Research on Monitoring and Earlywarning System of Marine Organisms for the Intake of Nuclear PowerPlants

An monitoring and earlywarning system is proposed for marine organisms and the cause of water intake blockage is analyzed. Based onthe intelligent sensing technology, computer software and hardware technology and digital signal processing technology, the buoy monitoring platformsystem is developed by internet of things technology, cloud computing and the application of large data. Remote realtime monitoring of aquatic organisms and foreign bodies is realized based on underwater acoustic detection and low light imaging technology. Data processing center is established to store, analyze and process monitoring information and display it in real time, and provide emergency decision support. Through development and test of relevant key equipments, the reliability of cold source system of nuclear power plants is improved, which effectively reduces theinfluence of marine biological invasion on security and economic operation of the units.

Research on H_2 speed governor for diesel engine of marine power station

The frequency stability of a marine power system is determined by the dynamic characteristic of the diesel engine speed regulation system in a marine power station. In order to reduce the effect of load disturbances and improve the dynamic precision of a diesel engine speed governor, a controller was designed for a diesel engine speed regulation system using H2 control theory. This transforms the specifications of the system into a standard H2 control problem. Firstly, the mathematical model of a diesel engine speed regulation system using an H2 speed governor is presented. To counter external disturbances and model uncertainty, the design of an H2 speed governor rests on the problem of mixed sensitivity. Computer simulation verified that the H2 speed governor improves the dynamic precision of a system and the ability to adapt to load disturbances, thus enhancing the frequency stability of marine power systems.

Technical development of operational in-situ marine monitoring and research on its key generic technologies in China

In China,operational in-situ marine monitoring is the primary means of directly obtaining hydrological,meteorological,and oceanographic environmental parameters across sea areas,and it is essential for applications such as forecast of marine environment,prevention and mitigation of disaster,exploitation of marine resources,marine environmental protection,and management of transportation safety.In this paper,we summarise the composition,development courses,and present operational status of three systems of operational in-situ marine monitoring,namely coastal marine automated network station,ocean data buoy and voluntary observing ship measuring and reporting system.Additionally,we discuss the technical development in these in-situ systems and achievements in the key generic technologies along with future development trends.

Seismic Deformation and Seismic Resistance Analysis of Shapai Roller Compacted Concrete Arch Dam Based on Field Monitoring and Dynamic Finite Element Method

Shapai Roller Compacted Concrete(RCC) Arch Dam is the highest RCC arch dam of the 20th century in the world with a maximum height of 132m,and it is the only concrete arch dam near the epicentre of Wenchuan earthquake on May 12th,2008.The seismic damage to the dam and the resistance of the dam has drawn great attention.This paper analyzed the response and resistance of the dam to the seismic wave using numerical simulations with comparison to the monitored data.The field investigation after the earthquake and analysis of insitu data record showed that there was only little variation in the opening size at the dam and foundation interface,transverse joints and inducing joints before and after the earthquake.The overall stability of the dam abutment resistance body was quite good except a little relaxation was observed.The results of the dynamic finite element method(FEM) showed that the sizes of the openings obtained from the numerical modeling are comparable with the monitored values,and the change of the opening size is in millimeter range.This study revealed that Shapai arch dam exhibited high seismic resistance and overload capacity in the Wenchuan earthquake event.The comparison of the monitored and simulated results showed that the numerical method applied in this paper well simulated the seismic response of the dam.The method could be useful in the future application on the safety evaluation of RCC dams.

Digital Weather Stations as a Part of Wind Power Station

This paper mainly studies Weather Stations part of the wind power station. The use of wind energy in practice is carried out using the facilities of the wind in which the kinetic energy of the windscreen flow is converted into mechanical energy wind speed, then electrical energy alternator. The effective operation of the wind turbine is dependent on the direction of the wind. Speed air density, which in turn depends on the temperature and humidity. Thus, the speed of the wind worked effectively in its composition must include the weather. Meteorological station also performs the role of prevention. When the sharp wind speed or increase wind speed above the maximum value, it sends a signal to the lock assembly wind to prevent wind turbine technology from damage. The work of the meteorological stations design as part of the Wind Energy Station is considered. The complex technical devices are used for its implementation. A set of technical means used to its implementation and designed system consists of a temperature, humidity, wind speed, wind direction and rain gauge sensors that are connected to PIC16f876A microcontroller.

Radioactivity level of the ambient environment of Anren bone-coal power station

The radioactivity level of the ambient environment of Anren Bone-coal Power Station (BCPS) was investigated systematically. The γ radiation dose rate level in the environment, the content of 238U and 226Ra in the ambient soil and the farmland in the direction of downwind, the concentrations of 238U. 232Th. 226Ra 40K and 222Rn as well as α potential energy in air, and the concentrations of natural U and Th in effluent are all higher than the corresponding values of the reference site. The additional annual effective dose equivalent to the residents living in the houses made of bone-coal cinder brick is 2.7 mSv.

Review of condition monitoring and fault diagnosis for marine power systems

The use of condition monitoring and fault diagnosis(CMFD)in marine power systems significantly influences ship safety.This study divides the development of CMFD for marine power systems into three periods and reviews the content,state and limitations of CMFD research for each period.According to the research achievements and engineering experience of the authors’team,typical application cases are introduced for CMFD in ships,including CMFD platforms on engineering ships,salvage ships,container ships and ro-ro ships powered by solar photovoltaic systems.Finally,prospective research directions are proposed for CMFD in marine power systems,considering the research status of CMFD and the trend toward intelligent and eco-friendly ships.

基于PowerLogic系统构架的船舶自动化电站监控系统

为了有效地管理和监控船舶电站的工作状态,提高电站的稳定性和可靠性,采用施耐德PowerLogic系统构架组建船舶电站监控系统,实现船舶电站监管控一体化.设计触摸屏监视界面、电能质量分析界面和Web远程监视界面,并设计监控系统的控制电路.整个监控系统的以太网与现场总线通信程序采用PLC实现.在交流380 V/50 Hz船舶电站上的实际运行表明,该监控系统在船舶电力参数监视、控制和管理方面效果显著,为实现配电室的无人值守和提高船舶电站现代化管理水平奠定基础.

铅基反应堆海洋核动力发展研究

铅基反应堆(铅基堆)核动力具有固有安全、小型轻量、长寿高效等突出优点,在先进海洋装备、无人潜航器、深海空间站的能源动力上应用前景广阔;在加快建设海洋强国的背景下,保障海洋能源供给成为重要的基础条件,开展铅基堆海洋核动力发展研究是推动我国海洋装备能源动力技术革新的关键内容。本文总结了海洋核动力的应用场景与发展需求,从技术特征、代表性应用、研制现状等方面系统梳理了铅基堆核动力的发展概况,凝练和剖析了包括核燃料与包壳材料、一回路关键设备、冷却剂工艺与氧测控、先进发电技术在内的铅基堆海洋核动力关键技术。立足国情研判了铅基堆海洋核动力面临的发展挑战,提出了低温铅基堆海洋核动力、高温高效铅基堆海洋核动力、一体化全自然循环铅基堆海洋核动力等可行技术路线。研究建议,强化前瞻性配套专项技术研发、加快部署装备示范工程,将铅基堆纳入重大能源战略、加快建设标准体系,设置国家级联合研发机构、构建科技创新和产业发展新模式,更好服务国家海洋战略并推动海洋核动力跨越式发展。

新疆阜康抽水蓄能电站含泥夹层变形体稳定性分析

新疆阜康抽水蓄能电站上水库0号变形体底部含泥夹层较为发育,严重威胁工程稳定运行。为了评价含泥夹层变形体稳定性,基于变形体有限元分析以及表面位移、测斜孔位移监测数据,研究变形体失稳破坏特征及位移时空变化规律。结果表明:变形体在天然情况下处于稳定状态,在压坡体的作用下,边坡整体安全系数由1.33提高至1.51,安全系数较天然状态下增加13.5%。压坡处理后变形体稳定性明显提高,但是含泥夹层的强度参数对变形体稳定性影响较大,含泥夹层强度参数降低40%,变形体整体安全系数低于1.0。变形体各表面变形测点累计水平位移最大8.56 mm,累计垂直位移最大10.03 mm;测斜孔上下游与左右岸最大平均位移不超过0.6 mm。变形体的变形主要表现为沿含泥夹层蠕滑变形,应在工程施工、水库蓄水及运行期间对变形体不同部位进行系统的变形监测工作。

一种自动监测站多功能电源模块的方案研究

针对水利自动监测站设备的电源供电问题,提出了一种基于Mini-PCIe模块的多功能电源模块方案。该方案通过集成电源转换和控制等功能,实现结构简单、体积小、移植方便、运维便捷的效果。同时,采用各类瞬态抑制稳压管配合光电隔离芯片实现防雷击与浪涌,保证AC采样通道的安全。该方案具有较高的电源转换效率、丰富的功能和良好的安全性能,可广泛应用于各类场景。

基于双频信号注入法的船舶交流电网绝缘监测装置应用探析

为了解决船舶交流电网绝缘故障实时在线监测定位问题,提出了一种基于双频信号注入法的船舶交流电网绝缘监测装置设计方案。对双频信号注入法的工作原理进行研究,系统以STM32F103ZE芯片为控制核心,运用基2时间抽取1024点FFT实现注入低频信号的提取。明确了注入信号的频率选取原则,试验分析确定注入信号频率为15 Hz和5 Hz。经过实际运行测试与结果分析,基于双频信号注入法的船舶交流电网绝缘监测装置最大误差率不超过2%,完全满足对地绝缘电阻测量精度±5%的设计要求。试验结果验证了船舶交流电网绝缘监测装置的可靠性和有效性,所提出设计方案大大降低船员工作强度,提高了舰船电力系统的供电连续性和安全性。

电动汽车充电站群电能质量协同监测技术

为解决现有电能质量监测技术存在的监测范围小、精度低的问题,优化设计电动汽车充电站群电能质量协同监测技术。根据电动汽车充电站群的组成结构,构建充电站群模型,模拟充电过程。针对电能质量指标配置相应的电能质量监测点,协同采集与处理电动汽车充电站群暂态信号,通过对扰动、谐波/间谐、电压偏差、频率偏差等指标的计算,得出电能质量的协同监测结果。通过与现有监测技术的对比,所设计监测技术的监测范围扩大了1306.24m~2,且监测误差更低。

电力计量主站采集链路监测技术分析

随着社会经济的不断发展,电力行业面临着机遇和挑战并存的发展局面,在这种背景下,各种类型的电力计量设备应运而生,在设备运行过程中,会产生大量的电能量数据,为提高电力计量主站运行的稳定性,需要结合电力企业的实际情况,利用先进的监测技术,建立完善成熟的电力计量主站采集链路监测机制,实现对关键业务链路的动态化监测,助推电力计量主站的高质量、高效率运行成为现实。该文基于电力计量主站采集链路的建设现状,详细分析采集链路监测体系的建设方法,其中涵盖科学搭建技术架构、整合处理监测信息以及优化设计监控系统等,旨在强化电力计量主站的运维效果,以期为相关人员提供参考和借鉴。

海洋环境下漂浮光伏电站浮体HDPE材料的抗疲劳性能与优化策略

研究旨在深入探讨高密度聚乙烯(HDPE)材料在海洋环境下应用于漂浮光伏电站浮体的抗疲劳性能。通过试验研究、理论分析和案例研究,探讨了海洋环境因素对漂浮光伏电站浮体HDPE材料疲劳性能的影响,并提出了改进策略。研究发现,在海洋环境中,改良的HDPE材料在漂浮光伏浮体中表现出优越的抗疲劳特性。使用高效的光屏蔽剂、光吸收助剂和合金混合物作为物理保护,同时使用持久的高低温抗氧化剂、聚合物抗紫外线稳定剂、抗疲劳剂和紫外线活化增韧系统,可以增强HDPE材料的抗老化和加工性能。改良的HDPE材料在海洋环境中的漂浮光伏电站浮体的耐久性和稳定性得到了提升。

地铁站旁电力管沟防护与监测技术

通过采用微型隔离桩和隔离砂桩,成功解决了电力管沟与车站端头井之间的关键区域施工问题,并探讨了工程监测方法及应急预案。在施工过程中,严格按照规范实施了隔离加固措施,确保工程的顺利进行。对地表沉降、位移变化以及电力管沟振动进行了全面监测。通过实时跟踪施工过程,有效地控制了施工对周边环境和电力管沟的影响。提出的施工工艺和监测方案的综合运用为工程的安全顺利实施提供了有力支持。

船舶电站发电原动机技术特点分析及选型研究

该文概要介绍船舶电站及其对发电用原动机的技术要求,相应阐述汽轮机、柴油机及燃气轮机等几类热力发动机的技术特点,重点对几类发动机的技术特点进行对比,并对其在船舶电站发电原动机领域的应用前景及选型进行分析。柴油机工作效率高,无需锅炉和冷凝器等设备,在船舶电站领域有着广泛的应用。无论哪一种船舶,应急发电机组都用柴油机作为原动机。汽轮发电机组运转稳定且功率较高,但由于辅助设备较多,致使工作可靠性较低,因此,为实现快速备航和提高生命力,也需要安装柴油发电机组作为备用机组。燃气轮机具备尺寸小、重量轻的优势,由于技术和经济性等原因,目前除少量军用舰船外,少有民用船舶采用燃气轮发电机组,但考虑到其技术优势,仍有一定的发展前景。

抽水蓄能电站大坝强震监测系统改造

针对内蒙古呼和浩特抽水蓄能发电有限责任公司(以下简称呼蓄电站)大坝强震监测系统设备老化、性能下降、故障率高的问题,对其进行改造:将传感器、采集仪、供电线路、通信线路改造升级,并增加自动采集系统,将上下库的监测数据通过光缆汇集到厂房通信室,由1套强震监测软件实时处理监测数据。该系统可与大坝安全监测系统进行触发联动,能够在震后第一时间完成数据采集,既保证了安全监测数据的时效性,又保证了工作人员的人身安全,可满足大坝安全监测快速反馈和远程管理的要求,提升了管理效率。

云南区域山地新能源场站网络安全运管模式探索

随着网络攻击频率持续上升,网络安全设备的部署逐渐增多,给企业网络安全运营管理带来更多挑战。通过研究,建立规范的网络安全防护体系流程,建设完善的接入场站的网络安全模式,设计详细的安全管理流程,制定细分场景的应急预案,并结合新能源场站区域广、控制复杂、物理威胁风险高等特点,探索适用于山地新能源的网络安全运营模式。

基于物联网的电力计量主站采集链路监测研究

为了有效监测采集链路,清晰呈现监测结果,设计了基于物联网的电力计量主站采集链路监测方法。利用无线传感器采集电力计量主站各环节采集链路的相关信息,并对信息进行预处理,通过主成分分析法提取链路相关信息特征,利用K最近邻分类算法分类识别降维后的特征信息,完成采集链路状态监测。实验结果表明:该方法可精准监测采集链路状态,数据更新速率较快,输出监测结果清晰度高。