Results 21 to 30 of about 11,890 (118)
Dianci bileiqi, 2018 海上风力发电产业的蓬勃发展面临日益严重的雷电灾害威胁,为有效指导海上风电机组的雷电防护研究,需要研究海洋环境对海上风场接地系统雷击特性的影响。利用PSCAD软件搭建简化海上风场模型,讨论海洋土壤分层环境下上层海水深度和下层土壤电阻率对风机接地系统雷击暂态响应的影响,分析增加接地体长度对于降低暂态过电压的效果。仿真结果表明:风机遭受雷击后,浪涌会传播至其他相连风机,距离雷击点越远的风机,塔底暂态电位幅值越低。下层海床土壤电阻率越大,风机塔底暂态电位幅值越高。上层海水深度越大,风机塔底暂态电位幅值越小 ...
付国定
doaj
Journal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.ABSTRACT Bangladesh's goal of achieving high‐income status by 2041 requires dependable, low‐emission, and affordable energy. With near‐universal grid coverage and increasing demand, nuclear energy is a strategic asset for long‐term baseload supply. However, the existing financing model, typified by the country's most expensive $12.65 billion Rooppur ...
Hafiz Ahmed
wiley +1 more source
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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International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source
Gaoya dianqi, 2015 由于目前风电场出线容量整定计算时,标准风速远小于风机实际运行风速,造成了风场出线输送能力的浪费。文中提出了一种综合考虑风机出力特性和输电线路允许载流量变化特性的风电场出线增容方法。通过分析风机的风速功率曲线和输电线路最大载流量计算模型,将风机总功率和导线最大载流量在不同风速下进行动态匹配,以作为运行和设计中增容方案制定的基础。对于运行中的风电场,计算风机极限投运量;正在设计阶段中的风电场送出线路,降低所用导线的截面积。经实例分析,该方法有效增大了风电场的出线容量,提高了风电场运行经济性。
秦嘉南 +4 more
doaj
Regulation &Governance, Volume 20, Issue 1, Page 35-63, January 2026.ABSTRACT Existing literature largely agrees that authoritarian regimes establish channels for political participation to gather valuable information on citizens' anti‐regime sentiments and policy preferences and to supervise lower‐level bureaucrats and firms.
Anton Bogs
wiley +1 more source
Dianci bileiqi, 2017 贵州省属于我国西南部高原山地,风能资源丰富,目前全省并网型风电场建设已经达到快速增长阶段。由于贵州省特殊的地形地貌和山地气候特征,导致了雷电活动的复杂性和雷灾的易发性。风力发电机因其所处位置海拔高,极易遭受雷击。对风力发电机进行实地数据勘查,采用CDEGS软件建立风力发电机三维数值模型,利用土壤电阻率和土壤分层模型,结合雷电特征参数和风力发电机采用的防雷系统,分析风力发电机遭受雷击时其周边的电磁场变化及对人员、设备和系统的危害,同时提出了减小雷击对山区风力发电机危害的方法 ...
曾勇 +4 more
doaj
Public Participation in China's State‐Created ICT Spaces: Explaining Participation Patterns
Regulation &Governance, Volume 20, Issue 1, Page 64-89, January 2026.ABSTRACT It has become commonplace for non‐democratic regimes to integrate information and communication technologies (ICTs) into their governance system. However, how citizens make use of these new digital opportunities in an authoritarian setting remains understudied. Based on an online survey in China in 2021, we find that a surprisingly large share
Wiebke Rabe +3 more
wiley +1 more source
Gaoya dianqi, 2019 针对大规模双馈型机组所组成的风电场,提出1种将变桨机构动作情况作为风电场分群聚类指标的等值建模方法。通过将能够表征变桨机构动作状态的特征向量输入到支持向量机中,对风电机组进行动态分群,将同一群内的风机进行等效合并。此外叙述了等效机组参数计算方法,建立风电场多机等效模型。经过对不同建模方法的比较得出,此方法在保证仿真精度的前提下大幅度缩小了仿真时间,且仿真结果更加接近风电场实际运行工况,验证了该方法能够更加准确的表现出风电场并网点的动态特性。
付盼, 胡庆林
doaj
Integrative Conservation, Volume 4, Issue 4, Page 641-651, December 2025.Key Largo woodrats are a small and endangered island species, whose individuals tend to occur in family groups. Isolation from mainland populations, predation, and habitat fragmentation have caused genetic drift, leading to low overall diversity. Here, we found that a major category 4 hurricane promoted genetic diversity in the Key Largo woodrat ...
Taylor Ackley +5 more
wiley +1 more source