飞来峡水电站发电运行对英德市的影响分析

为安全起见，飞来峡水库库区回水计算所采用的流量为各河段(断面)的外包流量，这样的流量组成在实际情况下是不可能发生的。从库区河段的流量组成入手，计算分析了飞来峡水电站在发电运行过程中英德水位的安全富裕度。     

享堂水电站可供发电的水量及多年平均发电量分析

享堂水电站为一座引水式电站,由已建和扩建部分组成,扩建后电站单机装机容量与已建单机容量相差悬殊。电站发电水量受引水枢纽库区内海石水电站取水影响,同时还要保证减脱水河段生态基流量的下泄。针对这些问题,对享堂水电站可供发电的水量及多年平均发电量和年利用小时数进行了分析计算。     

水电站库区取水对发电影响分析

以水电站库区取水对发电影响分析为研究对象,从三种不同思路给出取水对下游发电损失量计算模式,并进行对比分析;以浙江省某小型河道水力枢纽库区内取水纠纷为案例,定量分析水电站库区取水对下游发电的影响,提出的分析方法可为类似的水事纠纷调解提供技术支持。     

浅析廖坊水电站厂房设计及施工

灯泡贯流式发电机组具有能源利用率高、适用水头范围广、发电流量大、结构紧凑等优点,是平原丘陵地区水电开发中常用的一种机型.本文通过介绍廖坊水电站厂房的结构设计和施工过程,对一些关键性问题进行了论述分析,研究成果可为今后泡灯贯流式机组发电厂房的设计与施工提供参考.     

浅谈水电站达不到设计能力的原因

水电站发电达不到设计能力的原因是多方面的。除水工建筑物设计不当、机型选择欠妥、施工和安装质量、配套不完善、电网结构不合理以及管理水平低下外,还有一个重要因素是水文分析计算、设计流量不合理所致。     

乐山大坪水电站投产发电

1月26日21时，由中国水电七局承担安装任务的乐山大坪水电站机组顺利结束72小时试运行，正式投产发电。乐山大坪水电站位于大渡河沙湾水电站库区沫溪河上，由中国水电集团四川电力开发有限公司投资建设，属Iv等电站工程，开发任务以发电为主，电站装设一台容量为6．2兆瓦的灯泡贯流式机组，设计利用净水头9．5米，引用流量73．03立方米／秒，年利用小时数7680小时，年发电量4762万千瓦时。     

低水头日周调节电站汛限水位动态控制方法研究

低水头日周调节水电站设置汛限水位的目的通常是为了降低库区回水高程,减少库区淹没损失,国内对该类电站的汛限水位动态控制研究甚少。因此,对国内外研究现状进行总结分析,推求一套适合低水头日周调节电站汛限水位动态控制的方法,研究成果对类似低水头日周调节电站具有借鉴与参考意义。本研究提出在保证满足电站库区防护对象防洪安全、工程本身安全和不增加下游防洪负担的前提下,根据水情预报信息,通过分析研究库区防护对象、机组发电、大坝防洪和下游防洪等因素对坝前水位的要求,综合推求出日周调节水电站按流量动态控制汛限水位成果,并结合工程实例,分析了研究成果的应用效果,最后对汛限水位动态控制的风险进行了分析。     

基于迭代动态初始解的水电站发电流量计算方法研究

水电站短期优化调度运用在出力推求发电流量时常采用迭代方法,而不恰当的迭代初始值会导致迭代计算次数大幅增加、计算效率低及迭代不收敛等问题。针对这些问题,本文通过对多个水电站实验数据的分析研究,提出了一种在实际工况条件下的机组发电流量隐函数形式。基于发电流量计算影响因素拟提出水电站机组发电流量迭代动态初始解函数式,将该函数计算值作为发电流量迭代计算的初始值。实例应用表明,该方法能够较地好提高计算效率,且方法简单有效,为水电站在短期优化调度中机组发电流量迭代计算提供了新方法。     

利用水位流量关系校核水电站发电流量

利用尾水渠断面水位与流量关系曲线,校核水电站发电流量。通过实例说明,只要在尾水渠断面建立稳宅单一水位流量关系,能保证发电流量的计算精度。     

凉山州人民政府组织的锦屏一级水电站库区综合调研工作顺利完成

为全面了解锦屏一级水电站库区移民、防洪安全、省政府封库令执行情况,确保锦屏一级水电站2012年首台机组按期发电。5月12日至20日,凉山州人民政府组织相关单位赴锦屏一级水电站施工区及库区所在地盐源、木里两县综合调研,现场重点调研了施工区库区周边区域是否存在防汛、治安安全隐患,查勘了盐源县古柏农场集中安置点、     

低水头水电站水轮机机型比选分析

雷公滩水电站属于低水头水电站,其水库仅具有日调节性能,因此,机组型式的选择及额定水头的确定将会直接影响到整个工程的投资规模和后期的经济效益。综合考虑该水电站处于交界水头的实际情况,通过对不同机型的投资、能量特性等方面展开分析,对不同额定水头方案下水轮机的运行稳定性、经济效益等方面的参数进行比较,最后确定雷公滩水电站采用灯泡贯流式机组,额定水头选取为14.53 m。     

浅析高水头多沙河流水电站水轮机的设计

针对高水头多沙河流水电站水轮机的特点,从转轮选型、结构改进、转轮材质选用、叶片加工工艺诸方面,论述了提高高水头机组综合效率和可靠性、改善多沙河流水电站水轮机抗空蚀性能的技术措施.     

长江三峡水轮发电机组参数选择的几个问题及建议

长江三峡水电站是世界上在建的最大水电站。水轮机水头变幅大；汛期低水头运行；枯期高水头运行时间长；对水轮机性能要求高，水轮发电机组参数选择难度大。根据三峡电站的特点建议：（１）、尽可能选择较大直径的水轮机，增大低水头过流能力，汛期多发电能；（２）、发电机应设一个８３０ＭＶＡ以上的最大容量，以扩大水轮机在高水头时的运行范围，提高稳定性；（３）、初期投入的６台机组使用初期转轮，库水位提高后更换永久转轮，     

Prediction of Hydropower Energy Using ANN for the Feasibility of Hydropower Plant Installation to an Existing Irrigation Dam

Recently, artificial neural networks (ANNs) have been used successfully for many engineering problems. This paper presents a practical way of predicting the hydropower energy potential using ANNs for the feasibility of adding a hydropower plant unit to an existing irrigation dam. Because the cost of energy has risen considerably in recent decades, addition of a suitable capacity hydropower plant (HPP) to the end of the pressure conduit of an existing irrigation dam may become economically feasible. First, a computer program to realistically calculate all local, frictional, and total head losses (THL) throughout any pressure conduit in detail is coded, whose end-product enables determination of the C coefficient of the highly significant model for total losses as: THL = C·Q ². Next, a computer program to determine the hydroelectric energies produced at monthly periods, the present worth (PW) of their monetary gains, and the annual average energy by a HPP is coded, which utilizes this simple but precise model for quantification of total energy losses from the inlet to the turbine. Inflows series, irrigation water requirements, evaporation rates, turbine running time ratios, and the C coefficient are the input data of this program. This model is applied to randomly chosen 10 irrigation dams in Turkey, and the selected input variables are gross head and reservoir capacity of the dams, recorded monthly inflows and irrigation releases for the prediction of hydropower energy. A single hidden-layered feed forward neural network using Levenberg–Marquardt algorithm is developed with a detailed analysis of model design of those factors affecting successful implementation of the model, which provides for a realistic prediction of the annual average hydroelectric energy from an irrigation dam in a quick-cut manner without the excessive operation studies needed conventionally. Estimation of the average annual energy with the help of this model should be useful for reconnaissance studies.     

Application of Integrated Hydrologic and River Basin Management Modeling for the Optimal Development of a Multi-Purpose Reservoir Project

Multi-purpose reservoir development have been always a big challenge for the management of water resources. This paper describes an integrated approach for investigating catchment hydrology in the development of a hydropower and a canal irrigation system based on model analyses. The investigation aims to adequately determine an optimal domestic and irrigation water resources allocation scheme based on an assessment of the reservoir water balance and capacity for hydropower. The soil and water assessment tool (SWAT) which characterizes basin hydrology and the water management and planning model MODSIM which provides a decision support system for water allocation optimization, were used in this study. The integrated approach was applied to Prek Te River basin in Cambodia. The water demand aspect was examined based on domestic water use, irrigation water, environmental flow, and water losses. An operational rule curve was developed for hydropower operation with respect to a power potential of 13 MW. Hydrologic modeling revealed 90 % dependable water of about 2.7 m³/s during the dry season and 214.3 m³/s during the wet season, indicative of a wet-season dependent reservoir for storage. Results from the 26-years simulation period also showed that diversions for domestic water and irrigation water supply were 92.3 % dependable for a 13 MW capacity hydropower development. The integrated approach was shown to be a valuable decision support tool for water resources management with the determination of an optimum policy for multi-purpose reservoir operation based on available basin water supply.     

小湾水电站水轮机主要参数和结构型式选择

小湾水电站水轮机单机容量(714MW)大,是当今世界上该水头段(最大水头251m)单机容量最大,转速最高的水轮机,且水头变幅大,因此其设计、制造难度都非常大。而水轮机参数选择的先进性和合理性,结构设计的可靠性和适用性等都是决定水轮机能否安全稳定运行的重要因素。针对小湾水电站水轮机主要性能参数和结构型式进行了分析研究、概括和总结,可供借鉴和参考。     

广西贺州市中小型水电站挖潜增容技改措施

针对广西贺州市中小型水电站存在调节性能差、老电站机组机型落后、发电利用小时数大,弃水多等问题,提出兴建日调节水库,提高径流式电站调节能力;安设橡胶坝或翻板闸抬高水头,提高机组出力;增容改造,减少弃水等措施,增加发电效益,并以实例加以介绍.     

丰满水电站重建工程大坝施工导流设计

丰满水电站重建工程为在原大坝下游120 m处新建一座大坝,在施工导流设计上充分利用了原有建筑物,将老坝作为新建工程施工的上游围堰,左岸三期厂房机组作为导流泄水通道之一,同时利用原有水库的调蓄能力汛期按汛限水位正常运行,并考虑洪水预报成果,进行库水位调蓄控制。在综合考虑上述因素的基础上,结合施工导流的特点,对导流方案、导流标准进行了比选,并对导流建筑物进行了设计。     

基于和硕县清水河水能开发利用规划

清水河中、下游段水能资源理论蕴藏量16.32 MW,其中,中游河段水能理论蕴藏量约为9.25 MW,占56.7％;下游河段水能理论蕴藏量为7.06 MW,占43.3％.依据水头及实际地形条件,中游河段布置两级电站.此梯级位于拟建伯斯阿木水库坝址下游直线距离约3.5 km处,根据1/5万地形图分析,采用引水式开发布置,建发电引水隧洞.参考已建并运行多年的若羌河梯级电站,针对清水河中、下游水能开发利用进行探索.     

齐热哈塔尔水电站水轮机选型及结构设计

针对高水头电站水轮机特点,从水轮机选型、主要过流部件结构、材料选择等方面优化设计,提高电站运行的稳定性和可靠性.