Study on integrated development and hybrid operation mode of nuclear power plant and pumped-storage power station

The nuclear power plant is suitable for base-load operation, while the pumped-storage unit mainly gives play to capacity benefit in the electric power system;hence, the integrated development and hybrid operation mode of the two can better meet the needs of the electric power system. This article first presents an analysis of the necessity and superiority of such mode, then explains its meaning and analyzes the working routes. Finally, it proposes the business modes as follows: low price pumping water electricity plus nuclear power in the near term;nuclear power shifted to pumped storage power participating in market competition in the middle term;and, in the long term, nuclear power shifted to pumped storage power as primary and serving as an electric power system when needed.

Prospect of new pumped-storage power station

In this paper, a new type of pumped-storage power station with faster response speed, wider regulation range, and better stability is proposed. The operational flexible of the traditional pumped-storage power station can be improved with variable-speed pumped-storage tech no logy. Combined with chemical en ergy storage, the failure to achieve sec on d-order response speed and the insufficient safety and reliability of pumped-storage power units could be solved. With the better solar en ergy and site resources, the in teg rated performance can be improved by an optical storage system in stalled in future pumped-storage stations. Through the characteristics analysis of the new type of pumped-storage power station, three types of optimal station locations are proposed, namely, the load concentration area, new energy concentration area, and ultrahigh- voltage direct current receiver area. Taking the new pumped-storage power station as an example, the advantages of multi-energy cooperation and joint operation are analyzed. It can be predicted that the frequency and load regulation of the power grid will be more flexible, and the service capacity to the main power grid will be much stronger in the future.

仙居抽水蓄能电站地下厂房洞室群排水孔幕渗控效果分析

仙居抽水蓄能电站地下厂房洞室群结构复杂、排水孔数目众多,为分析排水孔幕的渗流控制效果,利用排水孔二次剖分技术,对工程区全部排水孔进行了精细模拟,采用三维渗流有限元法计算得到地下厂房洞室群围岩区的渗流场分布规律。结果表明,排水孔幕对电站地下厂房洞室群渗流场的分布起控制性作用,排水降压效果明显。

浙江仙居电站水泵水轮机模型验收试验及水力性能分析研究

仙居电站水泵水轮机组是国内在建和已建的单机容量最大的抽水蓄能机组。电站水头高、变幅大、对水泵水轮机转轮的研収设计提出了很高的要求。本文详细介绍了仙居水泵水轮机的模型验收试验及结果,重点分析了仙居水泵水轮机转轮的能量特性、空化特性、压力脉动特性以及"S"形水力兲键特性等主要水力性能指标。结果表明仙居水泵水轮机各项指标突出、综合性能优秀。

仙居抽水蓄能电站下水库调洪计算的特点

仙居抽水蓄能电站利用已建成的下岸水库作为下水库。下岸水库是一座以防洪、灌溉(供水)为主的综合利用工程。电站建设应不影响水库的原防洪功能,为此在下水库增设了一孔泄放洞以提高水库的泄流能力。按仙居抽水蓄能电站可行性研究阶段所确定的洪水调度原则进行调洪计算,成果表明,下水库台汛期各频率洪水位均低于下岸水库初步设计报告中同频率的相应洪水位,并且均不超过电站可行性研究阶段的复核成果,不会加大下岸水库下游的防洪压力,不影响下岸水库的防洪库容和总库容。

仙居抽水蓄能电站蜗壳混凝土施工仿真研究

浙江仙居抽水蓄能电站装配了大功率水轮发电机组,其蜗壳的大体积混凝土施工存在温度应力大并造成开裂的风险,影响机组正常运行。为探究蜗壳温度应力,对1#机组蜗壳混凝土进行了考虑施工过程的三维实时仿真计算,对关键位置进行了应力分析,提出施工期降低早期温度应力的建议措施。

仙居抽蓄电站上水库面板堆石坝安全监测设计及蓄水期成果分析

仙居抽水蓄能电站上水库主坝为面板堆石坝,最大坝高88.2 m,坝顶长度263.66 m,2015年6月蓄水并于2016年5月底达到正常蓄水位。对面板堆石坝的监测设计方案进行了系统介绍,对蓄水期的主要监测成果进行了初步分析,表明大坝变形、渗流、面板应变基本处于合理范围,大坝运行正常。

仙居抽水蓄能电站移民安置前期工作管理

系统回顾了仙居抽水蓄能电站建设征地移民安置前期工作,结合建设征地移民安置实施工作,思考水电工程尤其是抽水蓄能电站建设征地移民安置前期工作的体制与机制,总结仙居抽水蓄能电站建设征地移民安置前期工作的得失,对现行的水电工程移民安置前期工作管理提出建议。

仙居抽水蓄能电站地下厂房混凝土施工温度控制

仙居抽水蓄能电站安装4台单机容量为37.5 MW的立轴单级混流可逆式水轮发电机组,电站地下厂房长176 m,宽25 m,高51.5 m。其中厂房结构混凝土分为尾水管层、蜗壳层、水轮机层、中间层、发电机层,厂房混凝土施工具有工程量大、工期紧、施工强度高、工序多、高温季节施工等特点。对施工过程中采取的温度控制措施进行了阐述,保证了厂房混凝土温度控制满足设计要求,所取得的经验可为类似工程提供参考。

浙江仙居抽水蓄能电站780MPa级钢岔管制造质量控制

钢岔管的制造质量控制对保证岔管较好的性能起着至关重要的作用,本文概要介绍仙居抽水蓄能电站780MPa级钢岔管焊接工艺评定试验、坡口设计、瓦片成形、整体与装配、部件焊接、组合焊缝焊接残余应力测试与消除、整体正式装配、水压试验等环节的关键技术措施和质量控制要点,并根据相应的规范标准对各工程环节得到的质量进行了评价。