双二极管模型是最能精确表述光伏电池特性的模型,但由于参数过多会增加求解难度,降低求解速度.为此提出一种参数简化的双二极管模型,并设计了对应的算法,将双二极管电流精确化,然后分别利用最大功率匹配法和牛顿迭代法求解参数.通过计算机仿真表明:不同光照和温度下的仿真结果与实际测试阵列的输出相一致,比单二极管Rp模型和双二极管Kashif模型的精度提高了68％和20％,且仿真时间缩短了63％和17％.该简化模型可以为光伏发电系统的优化配置和最大功率点跟踪提供快速和准确的研究基础.%Two-diode model is the most accurate expression to describe the characters of photovoltaic (PV) cell model.But too many parameters will increase the difficulty of the solution,and reduce the speed of the solution.In this paper,a two-diode simplified model is proposed to solve the above problems,and the corresponding algorithm is designed,which increases the current accuracy of the two diodes,and then solves parameters by the maximum power point tracking method and iterative method.The simulation results are consistent with the output results of the actual test array in different irradiation levels and temperatures.The accuracy of the simplified model is increased by 68％ and 20％ comparing with the single diode model and two-diode Kashif model respectively,and the simulation time is shortened by 63％ and 17％,respectively.Therefore the simplified model can be a fast and accurate research basis for the optimization configures and the maximum power point tracking of photovoltaic power generation system.
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