三峡水电站坝后钢衬钢筋混凝土压力背管的非线性有限元分析

采用钢筋混凝土非线性有限元方法，对三峡水电站钢衬钢筋混凝压力管道结构进行了计算，求得了各种钢材配置下的荷载效应并进行了相应的分析。     

黄河天桥水电站工程建设及泥沙处理主要经验

天桥水电站是黄河中游北干上的第一座高泥沙、低水头、大流量的径流式试验电站。它成功的施工与运营经验不仅对在黄河中游北干上开发梯级水电站，而且对中小型径流式水电站的施工都具有重要的借鉴作用。这篇文章总结了两期截流工程、基坑排水、固结灌浆、帷幕灌浆方面的施工经验。在诸如厂房位置的选择以及它的布置，泥沙、冰凌、洪水以及拦污方面的工程设计与运营的宝贵经验，使得水库长期保持高的有效库容和良好的运营状态。特剐是防止进水口淤积和水轮机的磨蚀方面的七条措施是非常有价值的。     

The determinants of cost efficiency of hydroelectric generating plants: A random frontier approach

This paper analyses the technical efficiency in the hydroelectric generating plants of a main Portuguese electricity enterprise EDP (Electricity of Portugal) between 1994 and 2004, investigating the role played by increase in competition and regulation. A random cost frontier method is adopted. A translog frontier model is used and the maximum likelihood estimation technique is employed to estimate the empirical model. We estimate the efficiency scores and decompose the exogenous variables into homogeneous and heterogeneous. It is concluded that production and capacity are heterogeneous, signifying that the hydroelectric generating plants are very distinct and therefore any energy policy should take into account this heterogeneity. It is also concluded that competition, rather than regulation, plays the key role in increasing hydroelectric plant efficiency.     

A review of the effects of water transfers in the La Grande Hydroelectric Complex (Québec,Canada)

Construction of the La Grande Complex in Eastern Canada called for complete or partial diversion of six rivers, the mean annual discharge of which varied from 60 to 1600 m³ s^?1, and the transfer of water from two adjoining watersheds (1586m³ s^?1) into La Grande Rivière. Three of these rivers with reduced flow, Eastmain (from 700 to 95m³ s^?1), Opinaca (from 260 to 35m³ s^?1), and Caniapiscau (from 1708 to 960m³ s^?1) and the waterways with increased flows, Boyd-Sakami (from 1 to 811m³ s^?1) and La Grande Rivière (from 1760 to 3400m³ s^?1) were intensively monitored from 1978 to 1988, while the others were surveyed sporadically. Very few modifications were observed, compared to previous conditions, in banks stability, water quality, and aquatic fauna of the affected rivers: those which appeared can be explained by the water level fluctuations, the water quality of the tributaries of the residual drainage basin, and/or by the direct influence of the reservoirs. In James Bay, the areal extent of the Eastmain River and La Grand Rivière plumes varied with discharge in an exponential relation, mostly under ice cover; resources from the coastal environment had not yet undergone any major changes. Because of the very small population dwelling in the area, less than 3000 inhabitants, modifications in the hydrological regime of these rivers did cause relatively few impacts, the main being greater banks instability in specific locations, reduction of the thickness and ice cover on La Grande Rivière, enhancement of navigation constraints on Eastmain River, and higher mercury levels in fish related to operation of the reservoirs.     

基于虚拟仪器的水电机组在线状态监测系统的研究*

随着水电机组状态检修的不断开展, 需要实现对机组的状态监测, 及时了解机组的运行情况并能及时处理。考虑到水电机组状态监测的多样性和复杂性, 结合实际, 提出水电机组在线状态监测的项目和基于PXI 总线仪器和LabVIEW 的具体实施方案。状态监测系统通过对水电机组状态量的采集、处理和分析, 来实现水电机组运行状态在线实时监测, 极大地提高了机组利用率。该系统在水电机组的状态检修中得到了实际应用。     

水电机组智能盘车系统关键技术探讨与实践

传统盘车方法存在布点数量小、停点不准确、读数主观性强、盘车耗时长等问题,因此迫切需要开发一种通用性强、效率高、精度高、智能性强的全自动智能盘车系统,本文对其相关关键技术进行了深入有效的探讨,在此基础上,提出了相应的解决方法与方案。通过现场试验,验证了所提出解决方案的有效性与可行性。     

泽城西安水电站混凝土面板堆石坝铜止水连续施工工艺

面板是混凝土面板堆石坝安全稳定的重要部位,铜止水制作和安装是面板防渗关键环节。在泽城西安水电站大坝面板施工过程中,采用自行设计的铜止水加工模具,结构简单、操作方便,实现了铜止水的连续加工成型,最大限度地减少了铜止水的焊缝,节约了施工成本,加快了施工进度,并提高了铜止水的施工质量。     

我国水轮机研究开发与制造技术的新进展

随着在先进设计与制造技术方面的研究开发及应用,在过去10年中,我国水轮机行业取得了巨大的技术进步.本文简单介绍我国在水轮机的水力研究开发与大型机组制造技术方面的最新进展情况.     

水电厂机械主设备运行可靠性研究

通过对水电厂的发电设备进行分类,分析了水电厂机械主设备故障发生的主要原因.然后利用可靠性的基本原理和技术手段,分析水电厂机械主设备的故障模式及其影响,总结出提高水电厂机械主设备运行可靠性的管理方法和维修体制.     

万家寨水电站水轮机防磨蚀措施及应用现状

介绍了万家寨水电站 1号水轮机、 2号水轮机在设计和制造过程中采用的抗磨蚀措施 ,对机组经过运行后 ,抗磨涂层尤其是耐而久涂层的应用现状及涂层破坏原因作了探讨