共查询到19条相似文献,搜索用时 156 毫秒
1.
为实现太阳能电池板对太阳光能的最高转换率,改变传统太阳能电池板固定安装对太阳光能利用低下的弊端。本文以光敏电阻构成跟踪器,并利用西门子的S7200系列PLC和MM440设计太阳能单轴自动跟踪系统。该太阳能单轴自动跟踪系统可实现在有太阳光照射的情况下,在任意时刻让太阳光直射太阳能电池板,同时解决了风力过大时太阳能电池板的防风问题。 相似文献
2.
3.
卫星太阳能电池板将太阳能转换为电能,是卫星能源供应系统的重要组成部分。为了实现能源利用率的最大化,设计了基于DSP的太阳能电池板姿态控制系统。通过控制太阳能电池板姿态,太阳能电池板可以完成太阳光的最有效采集,提高太阳能电池板的光电转换效率。首先,依据太阳能电池板输出短路电流与太阳光照强度成正比这一原理,测量出太阳光相对于太阳能电池板的入射角;然后,利用DSP处理并生成电机控制信号;最后,驱动步进电机转过相应角度,完成姿态控制,从而使电池板达到最大采光率。测试结果表明,控制系统显著提高了太阳能电池板的采光率,性能稳定,为卫星能源利用率最大化提供了可靠保障。 相似文献
4.
5.
为了提高太阳能光伏电池的光电转化效率,设计了一种能够自动跟踪太阳光照射角度的双轴自动跟踪系统.设计了4个分布式光敏电阻对比分析各点所受光照强度,设计了电压比较器实时反映太阳方位,设计了H桥电机驱动芯片,驱动两个直流电机按相应的方位角转动,实现实时跟踪.该太阳光入射角光电检测装置结构简单、成本低、灵敏度高,受外界环境影响较低,不仅可以作为演示实验装置,还可以扩展为实用的太阳能发电的自动跟踪系统. 相似文献
6.
7.
太阳能板自动对准装置的设计 总被引:1,自引:1,他引:0
构建了基于四象限探测器的双轴机械式自动跟踪定位装置,以低功耗单片机MSP430为核心,设计了使太阳能板始终保持与太阳光垂直的自动跟踪系统,大大提高了太阳能的利用效率.采用高性能的放大电路、滤波电路、A/D转换电路及精密步进系统,控制精度高,直线跟踪精度达到0.25μm,视场的跟踪角精度为0.25mrad,满足设计要求,对于太阳能的应用技术具有较大的参考价值,具有广泛的应用潜力. 相似文献
8.
为提高太阳能电池光电转换效率,设计了不得一种太阳能双轴全自动聚光跟踪控制系统,使可以放多个太阳能电池模块的框架平台可以跟踪太阳光旋转,并保持框架平台上的太阳能电池与阳光入射角保持垂直,以达到光能的最大获取率。在考虑太阳的运动轨迹模型的基础上,设计出可以同时跟踪太阳轨迹的二轴框架平台结构,方位轴和俯仰轴。在考虑晴天和阴天等复杂天气情况下,设计太阳运行轨迹跟踪方式和光传感器跟踪方式相结合的自适应智能跟踪方法,全自动地准确跟踪太阳的位置,跟踪精度小于0.4°,最大限度的接收太阳能,提高了太阳能光电转换的效率。 相似文献
9.
在光伏发电自动跟踪系统中,光强检测作为一个重要环节直接决定自动跟踪的效果。本文以Atmaga8作为光强检测控制核心,利用TSL2560T光强传感器对太阳能电池板的光强进行采集,通过对硬件设计和软件编程,光强检测模块能够采集精确的光强值,使得太阳能电池板始终朝向光强最大的方向,达到自动跟踪的效果。 相似文献
10.
11.
本文研制了一种用于碟式太阳能聚能器的太阳自动跟踪系统,该系统利用高精度的PSD(Position Sensitive Detector,位置敏感探测器)传感器来获取太阳的指向位置,通过ARM7微控制器S3C44BOX控制高精度机械转台转动,从而使聚能器指向太阳光入射方向。全文设计论证了系统软、硬件的实现方案,并研制出了相应的系统平台。实际测试结果表明,相比固定朝向式的聚能器,该系统对太阳能的采集效率能够提高约30%。 相似文献
12.
Christopher Kerestes Yi Wang Kevin Shreve James Mutitu Tim Creazzo Paola Murcia Allen Barnett 《Progress in Photovoltaics: Research and Applications》2013,21(4):578-587
Transparent silicon solar cells can lead to an increased efficiency of silicon‐based multi‐junction assemblies by transmitting near and below band gap energy light for conversion in a low band gap solar cell. This analysis shows that the maximum efficiency gain for a low band gap solar cell beneath silicon at a concentration of 50 suns is 5.8%, based on ideal absorption and conversion of the photons. This work analyzes the trade‐offs between increased near band edge absorption in the silicon and silicon solar cell transparency. Application of these results to real cases including a germanium bottom solar cell is analyzed, leading to a range of cases with increased system efficiency. Non‐ideal surfaces and real silicon and germanium solar cell device performance are presented. The range of practical system gains may be as low as 2.2 – 1% absolute when compared with the efficiency of a light‐trapped silicon solar cell for 1‐sun operation, based on this work. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
13.
Martin A. Green Mark J. Keevers Ian Thomas John B. Lasich Keith Emery Richard R. King 《Progress in Photovoltaics: Research and Applications》2015,23(6):685-691
Increasing sunlight conversion efficiency is a key driver for on‐going solar electricity cost reduction. For photovoltaic conversion, the approach most successful in increasing conversion efficiency is to split sunlight into spectral bands and direct each band to a dedicated solar cell of an appropriate energy bandgap to convert this band efficiently. In this work, we demonstrate conversion of sunlight to electricity in a solar collector with an efficiency value above 40% for the first time, using a small 287‐cm2 aperture area test stand, notably equipped with commercial concentrator solar cells. We use optical band‐pass filtering to capture energy that is normally wasted by commercial GaInP/GaInAs/Ge triple junction cells and convert this normally wasted energy using a separate Si cell with higher efficiency than physically possible in the original device. The 287‐cm2 aperture area sunlight‐concentrating converter demonstrating this independently confirmed efficiency is a prototype for a large photovoltaic power tower system, where sunlight is reflected from a field of sun‐tracking heliostats to a dense photovoltaic array mounted on a central tower. In such systems, improved efficiency not only reduces costs by increasing energy output for a given investment in heliostats and towers but also reduces unwanted heat generation at the central tower. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
14.
H. Ohtsuka M. Sakamoto K. Tsutsui Y. Yazawa 《Progress in Photovoltaics: Research and Applications》2000,8(4):385-390
We introduced a triode structure with p–n junctions on both sides into single‐crystalline bifacial silicon solar cells in order to improve solar cell performance. These fabricated bifacial silicon solar cells have an energy conversion efficiency of 21·3% under front 1 sun illumination (the standard 1 kW/m2 AM 1·5 global spectrum at 25°C) and 19·8% under rear 1 sun illumination tested at the Japan Quality Assurance Organization. The total of the front and rear conversion efficiencies is the highest ever reported for bifacial silicon solar cells. Copyright © 2000 John Wiley & Sons, Ltd. 相似文献
15.
为了提高太阳光伏发电系统的转换效率,对太阳进行自动跟踪是很有必要的。设计一种基于AT89C51单片机的太阳自动跟踪系统。采用程序控制,利用光学传感器对太阳能板做自动定位和误差校正,而通过单片机控制步进电机来实现系统。理论分析和设计结果表明,系统实现了对太阳的自动跟踪,能大大提高太阳能的利用率。该系统价格低廉、性能可靠,具有较高的实用价值。 相似文献
16.
17.
《Mechatronics》2015
The field-programmable gate array (FPGA) based intelligent sun tracking system proposed in this paper uses an NI 9642 controller to integrate the dual-axis sun tracking system with a Maximum Power Point Tracker (MPPT), so as to effectively increase the output power of solar panels. Furthermore, it is provided with multiple intelligent functions, so that the system can start up the sun tracking function automatically in the daytime, and automatically return to its initial position at night. It has a delay function to reduce the electric power consumed by the motor in rotation. Moreover, it can be switched to dual-axis or one-axis sun tracking freely as required by the user, and the solar panel inclination can be operated directly. The dual-axis sun tracking system uses the Particle Swarm Optimization (PSO) method to look for the parameters of the PI controller. The Taguchi Method and Logistic Map are proposed to enhance the steady state convergence of PSO in seeking the optimal solution. The MPPT uses Fuzzy Logic to adjust the step length of the incremental conductance method, so as to remedy the defects in the traditional fixed step method, and to make the solar panel output reach the maximum power point position rapidly and stably. 相似文献
18.