calculation method can accurately calculate the photovoltaic string model parameters under different faults.
作者
沈敏翔
郭倩
卫东
陆挺
Shen Minxiang;Guo Qian;Wei Dong;Lu Ting(College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou 310018,China;College of Modern Science and Technology,China Jiliang University,Hangzhou 310018,China)
出处
《太阳能学报》
北大核心
2025年第3期320-327,共8页
Acta Energiae Solaris Sinica
基金
浙江省基础公益研究计划(LGG22E070003,LGG20E070003)
浙江省属高校基本科研业务费专项资金(2021YW42)。
关键词
太阳电池
参数提取
粒子群算法
多峰分离
光伏组串
solar cells
parameter extraction
particle swarm optimization
multi-peak separation
photovoltaic string
