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Key technologies and bottlenecks of multi-energy complementary DC microgrid for residual coalbed methane drainage in abandoned mine [PDF]
, 2023 In terms of the collaborative utilization of residual energy and space resources in abandoned mines, under the framework of a green low-carbon multi-energy complementary system, a multi-energy complementary DC microgrid integrating wind-solar-gas-storage
Bin LI +7 more
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Research on Fault Current Controller of DC Microgrid [PDF]
, 2023 [Introduction] With the rapid development of AC/DC distribution networks and distributed generation technology, the role of DC microgrids in distribution networks is becoming increasingly important and will become an important component of future ...
Cong LIN, Fang GUO, Xiangfeng LI
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Research on Protection Scheme of DC Microgrid Integrated with Fault Current Limiting Control Technology [PDF]
, 2023 [Introduction] With the development of new loads, such as distributed power sources and electric vehicles, DC(Direct Current) microgrids have the advantages of fewer commutation links and lower system losses than AC(Alternating Current) microgrids, and ...
Bingyao ZHENG +6 more
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全球能源互联网, 2018 随着高压直流输电和直流电网技术的发展，研究可靠性高、经济性好的直流断路器变得越来越迫切。然而在目前关于直流断路器拓扑的研究中，采用的大都是IGBT理想开关模型，忽略了开关过程中IGBT的瞬态电气特性，从而无法得到足够精确的结果。首先介绍了基于二极管桥式子模块级联的混合式直流断路器的分断过程，然后对其分断期间的瞬态电气特性进行了理论分析，之后对比IGBT的两种模型并建立了精确的IGBT复合模型，最后在Simulink上搭建直流断路器故障分断仿真平台 ...
李博伟, 郝全睿, 尹晓东
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Collaborative Control Method for Offshore Wind Farms with Friendly Access to Hydrogen Energy Systems During Typhoons [PDF]
, 2023 [Introduction] With the steady progress of the carbon peaking and carbon neutrality goals, more and more distributed renewable energy is connected to the power grid.
Enyan XIE +4 more
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Effect of Dissolved Solids on Hardness and Viscoelasticity of Soft Rice(溶出固形物对软米硬度和黏弹性的影响) [PDF]
Shipin kexue jishu xuebao, 2021 The effects of dissolved solids on the hardness and viscoelasticity of soft rice were studied in comparison with that in japonica rice and glutinous rice.
MA Rongrong(麻荣荣) +3 more
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Remora Optimization Algorithm Combining Joint Opposite Selection and Host Switching [PDF]
, 2023 The remora optimization algorithm (ROA) is a meta heuristic optimization algorithm proposed in 2021. It simulates the behavior of parasitic attachment to the host, empirical attack and host foraging in the ocean.
JIA Heming, WEN Changsheng, WU Di, RAO Honghua, LIU Qingxin, LI Shanglong
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Secondary frequency control of islanded microgrid considering wind and solar stochastics
, 2023 As the high penetration of wind and photovoltaic distributed generation (DG) in the microgrid, the stochastic and low inertia emerge, bringing more challenges especially when the microgrid operates in isolated islands.
Chen, Jikai +4 more
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Dianci bileiqi, 2023 油气阀室的接地网是保护阀室电气设备和人员安全的重要设施，随着我国西气东输的发展，油气管道越来越多，管道阀室接地腐蚀情况越来越严重。本研究对4个油气管道阀室的接地网进行了调研，发现均存在不同程度的腐蚀情况。为了探明造成接地网腐蚀的主要原因，测量了这些阀室的地网接地电阻、土壤电阻率、接地体极化电位以及土壤理化参数。研究发现这些阀室的土壤微生物腐蚀属于微弱等级，也排除了自然环境引起接地体严重腐蚀的可能性。最后，通过分析这4个阀室的排流情况和接地扁钢的腐蚀特征，提出直流电流腐蚀是造成接地网腐蚀的主要原因 ...
李灿 +5 more
doaj
, 2019 直流供电与交流供电相比,具有供电效率高、线损少、安全可靠性高等优点,而且方便与光伏发电、蓄电池等直流电源结合,减少逆变损失和逆变器硬件成本,实现电力负荷的移峰填谷,对降低电网装机容量和初投资成本、减少电网低负载运行时间、提高电网效率等具有重要作用,因此直流供电及蓄电与智能微网整合是建筑供电系统的发展方向。本文讨论了建筑直流供电及蓄电系统的优化设计、优化运行策略、直流供电与交流供电的实验对比、仿真对比,并在实际建筑中进行了示范应用,展示了直流供电及蓄电系统的优势。国家重点研发计划项目 ...
孟超 +5 more
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