A general modeling method for I–V characteristics of geometrically and electrically configured photovoltaic arrays
A general modeling method for I–V characteristics of geometrically and electrically configured photovoltaic arrays
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DOI：
10.1016/j.enconman.2011.07.011
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发表时间：
2011-11
影响因子：
10.4
通讯作者：
Guangyu Liu;S. Nguang;A. Partridge
中科院分区：
文献类型：
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作者：
Guangyu Liu;S. Nguang;A. Partridge
提出了一种对典型光伏阵列和组件进行建模的通用方法，以求求几何和电气上不同配置的光伏阵列或组件的准确的电流和电压关系。在不增加任何虚拟电气元件的情况下，数值构造了太阳能电池阵列或组件系统中电气设备的非线性特征方程。然后，用一种稳健的阻尼牛顿法求出这些一般非线性方程的精确的I-V关系，保证了收敛。该模型可以处理不同的失配效应，如旁路二极管的不同配置，以及部分阴影。还考虑了光伏组件的几何坐标，以便于对实际物理配置进行建模。对一个由混凝土结构部分遮挡的48个组件的光伏阵列进行了仿真，验证了该方法的有效性和优越性。
A general method for modeling typical photovoltaic (PV) arrays and modules is proposed to find the exact current and voltage relationship of PV arrays or modules of geometrically and electrically different configurations. Nonlinear characteristic equations of electrical devices in solar array or module systems are numerically constructed without adding any virtual electrical components. Then, a robust damped Newton method is used to find exact I–V relationship of these general nonlinear equations, where the convergence is guaranteed. The model can deal with different mismatch effects such as different configurations of bypass diodes, and partial shading. Geometry coordinates of PV components are also considered to facilitate the modeling of the actual physical configuration. Simulation of a PV array with 48 modules, partially shaded by a concrete structure, is performed to verify the effectiveness and advantages of the proposed method.