一种多链MCMC电力系统光伏出力预测模型及其算例分析

为了提高电力系统光伏出力预测精度,论文建立了一种应用多链马尔科夫-蒙特卡洛(MCMC)算法的预测模型,并展开算例分析.研究结果表明:通过多链算法生成的序列概率密度度达到了和历史序列非常接近程度,有效反映了对历史序列实施统计的情况.在光伏电站达到较高的相关性时,采用多链算法计算出的预测序列均值和标准差比历史序列误差更小,...     

Solvent‐Assisted Low‐Temperature Crystallization of SnO2 Electron‐Transfer Layer for High‐Efficiency Planar Perovskite Solar Cells

A high‐quality polycrystalline SnO₂ electron‐transfer layer is synthesized through an in situ, low‐temperature, and unique butanol–water solvent‐assisted process. By choosing a mixture of butanol and water as a solvent, the crystallinity is enhanced and the crystallization temperature is lowered to 130 °C, making the process fully compatible with flexible plastic substrates. The best solar cells fabricated using these layers achieve an efficiency of 20.52% (average 19.02%) which is among the best in the class of planar n–i–p‐type perovskite (MAPbI₃) solar cells. The strongly reduced crystallization temperature of the materials allows their use on a flexible substrate, with a resulting device efficiency of 18%.     

FY-2C卫星太阳电池阵在轨性能分析

风云二号气象卫星(C星)在轨工作近六年,该卫星电源系统采用BSFR太阳电池阵,这是空间电源工程首次在地球静止轨道上应用。母线电流遥测数据分析表明,太阳电池阵在同步轨道四年衰降约11%。     

New Linkage with Linear Actuator for Tracking PV Systems with Large Angular Stroke

This paper focuses on the development of an optimized photovoltaic tracking system involving low-cost, relative simple mechanisms, with linear actuators able to insure strokes comparable with those resulted when using gear rotary actuators. Starting with a rhombus linkage, with a linear actuator on the diagonal used for the elevation motion till 90°, a new performance solution is generated. This new linkage allows large angular strokes by using an asymmetric rhombus and an eccentrically positioned linear ac...     

民用建筑物与太阳能热水器的有机结合

简述了太阳能热水器与建筑的有机结合.其独特的可识别性都是有吸引力的.更为重要的是,这种一体化的设计所代表的是一种新生事物,其前途和生命力都是无可限量的.     

Electrochemical analysis of dye adsorption on aligned carbon nanofiber arrays coated with TiO2 nanoneedles for dye-sensitized solar cell

An electrochemical method has been developed to analyze dye absorption on the aligned carbon nanofiber arrays coated with TiO2 nanoneedles for dyesensitized solar cell. The unique nanostructure with the roughness factor of 90.6 provides a large effective surface area for dye adsorption. The experimental results showed that the dye molecules cover 39.7% of the TiO2 surface area which influences the performance of dye-sensitized solar cell. The electrochemical method provides the information of the coverage of dye molecules which is a key issue to optimize solar cell performance.     

Rare earth organic complexes as down-shifters to improve Si-based solar cell efficiency

This work reports on the optical and electrical characterization of crystalline silicon based solar modules encapsulated with ethylene-vinyl-acetate layers (that is the encapsulating matrix used nowadays by the photovoltaic industry) doped with a single europium complex whose sensitized region is broadened due to the presence of a co-ligand. Such europium doped EVA layers are able to realize down-shifting of photons with wavelength lower than 460 nm without introducing modifications of the industrial process leading to the fabrication of the photovoltaic modules. This effect has been proven under Air Mass 1.5 conditions (simulating terrestrial applications), where a 2.9% relative increase of the total power delivered by the encapsulated modules has been observed, allowing a reduction in the watt-peak price.     

Experimental investigation on a parabolic trough solar collector for thermal power generation

Developing solar thermal power technology in an effective manner is a great challenge in China.In this paper an experiment platform of a parabolic trough solar collector system(PTCS) was developed for thermal power generation,and the performance of the PTCS was experimentally investigated with synthetic oil as the circulate heat transfer fluid(HTF).The solar collector's efficiency with the variation of the solar flux and the flow rate of the HTF was identified.The collector efficiency of the PTCS can be in ...     

A novel and simple model for estimating the hourly global solar radiation

This letter proposes a novel and simple method for estimating solar radiation, named the ‘three‐point method’. The three points used to form the model are sunrise, sunset, and the maximum radiation point. The issue of obtaining maximum radiation is performed with the weighting evaluation of the HOTTEL and ASHRAE models. The feasibility and effectiveness of the proposed model is shown by simulation results. This model is equally applicable in any part of the world with a reassessment of the weighting factors for the maximum radiation. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

基于太阳能输出电压的跟踪方法研究

研究一种车载太阳能的自动跟踪方法。该方法以太阳能输出电压为细跟踪参数,以光敏管组成的比较电路输出电平为粗跟踪参数,并针对太阳能最大输出电压随车载电器负荷变化及天气状态变化的问题,对给定目标值采取了实时调节策略。由于跟踪参数直接取自于太阳能输出电压,因而较好地反映出了太阳能的实际跟踪状态。实验表明,即使车载电器负荷变化及天气状态变化,上述方法均能较好地满足太阳能的动态跟踪要求。