灯泡贯流机组动水重锤关机试验设计与实施研究

重锤是灯泡贯流机组在调速器发生故障无法工作或者压力油罐失压时,通过其重力关闭水轮机导叶的最后手段,动水重锤关机试验主要是验证重锤在机组运行状态下能否安全、可靠的关闭导叶,从而使机组停机.该试验既要确保试验的有效性,也要保证电站设备的安全,特别对于水轮发电机组、调速器、监控等系统的试验方案,予以实施,取得了较理想的试验结...     

抽水蓄能导叶铸造工艺攻关

抽水蓄能导叶与混流导叶相比,结构特殊,瓣体短而薄,长短轴直径均较大,铸件要求全部进行无损探伤,UT执行ASTM609二级,MT执行CCH70—3三级。我公司以往生产的抽水蓄能导叶（例如：白莲     

一起水电站甩负荷超压事件分析及建议

通过对一起水电站超压事件分析,得出了导叶在不同分段关闭规律下对机组调节保证计算参数的影响,针对甩负荷时导叶关闭时间较短的机组,提出了两点建议。     

呼和浩特蓄电站首台机组正式投产发电

<正>2014年11月,由中国东方电气集团有限公司所属企业东方电机主包生产制造的呼和浩特抽水蓄能电站首台机组顺利完成试运行,正式实现投产发电。机组各部位的振动摆度数据均满足合同要求,机组稳定性和可靠性在运行期间得到了进一步验证。呼和浩特抽水蓄能电站是内蒙古首座抽水蓄能电站。该电站总装机容量120万kW,安装的4台30万kW的立轴单级可逆轮流式水泵水轮发电机组均由东方电机生产制造。该电站机组自9月水泵工况并网成功,到11月机组完成考核试运行,历时43 d,创造了国内抽水蓄能机组调     

我国抽水蓄能电站核心技术获突破

<正>近日,经过国网新源控股有限公司的独立自主整组调试,我国自主研制的首台百兆瓦级抽水蓄能机组静止起动变频器(SFC)在响水涧抽水蓄能电站成功启动,拖动4台机组抽水调相并网一次性成功,标志着我国百兆瓦级抽水蓄能机组静止起动变频器的研制和调试技术都取得了突破性进展。静止起动变频器是抽水蓄能电站的核心控制设备,负责将抽水蓄能机组由静止状态拖拽至抽水调相运行,其研制、调试技术和市场长期被少数国外企业垄断,导致设备成本昂贵、运行维护费用高。国家电网公司为实现百兆瓦级抽水蓄能机组起动变频器关键技术突破,彻底打破国外企业垄断,于2013年立项百兆瓦级抽水蓄能机组SFC关键技术研究科技项目,由国网新源公     

我国已具备独立研制大型抽水蓄能机组能力 各项运行指标均达到国际先进水平

正【本刊讯】我国抽水蓄能机组技术开发起步较晚,与世界先进水平相比有较大差距,导致建成的大型抽水蓄能电站机组严重依赖进口。哈电集团所属哈尔滨电机厂有限责任公司瞄准技术难点,组织内部研发力量开展响水涧抽水蓄能机组关键技术研究及相关设备研制项目研究,完成水泵水轮机总体设计,突破水泵水轮机系列关键核心技术,并开发出性能优良的HLNA999转轮;自主开发了抽水蓄能机组控制     

可逆式水轮机变工况研究

针对抽水蓄能电站稳定性的要求,利用可逆式水轮机水泵工况断电过程中蜗壳出水边的压力始终保持恒定（水轮机工况的水头）,机组转速连续变化这一规律,根据转速的不同来选取不同的工况点。在Fluent软件中,通过变换转轮的边界条件设置,可模拟可逆式水轮机水泵断电过程不同工况点水力变化,计算时采用雷诺时均方程和RNG肛￡湍流模型,压力和速度耦合采用半隐式（SIMPLEC）算法。对可逆式水轮机不同工况点模拟结果进行了分析总结,数值试验结果直观地反映了可逆式水轮机水泵工况断电的不同工况点、叶片表面的压力分布、蜗壳内部的流场漩涡分布、水力损失等,对可逆式水轮机的转轮设计和结构优化有一定的应用价值。     

基于削峰填谷模型的抽水蓄能机组检修资源规划

为保障抽水蓄能机组检修工作高效开展，避免检修过程中产生资源冲突，提升检修效率，本文提出一种基于削峰填谷资源优化模型的抽水蓄能机组检修资源规划方法。通过统计分析抽蓄机组不同检修级别下的资源分布，寻找不同检修工序与检修项目的资源分布规律，绘制机组检修规划全过程网络分布图，根据机组结构特点计算不同时段各项目的时间参数，求解全过程工期内最大资源需求节点，调整非关键工序的工期，优先关键项目资源分配，实现检修工期内的资源均衡，进一步实现机组检修资源优化配置。通过在某抽蓄电站2台次机组A级检修工程上的应用，现场验证了该方法的可行性与应用价值。     

我国规划建设4座抽水蓄能电站

目前,我国正在建设和规划建设的抽水蓄能电站共有4座:一是江苏省溧阳市天国湖沙河抽水蓄能电站将安装2台抽水蓄能机组,每台5万kW,共10万kW,已于今年三季度开工建设,建设工期为3年;二是江苏省吴县纯阳坞抽水蓄能电站,将安装2台抽水蓄能机组,每台     

广州蓄能水电厂B厂机组导叶轴套密封漏水故障分析与处理

以广州蓄能水电厂B厂机组为例,介绍导水机构中导叶轴套及轴套密封的结构构成,对导叶轴套密封漏水故障进行分析,找到了故障的具体原因,并实施了相应的处理和预防措施。     

水轮机导叶端面间隙的控制

水轮机的导叶端面间隙对整个水轮发电机组的效率指标及安全稳定运行有着重要影响。通过理论分析和实际应用,总结了在水轮机设计、制造过程中对导叶端面间隙的控制措施。     

勐弄河二级水电站水轮机设计结构特点

根据云南勐弄河二级电站高水头、转速高的特点,电站的水轮机设计在转轮、叶片、导叶等进行针对性的结构改进,以便于相似电站设计时提供参考,电站的顺利运行证明其结构是合理可行的。     

预开导叶下水泵水轮机S特性及其压力脉动分析

可逆式水泵水轮机兼具了发电以及储能的特点既满足人们环保意识的需求也满足对功率的平衡与控制。但水泵水轮机在S特性区内运行会发生机组并网困难或者甩负荷过程中水压异常上升,使机组振动加剧。为探究预开启导叶的方法对水泵水轮机S特性的改善,对水泵水轮机模型分别在同步导叶和不同预开启导叶条件下进行能量试验及全流道内流场的(Computational fluid dynamics,CFD)数值计算;通过试验数据与计算结果的对比分析预开导叶后水泵水轮机S特性及其压力脉动特征。CFD计算结果及模型试验数据表明,预开导叶的方法能有效解决水泵水轮机S特性问题,但是预开导叶后,飞逸工况下的单位流量变大,造成转轮内的流动轴对称特性较差,导致机组的脉动加大,尾水管压力脉动幅值较大,运行稳定性较差,所以通过预开导叶的方法来改善S特性仍然存在弊端。     

基于电蓄热与抽水蓄能的风电消纳协调控制策略（英文）

为解决"三北"地区冬季供热期由于热电机组"以热定电"运行约束而导致的严重弃风问题,该文在研究电热负荷与风电出力分布特性以及不同时间尺度风功率波动特性的基础上,提出了基于电蓄热与抽水蓄能的两级协调控制策略。第一级协调控制以系统运行成本最小和风电利用率最大为目标,根据电热负荷和风电预测出力,通过电蓄热与抽水蓄能在调节容量上的优化配置,提高系统运行经济性和风电消纳率;第二级协调控制针对风电出力的实时波动,根据风电计划上网偏差,通过电蓄热与抽水蓄能的协调控制,平抑风电实时波动,提高风电消纳水平。结合甘肃酒泉实际运行的风电场站,所提出的协调控制策略的有效性得到验证。     

Hydraulic design and performance analysis on a small pump-turbine system for ocean renewable energy storage system

Korea has a myriad of islands in the south western coast that extensively rely on diesel generators for power production, which increase cost and environment pollution. The small hydro pump-turbine system for ocean renewable energy storage system is a kind of hybrid system that can reduce the usage of diesel generators and help to contribute to the environment in a positive manner by helping to reduce carbon emissions. The study focuses on initial hydraulic design and numerical analysis of a 30 kW-class pump-turbine system for energy independent islands in South Korea. The purpose of the study is to propose an ocean renewable energy storage system using a small pump-turbine system working with seawater. A 30 kW-class pump-turbine does not require a large head; approximately 30 m is sufficient for the design and application. Several other renewable energy systems like wind turbines, tidal turbines, wave energy converters and solar energy could be used to make a hybrid system with pump-turbine. The initial design achieved more than 85 % efficiency in both pump and turbine modes. However, further optimizations of the impeller blade shape and number of guide vane and stay vanes could improve the overall efficiency of the system.     

基于MATLAB的制动防抱死自调节门限值控制

为了在制动防抱死仿真研究中取得良好的控制效果,逻辑门限值控制方法中的最佳门限值会随着车速和路面附着系数的情况变化而变化。以研究自调节门限值的控制方式为目的,在MATLAB软件中创建了双轮三自由度车辆模型以及有效的逻辑门限值控制策略。在不同车速及不同附着系数的路面进行了仿真试验,并且选取车轮滑移率和车轮速2个重要参数进行考察,通过对最佳滑移率持续时间以及车轮的转动稳定性分析,验证了该自调节门限值控制的有效性。     

Three-dimensional flow simulation of transient power interruption process of a prototype pump-turbine at pump mode

The transient power failure process of a prototype pump-turbine was studied numerically by three-dimensional (3-D) simulations. Fluid coupling and dynamic mesh (DM) method were used to calculate the rotational speed of the runner. Simulations were performed based on turbulence model. Specific transient characteristics, such as the flow rate, head, rotational speed, were analyzed. The pumpturbine had a minimum head and a maximum axial force when the flow rate was 0 during the transient process. Pressure fluctuations increased when the pump-turbine ran at pump braking mode. Reverse flow in the casing as well as stall phenomenon in the runner had a great effect on the change of head. Pressure in the runner was greatly reduced when the pump-turbine ran at pump braking mode. The computational method could be used to interpret the abnormal phenomenon by the analysis of flow mechanism during a transient process.     

Analysis of transient flow in a pump-turbine during the load rejection process

The transient flow in pump-turbines during the load rejection process is very complex. However, few studies have been conducted on three-dimensional (3-D) numerical simulation. Hence, we simulated 3-D transient turbulent flow in a pump-turbine during the load rejection process using the calculation method of coupling the flow with the rotor motion of rigid body. To simulate the unsteady boundary conditions, the dynamic closing process of the guide vanes was simulated with the dynamic mesh technology. The boundary conditions at the spiral-casing inlet and the draft tube outlet were determined using the user defined functions (UDF) according to the experimental data. The numerical results of the rotational speeds show a good agreement with the experimental data. Then, the complex transient flow in the pump-turbine during the load rejection process was analyzed based on the numerical results. The results show that there are severe unsteady vortex flows in the vaneless space near the conditions under which the hydraulic torque on the runner equals to zero. When the pump-turbine operates into the maximum reverse discharge condition in the reverse pump operating process, the unsteady vortex flows in the vaneless space are instantaneously impacted into the region between the guide vanes and the stay vanes by the sudden reverse flows. The formation and development mechanism of the unsteady vortex flow in the vaneless space is associated with the distribution characteristic of the velocity field.     

管路分离机构闭合过程插头的动态数值模拟研究

为研究插头滑块在闭合时滑块的运动对管路分离机构内部流场的影响,以及介质如何阻碍滑块闭合的问题,采用动网格技术对插头滑块的关闭过程进行数值分析;为了体现其流域动态与插头滑块实际工作时的一致性,采用UDF程序来控制流体网格节点的最大位移,以达到可以实时控制滑块的运动;通过研究插头滑块在闭合过程中管路分离机构内部流场的压力分...