Performance analysis of a directly coupled photovoltaic water-pumping system
Performance analysis of a directly coupled photovoltaic water-pumping system
复制标题
直耦合光伏提水系统性能分析
DOI：
10.1109/tec.2004.827032
复制
发表时间：
2003
影响因子：
4.9
通讯作者：
D. P. Kothari
中科院分区：
文献类型：
--
作者：
Mohan Kolhe;J. C. Joshi;D. P. Kothari
在发展中国家的偏远地区，越来越多地采用独立的直接耦合光电机电系统进行抽水。在这项工作中，光伏供电的直流永磁（PM）电机与离心泵耦合的性能进行了分析，在不同的太阳能强度和相应的电池温度。通过实验得到的结果与计算值进行了比较，它是观察到，该系统具有良好的匹配之间的光伏阵列和机电系统的特性。通过手动跟踪（即，改变光伏阵列的方向，每天三次面对太阳），与固定倾斜的光伏阵列相比，获得的输出多20%。已经观察到，PV机电系统在低太阳强度下的扭矩-速度曲线应当比在较高太阳强度下更陡，并且负载扭矩-速度曲线应当在具有低起动扭矩的操作区域中尽可能地陡。性能分析将有助于选择合适的光伏机电系统的水泵应用。
The application of a stand-alone directly coupled photovoltaic (PV) electromechanical system for water pumping has increased in remote areas of developing countries. In this work, the performance of a PV-powered dc permanent-magnet (PM) motor coupled with a centrifugal pump has been analyzed at different solar intensities and corresponding cell temperature. The results obtained by experiments are compared with the calculated values, and it is observed that this system has a good match between the PV array and the electromechanical system characteristics. Through manual tracking (i.e., changing the orientation of PV array, three times a day to face the sun) the output obtained is 20% more compared to the fixed tilted PV array. It has been observed that the torque-speed curve at low solar intensities for a PV electromechanical system should be steeper than at higher solar intensities, and the load torque-speed curve should be as steep as possible in the operating region with low starting torque. The performance analysis will be helpful to select the suitable PV electromechanical system for water-pumping applications.