Irradiance estimation for a smart PV array
Irradiance estimation for a smart PV array
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智能光伏阵列的辐照度估计
DOI：
10.1109/ecce.2015.7309811
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Devarajan Srinivasan
中科院分区：
文献类型：
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作者：
Henry Braun;S. Peshin;A. Spanias;C. Tepedelenlioğlu;M. Banavar;Girish Kalyanasundaram;Devarajan Srinivasan
由于部分阴影，PV阵列中模块之间的电气不匹配会导致阴影模块以外的能量损失。之所以发生这种情况，是因为未阴影的模块被迫远离其最大功率点以补偿阴影。在这里，我们提出了一种辐照度估计算法，用于在不匹配的缓解系统中使用。使用模块电压，电流和背面温度的测量值估算辐照度。这些估计值可用于优化阵列的电气配置并减少由部分阴影引起的不匹配损失。检查了估计中错误的传播；我们发现，精度足以在提出的不匹配缓解应用程序中使用。
Electrical mismatch between modules in a PV array due to partial shading causes energy losses beyond the shaded module. This occurs because unshaded modules are forced to operate away from their maximum power point in order to compensate for the shading. Here we present an irradiance estimation algorithm for use in a mismatch mitigation system. Irradiance is estimated using measurements of module voltage, current, and back surface temperature. These estimates may be used to optimize an array's electrical configuration and reduce the mismatch losses caused by partial shading. Propagation of error in the estimation is examined; we find that accuracy is sufficient for use in the proposed mismatch mitigation application.