首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 171 毫秒
1.
关于在华中电网公司实施ERP的思考   总被引:4,自引:1,他引:3  
对ERP应用的原则,理念和优势结合国电华中公司的实际进行了详细阐述,研究了在我国企业,特别是电力行业实施ERP的经验和不足,分析了在华中公司实施ERP的优点和困难,并为华中公司开展ERP提出了建议。  相似文献   

2.
在分析我国核电项目管理模式现状的基础上,提出了管理模式优化的基本原则,阐明了工程承包/咨询公司(AE公司)在模式优化中的地位和作用,设想了我国核电AE公司发展的途径。  相似文献   

3.
读书     
《国家电网》2012,(14):109-109
《公司的力量》 该书系统阐述了公司的起源、发展、演变和创新,以全球视角深刻分析了经济制度、思想文化、科技创造、社会生活乃至政治、军事等诸多因素与公司之间的相互影响和推动以公司为载体来观察市场经济发展规律,探索国家发展进步的路径,对当前我国市场经济备件下,公司如何发展壮大有重要启示  相似文献   

4.
万物互联时代背景下,电力系统数据传递量不断增长,为了提高区域售电公司数据处理的准确性和时效性,文章提出了一种基于边缘计算的数据处理架构。首先阐明了边缘计算的定义和节点的设计框架,介绍了目前边缘计算在电力系统中的一些应用场景。其次搭建了面向区域售电公司的边缘计算框架,分别就云平台和边缘节点的模型进行定义和分析,并针对综合框架信息交互的内容进行详细讨论,且设计了整体运行流程。最后建立了区域售电公司边缘计算任务分配模型,通过算例分析了边缘计算节点的信息传输性能和计算性能。结果表明所提架构相较于传统云计算方法具有优越性,为售电公司制定用电套餐的计算分析方式提供了一种新的思路。  相似文献   

5.
《电子测量技术》2005,(6):62-62
泰克公司收购了Vqual公司,Vqual公司是一家提供数字压缩媒体分析,测试和优化软件工具的业界领先供应商,总部位于英国布里斯托市。  相似文献   

6.
一、国内外真空灭弧室技术水平分析(一)国外真空灭弧室技术水平分析真空灭弧定的研制始于英国和美国,随后发展到日本。由于日本强制推行真空开关,因而发展很快、产量很大。原西德随后研制成功了3AF系列和3AG系列的真空开关。法国和瑞士只是八十年代初才开始大量使用真空开关。前苏联、波兰等国的真空断路器和真空接触器也很有名。目前,国外生产真空断路器的公司有60多家,其中主要的有12家,而且都有自己的真空灭弧室制造厂,它们是:Siemens公司、AEG公司、GE公司、东芝、三菱、明电舍、Wwstinghouse公司,ASEA公司、ABB公司…  相似文献   

7.
LCC管理技术在国外电力系统的研究与应用   总被引:1,自引:0,他引:1  
运用寿命周期成本(LCC)管理,是上海市电力公司企业发展的战略举措,通过对国际上主要国家进行LCC管理的公司进行追踪、搜索,以及前期咨询,收集并介绍了这些公司在LCC管理方面的主要工作、特点和经验;分析了国外各公司在LCC技术方面的最新进展,还介绍了这些公司针对上海电力系统开展LCC管理工作提出应注意的问题和若干建议。  相似文献   

8.
刘恩德 《国际电力》2005,9(5):60-62
从经济效益的角度分析美国堪萨斯市动力照明公司(KCP&L)实现变电站实时在线监测系统的情况,涉及巡查人工费、维修费、设备投资费用、人身事故保险费和停电赔偿费等。该公司通过实施在线实时监测系统,提高了公司的供电可靠性,增强了企业的竞争力,给公司带来巨大的经济效益。  相似文献   

9.
秦健 《西北电建》1999,(4):10-15
对公司从属的电力建筑业进行了行业特性分析,需求与供给分析,得出了在电力建筑产品供给曲线变化不大的情况下,需求曲线左移,将造成供需均衡价格下降的结论。在此情况下,公司应以维持市场占有率,应付和和防止竞争为定价目标,通过对影响市场定价的五种主要因素分析,提出公司产品需要降价的观点,并根据政府定价行为在一定时间内不可能完全消失,产品成本难以准确估算以及引起过度竞争的实际情况,提出采用适度低于同行现行价格的定价方法。  相似文献   

10.
为了降低费用和减少风险,对购电公司投标组合策略进行了初步探讨,确定购电公司在不同市场中的购电量。讨论了购电公司在合同市场和现货市场两市场的购电分配问题,通过对确定需求和随机总需求两种情况的分析和研究,得出了这两种情况下合同市场最优购电量的解析式。  相似文献   

11.
王峰  周挺  王成  黄福勇  曾鹏 《中国电力》2015,48(12):33-38
运行经验表明,风灾故障对电网安全运行的威胁日趋严重,但在抗风设计、改造中所采用的典型气象区域风速分级标准较为笼统,缺少相关数据,不能有效地指导架空输电线路抗风灾工作。研究了湖南电网风灾故障分布特征,对湖南近30年气象数据进行了统计和对相关标准进行了修正,采取极值I型分布概率模型完成了湖南电网30年、50年和100年重现期最大风速统计,提出了湖南电网风区分级标准,完成了湖南电网风区分布图的绘制,得到了湖南风速分布情况。在此基础上,给出了湖南电网风区分布图的应用原则和建议,可为架空输电线路抗风灾设计、改造提供依据,给电网防风灾提供技术支撑。  相似文献   

12.
数字化变电站系统结构   总被引:48,自引:0,他引:48  
张沛超  高翔 《电网技术》2006,30(24):73-77
阐述了数字化变电站的系统结构和设计原则,讨论了过程总线和变电站总线的基本组网方案,分别从功能冗余及网络容错等方面提出了多种具有高可靠性的数字化变电站系统结构,并从过程层和间隔层方面提出了常规设备的接入方案。  相似文献   

13.
电力系统输电线路接地距离保护整定计算研究   总被引:15,自引:6,他引:15  
文章主要推导和分析了接地距离保护与相邻线路接地距离,零序和纵联保护配合的计算方法和计算公式。尤其是详细推导有零序互感耦合线路相互配合的精确计算方法和公式,并提出了综合助增系数的新概念,文中公式推导祥尽准确,在不考虑零序互感影响时与相邻线路接地距离Ⅰ段配合的公式与整定规程完全相同。文中公式和结论已在整定计算程序设计或实际整定计算中采用。并有详尽的实际系统计算和分析。  相似文献   

14.
Emission of greenhouse gases and depletion of fossil fuel reserves are two key drivers, which are forcing the mankind to generate the future energy demand from the renewable energy resources. These resources are generally distributed in nature and are directly integrated at distribution levels. Increasing penetration of the distributed energy resources in distribution power networks creates additional operational and control issues. These are mostly regulatory, economical load dispatching, power quality and protection issues. Generally power distribution systems are protected with the help of dedicated over current based protection schemes. But increasing share of distributed energy resources penetration in electric utilities poses a serious threat to the existing protection coordination schemes of the distribution systems. Distributed energy resources connected distribution networks become interconnected in nature and protection coordination schemes, which are designed for unidirectional flow of fault currents become ineffective/non-functional. Therefore, new protection coordination schemes are required for providing the adequate protection coordination for distributed energy resources connected electric power networks. In the available literature, the protection coordination schemes for radial distribution systems and developments in the area of protection coordination are discussed in detail. A thorough review for all these protection coordination schemes for distribution systems with and without distributed energy resources is done in this review article. It includes the analytical and artificial intelligence based techniques application for coordination of protective relays in the distribution systems. The limitations and research gaps in the area of protection coordination schemes are also presented in this review article. The aim of this research paper is to bring all the available research in the area of relay coordination on one platform, so that it will help the emerging researcher to identify the future scope of relay coordination application for distributed energy resources connected distribution systems.  相似文献   

15.
风电机组的噪声辐射对环境有很大影响,国外很早就开始了相关的研究和检测,但是国内对此一直缺乏足够的重视。介绍了风电机组的噪声危害,分析了风电机组噪声的产生原因,列举了国外风电发达国家的风电机组噪声辐射标准,描述了国际通用的风电机组噪声检测方法。  相似文献   

16.
电力金融市场综述   总被引:30,自引:15,他引:30  
电力金融市场是电力现货市场发展的必然产物,它有利于发现电力真实的价格,促进电力市场公平竞争;并能为市场交易者提供风险管理工具,抑止现货电价飞升,有利于电力市场的稳定。电力金融市场的研究对于设计高效、合理的中国电力市场框架和电力交易机制有着重要的参考价值。文中在介绍各国电力金融市场的基础上对电力金融产品进行归类研究,包括电力期货和电力期权的分类。着重论述了电力金融市场的2个关键问题:电力期货的套期保值策略和电力期权的定价方法,推导了电力期货的动态和静态最优保值率公式和电力期权基于BlackScholes模型和MonteCarlo模拟的定价公式。通过对现有研究的分析和评论,最后提出了电力金融市场方面几个重要的研究领域。  相似文献   

17.
A number of different models for hydraulic turbines and for their speed controllers are presented. The models vary in complexity, and are meant to be used for the study of power system problems of different types. Hydraulic models suitable for a relatively wide range of studies are recommended. Models are provided for prime movers including water supply conduit and prime mover speed controls. Nonlinear models are required where speed and power changes are large, such as in islanding, load rejection, and system restoration studies. One of the objectives is to present the basic physics of hydraulic turbines and their controls recognizing that, in the state of the art, the development of a code for a particular model is routine once the physics are well defined  相似文献   

18.
高压直流输电系统因具有输送容量大、能耗低且能实现电力系统非同步互联等优势而得到广泛应用,其可靠性分析可为系统提供重要的运维及决策依据。因此,围绕现阶段国内外高压直流输电系统可靠性分析方法进行了归纳总结。首先阐述了传统直流输电、柔性直流输电系统的组成差异,并对输电系统常用的可靠性指标作了相应归纳。其次,从统计法、手册法、状态空间法及其他方法等层面出发,分别对高压直流输电系统可靠性建模的基本原理及研究现状进行了分析,对各类方法的优缺点进行了对比,并探讨了柔性直流输电系统在可靠性分析方面存在的新挑战。最后,针对当前研究中存在的不足,对高压直流输电系统可靠性分析方法进行讨论与展望。  相似文献   

19.
Emission of greenhouse gases and depletion of fossil fuel reserves are two key drivers, which are forcing the mankind to generate the future energy demand from the renewable energy resources. These resources are generally distributed in nature and are directly integrated at distribution levels. Increasing penetration of the distributed energy resources in distribution power networks creates additional operational and control issues. These are mostly regulatory, economical load dispatching, power quality and protection issues. Generally power distribution systems are protected with the help of dedicated over current based protection schemes. But increasing share of distributed energy resources penetration in electric utilities poses a serious threat to the existing protection coordination schemes of the distribution systems. Distributed energy resources connected distribution networks become interconnected in nature and protection coordination schemes, which are designed for unidirectional flow of fault currents become ineffective/non-functional. Therefore, new protection coordination schemes are required for providing the adequate protection coordination for distributed energy resources connected electric power networks. In the available literature, the protection coordination schemes for radial distribution systems and developments in the area of protection coordination are discussed in detail. A thorough review for all these protection coordination schemes for distribution systems with and without distributed energy resources is done in this review article. It includes the analytical and artificial intelligence based techniques application for coordination of protective relays in the distribution systems. The limitations and research gaps in the area of protection coordination schemes are also presented in this review article. The aim of this research paper is to bring all the available research in the area of relay coordination on one platform, so that it will help the emerging researcher to identify the future scope of relay coordination application for distributed energy resources connected distribution systems.  相似文献   

20.
Surface field integral equations are the basic tools for electromagnetic waves scattering calculations. They are of particular importance for the evaluation of the ocean or soil surface contributions to backscattering and emissivity in remote sensing applications based on the use of radars or microwave radiometers. The proofs of these fundamental integral equations are disseminated in the scientific literature, and the original references are old. This paper proposes a comprehensive derivation of these relationships for both perfectly conducting and dielectric bodies, starting from Maxwell equations, through Kottler's formulas. Several basic properties for discontinuities in vector surface integrals are required, and the derivations are included. Some original proofs are also provided.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号