System Analysis of 1-Axis Three-Position Tracking Solar PV

單軸三角度追蹤太陽光發電系統設計分析

黃秉鈞(Bin-Juine Huang) ； 孫輔笙(Fu-Sheng Sun)

《中國機械工程學刊》 28卷3期 (2007/06) Pp. 307-313

https://doi.org/10.29979/JCSME.200706.0007

摘要

A new PV design, called ＜||＞1-axis three-position tracking PV module＜||＞, was proposed in the present study. Every PV module is mounted on an individual sun tracking frame. The 1-axis tracking mechanism adjusts the PV position only at three fixed angles (three-position tracking): morning, noon, and afternoon. This ＜||＞1-axis three-position sun tracking PV module＜||＞ can be designed in a simple structure with low cost. A design analysis of the 1-axis three-position sun tracking PV module was carried out in the present study. The analytical results show that the optimal stopping angle β is about 50° and the optimal switching angle is half of the stopping angle, i.e. θ(subscript H)=β/2, and both are independent of the latitude. The analysis also indicates that the effect of installation misalignment away from the true south direction is negligible (＜2%) if the alignment error is less than 15°. At mid-low latitude region φ＜40°, the reduction of power generation due to misalignment is only about 5% even if the alignment error is 35°. The analytical results show that the present 1-axis three-position sun tracking PV module is quite promising in cost reduction. It is estimated that the cost reduction for the present 1-axis three-position PV tracking module is about 15%.

並列摘要

A new PV design, called ＜||＞1-axis three-position tracking PV module＜||＞, was proposed in the present study. Every PV module is mounted on an individual sun tracking frame. The 1-axis tracking mechanism adjusts the PV position only at three fixed angles (three-position tracking): morning, noon, and afternoon. This ＜||＞1-axis three-position sun tracking PV module＜||＞ can be designed in a simple structure with low cost. A design analysis of the 1-axis three-position sun tracking PV module was carried out in the present study. The analytical results show that the optimal stopping angle β is about 50° and the optimal switching angle is half of the stopping angle, i.e. θ(subscript H)=β/2, and both are independent of the latitude. The analysis also indicates that the effect of installation misalignment away from the true south direction is negligible (＜2%) if the alignment error is less than 15°. At mid-low latitude region φ＜40°, the reduction of power generation due to misalignment is only about 5% even if the alignment error is 35°. The analytical results show that the present 1-axis three-position sun tracking PV module is quite promising in cost reduction. It is estimated that the cost reduction for the present 1-axis three-position PV tracking module is about 15%.

並列關鍵字

solar photovoltaic ； solar power ； tracking PV