从2008年大洪水看南宁市防洪能力

文章对南宁市上游梯级水电站建成后的实际防洪能力,未来建成的左江龙头水库平而关水电站和南宁市老口水电站共同拦洪调度的防洪能力,以及老口青秀2座水电站的设计洪水流量,建筑物长度、宽度、高度及库区淹没赔偿款数额,邕江、浔江及左右江沿岸几百公里的土地开发高程和布局进行了探讨。     

Employment impacts of a ‘green’ energy transition in China

Before the US financial crisis that began in 2008, China was the ‘factory’ of the world, utilizing energy intensively for such processes as steelmaking, papermaking and concrete production. As such, energy emissions in China increased dramatically until 2007, with much of the energy being provided by the labor-intensive coal industry. Under the 11th five-year plan, China resolved to increase its energy efficiency, setting out to reduce energy consumption while continuing to increase economic growth, and to increase the usage of ‘green’ technologies to 15% of all energy used by 2020. The Renewable Energy Law of 2007 set a guideline for China's energy reduction goals, to quadruple the national GDP while only doubling the country's electricity usage by the year 2020. Currently, there are virtually no studies on the employment effects of a ‘green’ transition to explore what impact the current energy goals, or potentially ‘greener’ energy goals, would have on China's labor force. This paper seeks to analyze the effects on employment of a ‘green’ transition.     

低矮建筑周边的建筑对其平屋盖上风压的干扰分析

低矮建筑周边的建筑对其平屋盖上的风荷载存在气动干扰效应。为了有效分析该种干扰效应的发生规律,利用刚性模型表面测压风洞试验对平屋盖上的风压系数进行了测量。     

基于地区功率平衡的新能源最大接纳能力评估

新能源出力具有的随机波动性特点,使其不能像常规电源一样输出稳定可控的功率。大规模新能源并网必然会对电力系统的安全稳定运行带来挑战。随着新能源装机容量的快速增长,为了使新能源的建设速度与电网建设及负荷发展相适应,减少弃风弃光现象,对当前阶段的新能源接纳水平做出准确的评估显得尤为重要。以某省份实际运行情况为例,考虑了调峰、网架输送能力等制约新能源接纳能力的主要因素,提出了一种基于省内各地区功率平衡的最大新能源接纳能力评估方法,为各地区新能源的装机规模与建设时序提供参考。     

贵州山地地区风力发电技术发展探讨及展望

贵州属于典型的山地地区,风电场建设及运营具有很强的代表性.对贵州山地地区的风资源评估、风电场的建设,以及风电场的运营维护等方面展开研究,发现目前高海拔山地地区的风力发电技术存在突出的不稳定性和间歇性问题,贵州山地地形的风电场处于高海拔地区,风电场的发电量受季节和空气密度的影响明显.提出了利用储能技术和风力发电技术结合的方法来解决高海拔山地地形的风力发电技术的不稳定性和间歇性问题,这对山地地区风力发电技术发展和能源结构形式的调整具有重要意义.     

基于外部性与经营期电价的风电经济性研究

风电的外部影响主体主要包括环境、电网和用户。将外部成本和收益内部化是研究风电经济性的前提条件。考虑了风电的减排效益及对电网备用的影响,基于经营期电价,测算其在预期收益下合理的上网电价,并提出经济发电利用小时数概念,为研究风电投资可行性提供参考。结果表明,在综合考虑内外部成本和收益的前提下,在目前技术条件下,风电合理的上网电价与我国现行风电标杆电价一致,仍高于常规能源电价。结果证明了方法的有效性。     

现代物流系统规划在乘用车钢制车轮企业中的应用

先进的物流系统不但是经济繁荣的标志而且有助于帮助跨国企业整合全球资源,提升竞争能力,实现利润的最大化。作者就如何在乘用车钢制车轮企业中采用现代物流系统规划进行了尝试,描述了进行物流系统规划的一般步骤,最后举出一个实例。     

关注新兴能源，聚焦标准发展——风电变流器的安全标准发展

随着变流器在风电机组中的广泛应用,变流器的产品安全越来越受到重视。文章主要分析了欧洲、美国、中国目前变流器产品安全标准的发展现状,介绍了正在开发的变流器产品安全标准,并简单阐述了国内变流器标准化的重大意义。     

Spatial planning of offshore wind farms: A windfall to marine environmental protection?

Wind farms are often planned offshore where wind conditions are favourable and the visual impact is less important. Wind farms have both positive and negative effects on the marine environment. Negative effects include bird collisions, underwater sounds and electromagnetic fields, whilst positive effects constitute functioning as artificial reef and acting as no-take zones for fish, with possible spill-over effects.This paper presents a spatially explicit framework to analyze effects of wind farms on the marine environment and aims to evaluate how wind farms can contribute to protection of the marine environment through strategic and economically viable location choices.The functioning and the applicability of the model are demonstrated in a numerical example for the Dutch exclusive economic zone. We find that the careful spatial planning of wind farms is a key factor for profitability and environmental protection, and that, if carefully planned, the environment can benefit from offshore wind farms.     

关于风电项目招标方案的探讨

主要根据风电项目的特点,对现阶段招标项目存在的误区,对风电项目建设招标各阶段宜采取的方案和侧重点进行分析,以期使项目建设获得良好的效果。