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首页> 外文期刊>IEEE Transactions on Industrial Electronics >An Estimator of Solar Irradiance in Photovoltaic Arrays With Guaranteed Stability Properties
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An Estimator of Solar Irradiance in Photovoltaic Arrays With Guaranteed Stability Properties

机译：具有稳定特性的光伏阵列中太阳辐照度的估计

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摘要

Photovoltaic cells are characterized via a static relationship that describes their current–voltage relationship. This relationship is a complicated implicit algebraic equation that depends, in a nonlinear way, on two critical uncertain parameters: temperature and solar irradiance. The efficient operation of the panel relies on the knowledge of these key parameters. While it is technologically feasible to measure the former, a sensor for the latter is usually expensive and difficult to calibrate. In this paper, we propose a globally convergent estimator for solar irradiance which is developed using the principles of immersion and invariance recently reported in the control literature. To design the estimator, a suitable reparameterization of the current–voltage characteristic, which effectively exhibits a monotonic behavior, is introduced. The approach is validated through detailed computer simulations and experimental prototyping using real outdoor measurements.
机译：光伏电池通过描述其电流-电压关系的静态关系来表征。这种关系是一个复杂的隐式代数方程，它以非线性方式取决于两个关键的不确定参数：温度和太阳辐照度。面板的有效操作取决于对这些关键参数的了解。尽管测量前者在技术上是可行的，但是用于后者的传感器通常很昂贵并且难以校准。在本文中，我们提出了一种用于太阳辐照度的全局收敛估计器，该估计器是使用控制文献中最近报道的浸没和不变性原理开发的。为了设计估计器，引入了有效地表现出单调性的电流-电压特性的适当重新参数化。通过详细的计算机模拟和使用实际室外测量的实验原型验证了该方法。

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