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Cotidal charts and tidal power input atlases of the global ocean from TOPEX/Poseidon and JASON-1 altimetry 被引量:5
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作者 WANG Yihang FANG Guohong +3 位作者 WEI Zexun WANG Yonggang WANG Xinyi XU Xiaoqing 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2012年第4期11-23,共13页
The global distributions of eight principal tidal constituents, M2, S2, K1, O1, N2, K2, P1, and Q1, are derived using TOPEX/Poseidon and JASON-1(T/P-J) satellite altimeter data for 16 a. The intercomparison of the d... The global distributions of eight principal tidal constituents, M2, S2, K1, O1, N2, K2, P1, and Q1, are derived using TOPEX/Poseidon and JASON-1(T/P-J) satellite altimeter data for 16 a. The intercomparison of the derived harmonics at 7000 subsatellite track crossover points shows that the root mean square (RMS) values of the tidal height differences of the above eight constituents range from 1.19 cm to 2.67 cm, with an average of about 2 cm. The RMS values of the tidal height differences between T/P-J solutions and the harmonics from ground measurements at 152 tidal gauge stations for the above constituents range from 0.34 cm to 1.08 cm, and the relative deviations range from 0.031 to 0.211. The root sum square of the RMS differences of these eight constituents is 2.12 cm, showing the improvement of the present model over the existing global ocean tidal models. Based on the obtained tidal model the global ocean tidal energetics is studied and the global distribution of the tidal power input density by tide-generating force of each constituent is calculated, showing that the power input source regions of semidiurnal tides are mainly concentrated in the tropical belt between 30S and 30N, while the power input source regions of diurnal tides are mainly concentrated off the tropic oceans. The global energy dissipation rates of the M2, S2, K1, O1, N2, P1, K2 and Q1 tides are 2.424, 0.401, 0.334, 0.160, 0.113, 0.035, 0.030 and 0.006 TW, respectively. The total global tidal dissipation rate of these eight constituents amounts to 3.5 TW. 展开更多
关键词 satellite altimetry global ocean tides tidal energetics tidal power input
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Numerical study of hydrodynamic mechanism of dynamic tidal power 被引量:5
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作者 Peng Dai Ji-sheng Zhang +4 位作者 Jin-hai Zheng Kees Hulsbergen Gijs van Banning Jeroen Adema Zi-xuan Tang 《Water Science and Engineering》 EI CAS CSCD 2018年第3期220-228,共9页
Dynamic tidal power is a new way of capturing tidal energy by building a water head using a dike perpendicular to the coast. This study explored the hydrodynamic mechanism of the water head across an intended dynamic ... Dynamic tidal power is a new way of capturing tidal energy by building a water head using a dike perpendicular to the coast. This study explored the hydrodynamic mechanism of the water head across an intended dynamic tidal power dike system using the Delft3 D-FLOW software module. The propagating wave was simulated in a rectangular domain with a horizontal sea bottom at a 30-m depth. A significant water head was created across the dike by blocking the water. The water head increased with increasing dike length and increasing undisturbed tidal current acceleration. The maximum water head for the dike with a length of 50 km, located 900 km from the western boundary, was 2.15 m,which exceeded the undisturbed tidal range. The time series of the water head behaved in a manner identical to the undisturbed tidal current acceleration. The distribution of the water head over the dike assumed an elliptical shape. A parasitic wave was generated at the attachment and scattered outward. The phase lag across the dike did not behave as a linear function of the detour distance. 展开更多
关键词 DYNAMIC tidal power Marine RENEWABLE energy Added mass PHASE-SHIFT COASTAL engineering Delft3D
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Tidal Current and Tidal Energy Changes Imposed by a Dynamic Tidal Power System in the Taiwan Strait, China 被引量:2
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作者 DAI Peng ZHANG Jisheng ZHENG Jinhai 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第6期953-964,共12页
The Taiwan Strait has recently been proposed as a promising site for dynamic tidal power systems because of its shallow depth and strong tides. Dynamic tidal power is a new concept for extracting tidal potential energ... The Taiwan Strait has recently been proposed as a promising site for dynamic tidal power systems because of its shallow depth and strong tides. Dynamic tidal power is a new concept for extracting tidal potential energy in which a coast-perpendicular dike is used to create water head and generate electricity via turbines inserted in the dike. Before starting such a project, the potential power output and hydrodynamic impacts of the dike must be assessed. In this study, a two-dimensional numerical model based on the Delft3 D-FLOW module is established to simulate tides in China. A dike module is developed to account for turbine processes and estimate power output by integrating a special algorithm into the model. The domain decomposition technique is used to divide the computational zone into two subdomains with grid refinement near the dike. The hydrodynamic processes predicted by the model, both with and without the proposed construction, are examined in detail, including tidal currents and tidal energy flux. The predicted time-averaged power yields with various opening ratios are presented. The results show that time-averaged power yield peaks at an 8% opening ratio. For semidiurnal tides, the flow velocity increases in front of the head of the dike and decreases on either side. For diurnal tides, these changes are complicated by the oblique incidence of tidal currents with respect to the dike as well as by bathymetric features. The dike itself blocks the propagation of tidal energy flux. 展开更多
关键词 DYNAMIC tidal power ocean RENEWABLE energy Taiwan STRAIT Delft3D HYDRODYNAMIC impact
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Community Smart Grid Utilizing Dynamic Demand Response and Tidal Power for Grid Stabilization 被引量:1
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作者 Anna Demeo Michael L. Peterson 《Smart Grid and Renewable Energy》 2013年第7期465-472,共8页
Conventional electricity generation is one of the largest contributors to climate change. Renewable energy sources are a promising part of the solution but uncertainty combined with a lack of controllability prevents ... Conventional electricity generation is one of the largest contributors to climate change. Renewable energy sources are a promising part of the solution but uncertainty combined with a lack of controllability prevents renewable sources of power from being direct substitutes of conventional energy sources. This shift towards a higher penetration of renewable energy into the electric grid can be realized with the implementation of a more sophisticated smart grid, which uses dynamic demand response to alter demand on following generation. Research on renewable energy penetration of the grid predominately focuses on wind and solar power resources but demand cannot always match availability from these sources and therefore greatly increases the need for energy storage. Tidal power differs from solar and wind. It’s a predictably renewable resource which makes it extremely valuable even on a relatively small scale. Introduction of tidal power in a high penetration micro-grid can serve to stabilize the grid and reduce the amount of storage required. Widely different time scale for wind, solar and tidal power availability results in low cross correlations and therefore increases stability. This research describes an incremental approach to migrating a grid-tie island towards the formation of a smart-micro grid. The system will include a high penetration of three distributed generation systems, wind, solar and tidal and utilize commercially available energy storage and a smart-home management controller. Dynamic demand response through load balancing is implemented to minimize interactions with the electric grid. A second component of this work is to determine the optimum tidal generation capacity for the micro grid such that needed storage capacity from batteries or the utility grid is minimized. 展开更多
关键词 SMART GRID tidal power RENEWABLE Energy Micro GRID
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Counter-Rotating Type Tidal Range Power Unit 被引量:1
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作者 Toshiaki Suzuki Toshiaki Kanemoto 《Journal of Energy and Power Engineering》 2013年第12期2381-2387,共7页
The counter-rotating type tidal range power unit composed of the axial flow type tandem runners and the peculiar generator with double rotational armatures is proposed to utilize effectively the tidal range. In the un... The counter-rotating type tidal range power unit composed of the axial flow type tandem runners and the peculiar generator with double rotational armatures is proposed to utilize effectively the tidal range. In the unit, the front and the rear runners counter-drive the inner and the outer armatures of the generator, respectively. Besides, the flow runs in the axial direction at the rear runner outlet while the flow has not the swirling component at the front runner inlet, because the angular momentum change through the rear runner must coincides with that through the front runner. Such operations are suitable for bidirectional flows, namely working at the seashore with the rising and the falling tidal ranges, and the unit may be able to take place of the traditional bulb type turbines. To promote more the tidal power generation by this type unit, the runners were modified so as to be suitable for both rising and falling flows. The hydraulic performances are acceptable and take the optimum efficiency at the on-cam operation, while the trailing profiles of the runner blades determine mainly the theoretical output. 展开更多
关键词 tidal power tidan range bidirectional flows counter rotation tandem runners double rotational armatures.
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Experimental Study on Hydrodynamic Characteristics of Vertical-Axis Floating Tidal Current Energy Power Generation Device 被引量:3
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作者 MAYong LI Teng-fei +3 位作者 ZHANG Liang SHENG Qi-hu ZHANG Xue-wei JIANG Jin 《China Ocean Engineering》 SCIE EI CSCD 2016年第5期749-762,共14页
To study the characteristics of attenuation, hydrostatic towage and wave response of the vertical-axis floating tidal current energy power generation device (VAFTCEPGD), a prototype is designed and experiment is car... To study the characteristics of attenuation, hydrostatic towage and wave response of the vertical-axis floating tidal current energy power generation device (VAFTCEPGD), a prototype is designed and experiment is carried out in the towing tank. Free decay is conducted to obtain attenuation characteristics of the VAFTCEPGD, and characteristics of mooring forces and motion response, floating condition, especially the lateral displacement of the VAFTCEPGD are obtained from the towing in still water. Tension response of the #1 mooring line and vibration characteristics of the VAFTCEPGD in regular waves as well as in level 4 irregular wave sea state with the current velocity of 0.6 m/s. The results can be reference for theoretical study and engineering applications related to VAFTCEPGD. 展开更多
关键词 tidal current energy power generation device EXPERIMENT hydrodynamic characteristics ATTENUATION wave response lateral displacement
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Fatigue Life Prediction of Mooring Chains for a Floating Tidal Current Power Station
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作者 Fengmei Jing Liang Zhang Zhong Yang 《Journal of Marine Science and Application》 2012年第2期216-221,共6页
As a kind of clean and renewable energy,tidal current energy is becoming increasingly popular all over the world with the shortage of energy and environmental problems becoming more and more severe.A floating tidal cu... As a kind of clean and renewable energy,tidal current energy is becoming increasingly popular all over the world with the shortage of energy and environmental problems becoming more and more severe.A floating tidal current power station is a typical type of tidal current power transformers which can sustain the loads of wind,waves,and current,and even the extreme situation of a typhoon.Therefore,the mooring system must be reliable enough to keep the station operating normally and to survive in extreme situations.The power station examined in this paper was installed at a depth of 40 m.A 44 mm-diameter R4-RQ4 chain was chosen,with a 2 147 kN minimum break strength and 50 kN pretension.Common studless link chain was used in this paper.Based on the Miner fatigue cumulative damage rule,S-N curves of chains,and MOSES software,a highly reliable mooring system was designed and analyzed.The calculation results show that the mooring system designed is reliable throughout a 10-year period.It can completely meet the design requirements of American Petroleum institution(API).Therefore,the presented research is significant for advancing the design of this kind of power station. 展开更多
关键词 floating tidal current power station mooring system mooring chain fatigue analysis
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The Tidal Stream Power Curve: A Case Study
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作者 Jack Hardisty 《Energy and Power Engineering》 2012年第3期132-136,共5页
It is important to understand the relationship between the ambient ebb and flood currents and the electricity generated by tidal stream power generators to minimise investment risk and to optimise power generation for... It is important to understand the relationship between the ambient ebb and flood currents and the electricity generated by tidal stream power generators to minimise investment risk and to optimise power generation for distribution purposes. Such analyses no longer rely on average descriptions of the flow field or on single values for the device efficiency. In the present paper, we demonstrate a new method involving the integration of synthesised long termflow vectors with logistic descriptions of the device power curves. New experiments are then described with the Neptune Proteus vertical axis tidal stream power generator involving tow tests at speeds to 1.5 ms–1 in William Wright Dock on the Humber. The results are used to derive appropriate coefficients in the logisticcurve and to estimate the device’s annual electrical output. 展开更多
关键词 tidal STREAM power HARMONIC tidal TIME SERIES RESOURCE Analysis
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Counter-Rotating Type Horizontal-Axis Bidirectional Propellers for Tidal Stream Power Unit
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作者 Yuki Funami Yuji Nakanishi +2 位作者 Nak-Joong Lee Bin Huang Toshiaki Kanemoto 《Journal of Power and Energy Engineering》 2017年第7期34-44,共11页
Tidal stream power units with horizontal-axis propellers are one of promising technologies for generating the renewable green energy. The ebb and flow require that the power unit must operate in bidirectional tidal st... Tidal stream power units with horizontal-axis propellers are one of promising technologies for generating the renewable green energy. The ebb and flow require that the power unit must operate in bidirectional tidal streams. Hence a tidal stream power unit with counter-rotating type horizontal-axis bidirectional propellers is proposed in this paper. The blades with fully-symmetrical hydrofoils were optimized numerically. The output and flow conditions predicted by the computational fluid dynamics simulations are compared with the results of the wind tunnel experiments at the higher tip speed ratios, which are of expected usual operating conditions of this unit. The numerical and experimental results show good agreements. It is also confirmed that the flow discharged from the counter-rotating type propellers has no swirling component, though the single propeller generates the unacceptable swirling component. 展开更多
关键词 BIDIRECTIONAL PROPELLERS COUNTER-ROTATING TYPE Machine tidal STREAM power Unit Computational Fluid Dynamics
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A Numerical Prediction of Tip Vortices from Tandem Propellers in the Counter-Rotating Type Tidal Stream Power Unit
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作者 Hoyun Jung Toshiaki Kanemoto Pin Liu 《Journal of Power and Energy Engineering》 2017年第12期66-74,共9页
Ocean energy has a potential of providing a large amount of renewable energy around the world. One of the forms of ocean energy, tidal stream power is widely recognized as the continuous, predictable and eco-friendly ... Ocean energy has a potential of providing a large amount of renewable energy around the world. One of the forms of ocean energy, tidal stream power is widely recognized as the continuous, predictable and eco-friendly ocean energy source. Unique tandem propellers that can counter-rotate have been designed to generate electric power effectively from a tidal stream. This type of power unit has several advantages compare to the conventional unit with a single propeller. At the design of the tidal stream power unit, it is important to investigate the structure of the tip vortex tubes shedding to predict the load of the propeller. In this research, we investigated the tip vortex shedding using the CFD method for the conventional single propeller and counter-rotating type tandem propellers and estimated the performance efficiency using RANS (Reynolds Averaged Navier-Stokes) model and we confirmed the limitation of RANS model on the calculation of the tip vortex stretching. 展开更多
关键词 tidal Stream power Unit Counter-Rotation CFD (Computational Fluid Dynamics) TIP VORTICES MRF (Multiple Reference Frame) TANDEM PROPELLERS
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基于人工蜂群算法的配电网无功优化调度研究
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作者 周运斌 杨静 董楠 《微型电脑应用》 2024年第8期178-180,189,共4页
为了改善现有无功功率调度时算法执行效率,解决模型易陷入局部极值问题,提出一种基于改进人工蜂群算法模型。在分析等式和不等式约束的情况下,建立最小化实际功率损耗、电压偏差和电压稳定增强的无功功率调度目标函数。提出一种基于邻... 为了改善现有无功功率调度时算法执行效率,解决模型易陷入局部极值问题,提出一种基于改进人工蜂群算法模型。在分析等式和不等式约束的情况下,建立最小化实际功率损耗、电压偏差和电压稳定增强的无功功率调度目标函数。提出一种基于邻域半径选择的改进人工蜂群算法,设计一种新的邻域选择机制和改进的搜索策略。实验阶段,以IEEE39总线电力系统为例,对所提算法有效性和执行效率进行验证。与线性规划(LP)、粒子群优化(PSO)算法和基础人工蜂群(ABC)算法相比,改进ABC算法比其他算法执行效率更优,且解的质量更高。该模型为配电网电力调度及稳定性运行的发展提供了一定借鉴作用。 展开更多
关键词 智能电网 无功功率、电力调度 潮流约束 优化 人工蜂群
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Tidal Turbine Array Optimization Based on the Discrete Particle Swarm Algorithm 被引量:3
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作者 WU Guo-wei WU He +2 位作者 WANG Xiao-yong ZHOU Qing-wei LIU Xiao-man 《China Ocean Engineering》 SCIE EI CSCD 2018年第3期358-364,共7页
In consideration of the resource wasted by unreasonable layout scheme of tidal current turbines, which would influence the ratio of cost and power output, particle swarm optimization algorithm is introduced and improv... In consideration of the resource wasted by unreasonable layout scheme of tidal current turbines, which would influence the ratio of cost and power output, particle swarm optimization algorithm is introduced and improved in the paper. In order to solve the problem of optimal array of tidal turbines, the discrete particle swarm optimization(DPSO) algorithm has been performed by re-defining the updating strategies of particles’ velocity and position. This paper analyzes the optimization problem of micrositing of tidal current turbines by adjusting each turbine’s position,where the maximum value of total electric power is obtained at the maximum speed in the flood tide and ebb tide.Firstly, the best installed turbine number is generated by maximizing the output energy in the given tidal farm by the Farm/Flux and empirical method. Secondly, considering the wake effect, the reasonable distance between turbines,and the tidal velocities influencing factors in the tidal farm, Jensen wake model and elliptic distribution model are selected for the turbines’ total generating capacity calculation at the maximum speed in the flood tide and ebb tide.Finally, the total generating capacity, regarded as objective function, is calculated in the final simulation, thus the DPSO could guide the individuals to the feasible area and optimal position. The results have been concluded that the optimization algorithm, which increased 6.19% more recourse output than experience method, can be thought as a good tool for engineering design of tidal energy demonstration. 展开更多
关键词 tidal power wake model turbine layout discrete particle swarm algorithm
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潮流发电系统的无传感器自适应神经元控制策略
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作者 厉明珠 陈磊 《北京信息科技大学学报(自然科学版)》 2024年第5期50-57,共8页
在恶劣的海洋环境中,潮流发电系统的非线性、外部干扰和传感器故障等关键问题,使潮流发电机组难以准确运行于最大功率点处。为了提高潮流发电系统的能量转换效率和可靠性,提出了一种基于模型参考自适应系统(model reference adaptive sy... 在恶劣的海洋环境中,潮流发电系统的非线性、外部干扰和传感器故障等关键问题,使潮流发电机组难以准确运行于最大功率点处。为了提高潮流发电系统的能量转换效率和可靠性,提出了一种基于模型参考自适应系统(model reference adaptive system,MRAS)的自适应神经元控制(adaptive neural control,ANC)方法。考虑到湍流和浪涌扰动对潮流发电装置转子速度跟踪的影响,利用MRAS无传感器方法对ANC控制器的输入进行预处理,以准确获取潮流发电机组的转子速度信息;同时引入自调整灵敏度系数,设计神经元速度控制器自适应机制,提高系统的动态跟踪响应和抗干扰能力。仿真结果表明,所提控制策略可以提高潮流发电系统的功率捕获效率,具有良好的自适应性和可靠性。 展开更多
关键词 潮流发电系统 自适应神经元控制 无传感器控制 功率捕获效率
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基于改进变步长爬山法的潮流能发电MPPT算法
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作者 安润泽 赵阳 +1 位作者 华迪 王鑫 《船舶工程》 CSCD 北大核心 2024年第1期15-21,57,共8页
针对传统变步长爬山法在潮流能发电系统中对潮流流速突变和随机性波动的适应能力较差,易出现扰动方向判断错误和速度追踪过快的问题,在变步长爬山法的基础上提出一种改进变步长最大功率追踪(MPPT)算法。该方法能够准确判断多种最大功率... 针对传统变步长爬山法在潮流能发电系统中对潮流流速突变和随机性波动的适应能力较差,易出现扰动方向判断错误和速度追踪过快的问题,在变步长爬山法的基础上提出一种改进变步长最大功率追踪(MPPT)算法。该方法能够准确判断多种最大功率跟踪的情况并采用两次采样点下的功率和转速的变化程度确定下一时刻步长的大小,自动根据获能系数大小进行分阶段调节,实现对潮流流速突变情况的应对,从而实现最大功率的跟踪。在MATLAB/Simulink环境下搭建基于PID控制与自抗扰控制的仿真系统进行仿真试验,结果表明,改进的变步长爬山法不仅能够实现最大功率的跟踪,而且对潮流流速的随机性波动和突变情况的适应能力更强,具有良好的稳态特性。 展开更多
关键词 潮流能发电系统 改进变步长爬山法 最大功率跟踪 自抗扰控制
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中国海洋潮流能发电技术与装备现状、新的机遇与挑战
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作者 褚景春 贾法勇 《太阳能学报》 EI CAS CSCD 北大核心 2024年第8期668-674,共7页
总结中国海洋潮流能发电技术与装备发展的现状,并与国际水平进行比较,指出中国在该领域的先进性和不足;同时分析中国“海洋强国”战略、“双碳”战略目标给海洋潮流能发电带来的诸多机遇,以及随之而来的种种挑战。对中国海洋潮流能发电... 总结中国海洋潮流能发电技术与装备发展的现状,并与国际水平进行比较,指出中国在该领域的先进性和不足;同时分析中国“海洋强国”战略、“双碳”战略目标给海洋潮流能发电带来的诸多机遇,以及随之而来的种种挑战。对中国海洋潮流能发电技术与装备的水平、未来的发展方向提出建议和看法。 展开更多
关键词 海洋潮流能 发电技术与装备 现状 机遇和挑战
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Analysis of characteristics of time-frequency correlations between runoff,tidal range and salinity in the Changjiang Estuary 被引量:3
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作者 FEI Yuejun XU Lili +3 位作者 DU Panjun GUAN Qinle KANG Xing XIAO Wenjun 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2011年第5期84-93,共10页
Power spectrum and cross-wavelet transform analysis was adopted to study the time-frequency characteristics and multiscale correlations between runoff,tidal range and salinity in the Changjiang Estuary based on the ru... Power spectrum and cross-wavelet transform analysis was adopted to study the time-frequency characteristics and multiscale correlations between runoff,tidal range and salinity in the Changjiang Estuary based on the runoff data collected at the Datong Station,the tidal range measured at the Baozhen Station,and the salinity at the Baogang Station from 2008 to 2009.The variations of the salinity showed significant periodicity at scales of 2-3,7-8,14-15 and 26-30 d.The correlation between the salinity and the runoff and the tidal range were found to be significantly related to shock at scales of 5-7,14-15,26-30 d and 0.5 a.The correlation between the runoff and the salinity was mainly in the same phase,while the correlation between the tidal range and the salinity was in the antiphase.Different frequency bands were related to different degrees,and their relevance increased as the resonance frequency decreased.In addition,changes of the seasonal runoff were obvious.Specifically,a point of discontinuity was reached in early June with a cycle of 7-8 d,which coincided with the periodicity of plum rains in the Changjiang-Huaihe region.High-frequency changes (8-16 d period) of the salinity corresponded to the time domain in January-April 2008,February-April 2009 and October-December 2009 and exhibited an approximately 0.5 a (184 d) long frequency oscillation.Short-period changes were found to be stronger than long-period changes.Cross-wavelet transforms for the salinity,the runoff and the tidal range revealed local features in the time domain,while the significant levels of different periodic oscillations were observed in the frequency domain.The correlation characteristics of the salinity and the runoff were significant in the 80-90 d frequency domain,indicating that the major impact of the runoff on the salinity was reflected in seasonal changes.The tidal range on the small scale of 14-15 and 30-32 d was more obvious than the runoff. 展开更多
关键词 SALINITY RUNOFF tidal range power spectrum wavelet transform
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Review on Tidal Energy Technologies and Research Subjects 被引量:1
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作者 Chul Hee JO Su Jin HWANG 《China Ocean Engineering》 SCIE EI CSCD 2020年第1期137-150,共14页
Tidal current power is one of the promising and reliable renewable energies with the advantage of continuous and predictable resource. It can make stable electricity regardless of weather conditions or seasons all yea... Tidal current power is one of the promising and reliable renewable energies with the advantage of continuous and predictable resource. It can make stable electricity regardless of weather conditions or seasons all year around. The required technologies for tidal current power in the ocean have been developed for years and now recognized that it could be commercialized after intensive field tests and successful demonstrations. There are several tidal farm development projects in the world, such as the MeyGen project in UK with its commercialization at hand. However, various research subjects in the tidal current energy field are seeking improvements and industrialization of tidal current power in terms of economy and technical reliability. This paper introduces the resource assessment procedure of tidal energy that has been applied in Korea coastal regions. The key research subjects for tidal current power together with the interaction effect of multi-arrangement is described. Also, this paper is to introduce the research output of each subject such as turbine design, experimental validation, turbine interaction and wake, multi-array module, FSI (fluid-structure interaction), and duct application. 展开更多
关键词 tidal current power resource assessment turbine design experimental validation turbine interaction multi arrangement FSI(fluid-structure interaction)
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近海低碳能源电力产业技术及成本的现状与挑战Ⅱ:挑战与趋势
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作者 杨敬柏 金冬云 鲁继平 《移动电源与车辆》 2024年第3期63-68,共6页
近海低碳能源技术有着广阔的发展前景,有望在未来为人类提供更多的清洁电力,需要对其产业发展现状、问题挑战和发展趋势进行深入讨论与分析。本篇为讨论与分析的第二部分:挑战与趋势,将主要针对近海低碳能源技术中面临的挑战进行分析,... 近海低碳能源技术有着广阔的发展前景,有望在未来为人类提供更多的清洁电力,需要对其产业发展现状、问题挑战和发展趋势进行深入讨论与分析。本篇为讨论与分析的第二部分:挑战与趋势,将主要针对近海低碳能源技术中面临的挑战进行分析,主要包括大型化发展中的技术创新问题、开发成本高昂、安装及运维的可靠性问题、海洋环境影响等。为了应对这些问题的挑战,未来低碳能源电力技术需要在技术多元化、产业综合化、区域深远化、体系智能化等4个方面开展研究,加强科研创新、政策支持、市场推广、国际合作等方面的工作,实现电力能源的清洁利用和海洋生态环境可持续发展。 展开更多
关键词 电力能源 海上风电 海上光伏 波浪能 潮流能 问题与挑战
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Modeling assessment of tidal current energy in the Qiongzhou Strait, China 被引量:5
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作者 WU He YU Huaming +1 位作者 DING Jie YUAN Dekui 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2016年第1期21-29,共9页
In the present study, an existing three-dimensional finite volume computational ocean model (FVCOM) was refined and configured including an algorithm for computing the power density and mean power density at Qiongzh... In the present study, an existing three-dimensional finite volume computational ocean model (FVCOM) was refined and configured including an algorithm for computing the power density and mean power density at Qiongzhou Strait of China. The refined model was validated with the measured tidal levels and tidal currents at different gauging stations. The model results are in reasonable agreement with the measured data. Based on the modeling results, we assess the resource of the tidal stream energy in the Qiongzhou Strait and discuss the temporal and the spatial distribution of the tidal current energy there. The conclusion is extracted: the higher power density occurs in the middle area of the strait, and lower at both sides. Characteristics of power density such as the maximum possibility speed, maximum power density during the spring tide period and the neap tide period, have the similar distribution. The southeast part and central area of the strait are of rich tidal current energy, where the maximum possibility speed can reach to 4.6 m/s, and the maximum power density of the spring tide period and the neap tide period can reach 5 996 and 467 W/mz separately in the surface layer The annual mean power density can reach 819 W/m2. Statistical length of accumulative time of the velocity exceeding 0.7 m/s is about 4 717 h at local point during a year. The total theoretical tidal current energy resource is approximately 189.55 MW and the available exploited energy on present technology condition is 249, 20.2 and 263 GW/a separately by using the methods FLUX, FARM and GC in the Qiongzhou Strait. 展开更多
关键词 tidal current energy numerical model power density Qiongzhou Strait
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