Results 11 to 20 of about 6,135 (199)
Evident but context‐dependent mortality of fish passing hydroelectric turbines
Conservation Biology, Volume 36, Issue 3, June 2022., 2022 Abstract Globally, policies aiming for conservation of species, free‐flowing rivers, and promotion of hydroelectricity as renewable energy and as a means to decarbonize energy systems generate trade‐offs between protecting freshwater fauna and development of hydropower. Hydroelectric turbines put fish at risk of severe injury during passage. Therefore,
Johannes Radinger +2 more
wiley +1 more source
Journal of Diabetes, Volume 13, Issue 6, Page 469-481, June 2021., 2021 Highlights The ACUDIN (ACUpuncture and laser acupuncture for treatment of DIabetic peripheral Neuropathy) trial showed significant effects of acupuncture compared with placebo on type 2 diabetes‐induced DPN, as measured by NCS. Improvement in the primary outcome variable sural SNAP amplitude indicates structural neuroregeneration following acupuncture.
Gesa Meyer‐Hamme +4 more
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Research on Model Reduction of Direct Drive Wind Farm Subsynchronous Oscillation Analysis Based on Alternating Direction Implicit Balanced Truncation Method [PDF]
, 2023 A reduced order model for subsynchronous oscillation analysis of direct drive wind farm was studied, and a balanced truncation method based on alternating direction implicit (ADI) was proposed.
LIU Kan, WANG Jinzhao, YAN Gangui
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风电场参与电网一次调频最优方案选择与风储协调控制策略研究 [PDF]
全球能源互联网, 2019 研究了大型风电场联合集中式储能系统参与电网一次调频的可行性与经济性，并提出一种风储联合调频控制策略。统计分析了正常运行与发生功率缺额事件下实际电网的频率特性，仿真验证了新能源机组参与电网一次调频的必要性；类比火电机组一次调频原理，提出了新能源机组参与一次调频的基本条件；分析了风电机组基于转子惯量、预留备用和配置储能3种调频方案的技术经济性，指出风电场装配集中式储能以承担一次调频是更为经济有效的调频方案。旨在充分利用风机转子惯量以减少配置储能容量，提出一种风储协调的调频控制策略，有效减少储能容量。
刘辉 +4 more
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Selection and Design of Wind Turbine Foundation for an Offshore Wind Farm [PDF]
, 2023 [Introduction] From 2022, the state subsidies for offshore wind power has been fully withdrawn. The foundation of offshore wind turbines is the supporting structure of wind turbines and plays a crucial role in the safe operation of offshore wind farms ...
Baoyang LI
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Analysis of Current Situation and Future Development of Offshore Wind Power Industry [PDF]
, 2023 [Introduction] Under the trend of accelerating the clean transformation of coastal energy and adjusting the industrial structure, offshore wind power will become an important support for the safe, clean and efficient transformation of power energy in ...
Jiachang LIU +3 more
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±500 kV柔直电网与新能源和常规发电机组的协调控制研究 [PDF]
全球能源互联网, 2018 张北±500 kV四端柔直电网工程的送端张北站和康保站作为新能源外送的汇集站，分别连接大规模风电场群，受端北京站和丰宁站分别作为新能源消纳中心和柔直电网的功率平衡节点与华北地区交流电网相连接，丰宁站建有抽蓄机组为系统提供紧急功率支撑。整个工程结构复杂，风电场群出力间歇性、随机性大，柔直系统直流电压对多端有功功率的吞吐平衡量敏感性强，受端负荷中心对电能质量要求高，这为柔直换流器、新能源风电机组和抽蓄机组的控制提出了严峻挑战。针对三者的协调控制展开研究，为柔直送端换流器设计了带频率附加控制的V-f控制 ...
王炳辉 +6 more
doaj +1 more source
Dianci bileiqi, 2021 风力发电机遭受雷击时,塔筒内控制电缆、塔基处以及箱式变压器低/高压侧都会出现过电压,且过电压还会通过集电电缆和联合接地装置传到其他风电机组。为研究雷击风电场时引起的暂态电压,建立了包含风力发电机、集电电缆、箱式变压器的等效模型。考虑了雷电流参数、风力发电机接地电阻大小及风电场拓扑结构对风电场过电压影响。结果表明:单台风电机组遭受雷击的情况下,风电机组过电压值与雷电流幅值成正比,且波前时间为8.0μs和20.0μs时,雷电流幅值对控制电缆缆芯过电压影响很小;风电机组过电压值与波前时间成反比 ...
罗永志 +5 more
doaj
Study on Maximum Power Tracking Strategy of 10 MW Medium Voltage Six-Phase Direct-Drive Permanent Magnet Wind Turbine [PDF]
, 2022 In order to maximize the grid-connected power of high-power offshore wind turbines, a maximum power tracking strategy suitable for medium voltage six-phase permanent magnet synchronous generator (MVSPMSG) was proposed in the paper based on the use of ...
BAI Ru +5 more
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水电科技, 2022 叶轮是风力发电机组的核心部分，它的迎风运行状况对机组的最优输出功率有着重要的影响。目前，大部分风力发电机都是采用变桨距，在叶片迎风方向变化时，可以有效地吸收风能：在低风速时，增大叶片的迎风面积，使风能得到最大化；在高风速下，减小迎风面积，保证叶轮在不超车的情况下安全地工作；为了保证输出功率的稳定，在不同的风速条件下，可以实时调节迎风区域；在紧要关头，可以让叶片随着推进器，减小对叶片的影响。在风力发电系统中，制动系统是其中最为关键的部分，它直接关系到风力发电的安全。在主流风力发电设备中 ...
建宁 秦, 亚军 张
semanticscholar +1 more source