In this article, simplified and easy-to-work-with equations for the Lambert W-function are derived. This function is widely used to solve equations related to photovoltaic systems. More specifically, this mathematical function represents a useful tool when modeling solar cells/panels performance (that is, the current-voltage curve) by analytical approaches. However, the Lambert W-function has a complex solving process which might represent an unaffordable mathematical challenge for a great number of professionals/technicians in the photovoltaic industrial sector. Simple approximations for the Lambert W-function on both of its branches (positive and negative) are proposed in this article. The results of the present article show a simple but accurate way for photovoltaic systems modeling, even when these systems comprise a maximum power point tracking subsystem.

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简化的Lambert W函数数学方程式在光伏系统建模中的应用

在本文中，得出了Lambert W函数的简化且易于使用的方程式。该函数被广泛用于求解与光伏系统有关的方程。更具体地说，当通过分析方法对太阳能电池/电池板性能（即电流-电压曲线）进行建模时，该数学函数表示一种有用的工具。然而，Lambert W函数具有复杂的求解过程，对于光伏工业领域的许多专业人士/技术人员而言，这可能代表着难以承受的数学挑战。本文提出了Lambert W函数在其两个分支（正负）上的简单近似。本文的结果显示了一种简单但准确的光伏系统建模方法，