Results 21 to 30 of about 158 (93)
, 2023 为提升远海风电对称双极柔性直流送端交流系统单相接地故障和两相短路故障工况（第一类故障）下的功率输送能力，以及三相接地故障工况（第二类故障）的交流电压稳定性，提出海上换流站协调控制策略。首先分析了第一类故障的过电压和极间环流产生机理，以及第二类故障的交流电压失稳机理。在此基础上，提出了功率平衡控制策略和输出有功电流策略。第一类故障下定电压控制极采用限压策略，功率平衡控制策略抑制极间环流，增大定电压控制极的功率，减少了交流电压控制器响应时间，提升了功率输送能力。第二类故障工况下 ...
叶荣 +4 more
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应用于海上风电接入的VSC-HVDC系统主网侧交流故障穿越方案 [PDF]
全球能源互联网, 2019 海上风电是可再生能源的重要形式和组成部分，通过基于电压源换流器的高压直流输电（VSC-HVDC）技术进行风电的远距离接入，使远离海岸的区域建设风电场成为可能，另外该技术也具备更大规模风场的接入能力。目前世界范围已有多个应用VSC-HVDC输电系统将海上风电场接入到陆上主电网的工程规划。然而，大规模风电会对系统的稳定性带来诸多挑战，尤其需要确保在故障工况下风电场及主电网的稳定性，VSC-HVDC以其优良的灵活性成为应对此类挑战的不二选择。本文对不同风电接入方式下系统的故障穿越方案进行了总结，对VSC ...
王国英 +3 more
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40 kV两级升压型全直流海上风电场用直流断路器的技术参数与样机设计
Gaoya dianqi, 2022 采用直流进行能量汇集和传输的全直流海上风电场代表了未来海上风电场的一种发展趋势。直流断路器是构建全直流风电场的核心设备。文中通过对全直流海上风电场的调研和分析，提出一种多端海上直流风电场系统拓扑，并结合海上风电场的主流参数要求对其电压等级和容量等级等参数进行配置；基于该风电场搭建仿真模型，进行稳态和故障仿真分析，提取出适用于该系统的直流断路器参数；基于该参数开展直流断路器各个部件的设计及仿真，并开展适用于海上平台应用条件的结构设计，设计出40 k V级适合海上风电场环境的直流断路器，可在3 ms内开断9
高树同 +4 more
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Key Technology of Construction Process Control of Guide Frame Platform Suction Bucket Foundation [PDF]
, 2023 [Introduction] The present, design and construction technology of suction bucket foundation is not mature, and there is lack of the normative guidance documents, the special research on the key technology of the construction process control of the ...
Huaquan LIU +4 more
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Experimental Research on Scour Protection Range and Protection Effect of Large Diameter Monopile Foundation [PDF]
, 2023 [Introduction] Under the wave-current combinations during the service period of offshore wind turbine, local scour inevitably occurs around pile foundation, which threatens the overall stability and safety of offshore wind turbine. [Method] In this paper,
Dezong ZHOU +4 more
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Application Analysis of CPTU Method for Jacket Large Diameter Short Pile Axial Bearing Capacity [PDF]
, 2023 [Introduction] At present, in China's offshore wind power projects, with the gradual development of the far-reaching sea, the most commonly used foundation structure of wind turbine is the pile foundation, and the most commonly used superstructure is the
Liji WANG
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Research and Improvement of Offshore Ship Fusion Recognition Algorithm [PDF]
, 2023 [Introduction] At present in China, the ships near offshore wind power platforms are mainly monitored by means of the ship AIS system and remote cameras. Such means lacking information technology often require a lot of manpower and material resources. In
Xiaohu WANG
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Research on Reasonable Consumption Rate of New Energy Transmission Under the New Power System [PDF]
, 2023 [Introduction] Large-scale new energy penetration is an important feature of the new power system. There is a certain contradiction between the high proportion of new energy consumption and the safe, economical and efficient operation of power system ...
Buyun SU, Shichao WANG
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Wind Power, Hydropower and Thermal Power Combined Low-Carbon Maintenance Optimization Based on Continuous Hidden Markov Model [PDF]
, 2023 [Introduction] In the context of the new power system, low-carbon maintenance of wind turbines and coordinated maintenance with conventional wind turbine generator systems (WTGS) need to be solved urgently.
Min XIE +4 more
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Gaoya dianqi, 2022 海底电缆较大的充电功率导致海上风电输电系统的工频过电压较严重,可采用高压并联电抗器进行限制。文中以中国某220 kV海上风电场为例,对其工频过电压进行了理论计算,并利用电磁暂态计算程序(alternative transient program-electro magnetic transient program,ATP-EMTP)建立了海上风电场经交流海缆送出系统模型,计算了输电系统工频过电压分布,进而对高压并联电抗器配置方案进行了分析。研究表明系统侧甩负荷过电压远大于风场侧甩负荷过电压 ...
张文君 +7 more
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