Learning curve analysis of concentrated photovoltaic systems

Price declines and volume growth of concentrated photovoltaic (CPV) systems are analysed using the learning curve methodology and compared with other forms of solar electricity generation. Logarithmic regression analysis determines a learning rate of 18% for CPV systems with 90% confidence of that rate being between 14 and 22%, which is higher than the learning rates of other solar generation systems (11% for CSP and 12 to 14% for PV). Current CPV system prices are competitive with PV and CSP, which, when combined with the higher learning rate, indicates that CPV is likely to further improve its marketability. A target price of 1 $/W in 2020 could be achieved with a compound growth rate of 67% for the total deployed volume between 2014 and 2020, which would realize a cumulative deployed volume of 7900 MW. Other projections of deployment volumes from commercial sources are converted using the learning rate into future price scenarios, resulting in predicted prices in the range of 1.1 to 1.3 $/W in 2020. © 2014 The Authors. Progress in Photovoltaics: Research and Applications published by John Wiley & Sons Ltd.     

加强客户端用电安全管理的分析

随着电力体制改革的深化,供电企业与电力客户之间的产权界定有了新的划分,客户端用电不安全事件时有发生,对电网安全运行造成影响。对客户端用电管理进行了调查分析,提出了建立供、用、管“三位一体”的客户端电气安全管理机制,从根本上解决客户端电气安全管理中存在的问题,理顺电气安全管理秩序。     

SMT生产过程中有关问题的探讨

表面贴装技术(SMT)在电子产品组装过程中正得到广泛应用,本文指出了SMT生产中存在的有关问题,分析了产生这些问题的原因,提出了解决问题的措施.     

考虑短期负荷影响的DeepESN电力市场实时电价预测研究

精准的电价预测有助于宏观调控的实施.但能源结构转型导致大规模可再生能源并网,因此会导致电价降低和产生波动,降低时序预测序列的相关性,加大实时电价的预测难度.针对这一问题,采用自相关函数和最大信息数计算电价自身和电价与电量关联性,为模型输入提供依据,并在此基础上应用具有深度储备池特性的深度回响网络进行实时电价预测.研究结...     

顺应电力体制改革,开展风险管理审计

叙述了电网公司系统在推行现代企业制度中内部审计的重要性,介绍了电网企业在电力供应、资金管理、工程及关联交易和内部控制等领域存在的经营风险,探讨了风险管理审计的作用和方法.     

Residential electricity consumption in Portugal: Findings from top-down and bottom-up models

An econometric study of the Portuguese residential electricity consumption is presented, with a focus on the influence of dwelling characteristics on consumption. The relationship between the dwelling and household characteristics on per capita residential electricity consumption is estimated at two different scales, involving two distinct databases: the first includes data at the municipality level for 2001, the second is the most recent Portuguese consumer expenditure survey that was collected in 2005 and 2006. The results of the analysis at both scales are consistent and indicate that household and dwelling characteristics have a significant influence on residential electricity consumption. Our results show that in Portugal the direct effect of income on electricity consumption is low and becomes smaller when more relevant control variables are included in the analysis. Future demand of electricity in Portugal will be significantly influenced by trends in socioeconomic factors as well as changes in the building stock. These trends should be taken in consideration in the formulation of policy measures to reduce electricity consumption.     

电力市场下AGC机组运行考核算法的研究

针对传统AGC机组运行考核算法的不足,在AGC投入时对机组的调节速率和调节精度进行实时的测定与计算,并且考虑了AGC机组的响应时间对调节速率的影响以及系统运行人员与机组责任的区分;对调节容量根据计划交易日的前日各电厂对AGC调节容量的申报值进行计算。根据各电厂的考评结果对次月参与考评发电厂的月度发电量计划进行调整,并给出计算的公式、流程图和算例,最后对本软件的实际应用情况进行了介绍。     

几种浅色复合导电粉性能比较

比较了国内几种浅色复合导电粉的导静电性能、白度、粒径分布以及导电粉在环氧涂料中的分散性及制备的漆膜导静电性能稳定性。     

35kV系统电压异常的判断处理方法

35kV电压异常处理是35kV电网常见的问题,归纳了35kV系统出现电压异常的原因及表现形式,提出了分析判断的“三要素”,给出了具体处理的流程框图,对提高调度处理35kV电压异常的水平具有一定意义。     

瓦斯发电输变电设备配套及安装

瓦斯发电、升压、并网的设备配套,能充分发挥发电机组的特点,符合矿井供电网络的安全技术要求。根据升压、并网合理地选择升压变压器和高压控制设备,按电气接地符合爆炸燃性气体环境的技术要求,合理地布置发电站的总体接地网络,按发电、升压、并网的技术要求,合理确定保护原则,技术经济合理地选用电缆和敷设方法,选择了分支和总体的计量方式。