具有多个最大功率点跟踪装置的光伏系统功率转换输出的估计方法

S. Pisklak, M. Mills, C. Quinn
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引用次数: 0

摘要

常用的光伏系统性能估计器只允许一个逆变器输入。然而,新产品有多个逆变器输入。为了在新产品中使用这些估计器,通常采用“直求和”方法:将每个字符串视为一个独立的数组,并对结果进行数学求和。由此估计的系统产量包括与效率曲线形状有关的误差。为了计算该误差,本文描述了一种新的性能估计方法。对于Dow™POWERHOUSE™系统,根据阵列的位置和方向,发现直求和方法的性能不足2.7-4.0%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Method for estimating the power conversion output in photovoltaic systems with more than one maximum power point tracking device
The commonly-used photovoltaic system performance estimators allow for only a single inverter input. New products, however, have multiple inverter inputs. To use these estimators with the newer products, a “Straight-Sum” method is typically employed: each string is treated as an independent array and the results are mathematically summed. The resultant estimated system yield includes an error associated with the efficiency curve shape. To calculate this error, a new performance estimate method is described here. For the Dow™ POWERHOUSE™ system, the Straight-Sum method was found to under-represent performance by 2.7-4.0%, depending on array location and orientation.
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