共查询到20条相似文献,搜索用时 46 毫秒
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光控太阳能路灯的设计 总被引:1,自引:0,他引:1
近年来,随着太阳能发电产业的迅速发展,光伏应用的领域正在逐渐扩大,各种光伏新产品不断涌现。在照明灯具中,作为技术和艺术相结合的太阳能路灯,已开始在很多地区推广应用。太阳能路灯具有很多优点:安全可靠,维护方便;不需要常规能源,不污染环境;可以根据需要随处安装,不用连接公共电网,因此安装时不必挖掘路面或草地,无须开沟埋设电缆。需要时还可以移动位置,重新安装到另外的地点,灵活方便。太阳能路灯通常由光伏方阵、蓄电池、控制器和灯具(包括控制箱、灯杆等支撑部件)所组成,一般有定时和光控两种。尤其是光控太阳能… 相似文献
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在系统设计配置和放电控制管理中,建立以蓄电池为中心的理念,对整个系统优化设计,有效管理、选择适合的蓄电池类型,更利于提高系统的可靠性,降低造价和维护成本。 相似文献
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基于升压型移相全桥ZVZCS DC/DC交换器构建了蓄电池充电器系统,同时采用一种自适应爬山法实现对太阳电池最大功率点的跟踪。在对主电路进行仿真分析的基础上,给出了具体电路和实际调试波形。对比仿真和实验结果,验证了基于软开关技术应用于光伏发电用DC/DC变换器中的可行性。 相似文献
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The solar lantern (manufactured by BHEL) could regularly be lit for 5–6 h up to a maximum of 7 h, if the battery was fully charged. It is desirable, for regular use, that the solar lantern should be lit for not more than 5 h a day if the clear sky condition exists. If the weather is partially cloudy, use of the lantern should be reduced accordingly. A performance study of the amorphous silicon (a-Si) module shows that the maximum power transfer voltage (Vmp) and corresponding current is ca. 65 and 75% of the open circuit voltage (Voc) and short circuit current (Isc), respectively. Efficiency of the module is 3–4% under field conditions and is slightly greater for a higher ambient temperature. 相似文献
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《Energy Conversion, IEEE Transaction on》2004,19(4):663-670
Use of a mixed structure consisting of a radial basis function (RBF) network and pole-shifting feedback controller for power system stabilizer application is presented in this paper. The RBF network is used to identify the time-varying parameters of the power system. The RBF has a simple structure with a nonlinear hidden layer which constructs local approximations to nonlinear input-output mapping and a linear output layer. The network is capable of fast learning and represents a nonlinear autoregressive moving average model with exogeneous inputs (NARMAX). The NARMAX model is transformed into a linear ARMA model every sampling period and the pole-shift controller is used to calculate the control signal. This process of linearizing a nonlinear system is important because of the widespread industrial acceptance of linear feedback controllers, availability of theoretical and practical results about robustness, and closed-loop stability. Simulation studies carried out on a single-machine infinite bus power system verify the effectiveness of the above approach. 相似文献
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普通太阳能充放电控制器电路原理框图如图1,太阳能带放电自锁功能的充放电控制器电路原理框图如图2。经过两图比较可以知道,太阳能带放电自锁功能的充放电控制器电路只是在原来的基础上,增加了下限自锁电路和手动复位按钮。增加放电自锁功能的目的是不让蓄电池对负载进行小电流放电,使蓄电池不产生深度放电,从而更好地保护蓄电池。人们通过对铅酸蓄电池的研究后发现,这种蓄电池在工作过程中只要保持充电时不过充电、放电时不过放电,就能延长寿命,正常工作5年以上。上限电压就是蓄电池可以充电的最大电压,下限电压是蓄电池放电的… 相似文献
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Solar control with thermotropic layers 总被引:1,自引:0,他引:1
Innovative means to control the light and energy flux according to demand are desirable for transparent façades and façade elements. One possibility to achieve this is presented by switchable layers that change their optical properties, either actively or passively, according to different control parameters. In addition to inorganic coatings on glass, there are several organic thermotropic systems that can be integrated into façade glazing. Above a certain temperature, thermotropic layers change from a clear to a translucent, light-diffusing state, thus switching from a highly transmitting to a diffusely reflecting state. We shall describe the basic principles of these systems and present an overview of some of the existing prototype systems. Installation options will be discussed and the results of an application in a retrofitted building presented. 相似文献
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Research at the Laboratory of Meteorological Physics of the University of Dakar has been devoted for several years to the study of solarenergy utilization. An experimental solar motor has been operating since August 1962. This motor drives a pump lifting 8 to 10 liters water per minute from a depth of 13 meters. (Output 130 kg meters per MINUTE = 21 watt).
This experiment being successful, the construction of a more efficient pump was begun. It has a collector of 300 m2 (3228 ft2) capable of supplying (during 5 hours/day) about 40 m3/hour of water lifted from a depth of 8 to 10 m (10,000 gallons water per hr raised 27 to 33 ft). This quantity of water represents the approximate daily requirement of a community of 500 persons. This engine, which is very simple and sturdily built, necessitating no servicing, opens a new area in the utilization of solar energy in tropical countries. 相似文献