Gaoya dianqi柔性直流电网故障特征复杂，快速可靠识别直流线路故障具有挑战性，为此，文中提出一种基于虚拟功率的柔性直流电网故障保护方案。首先，分析了直流线路在不同故障下线路上限流电抗器虚拟功率变化规律；其次，针对不同故障下限流电抗器虚拟功率的差异性，通过计算限流电抗器虚拟功率变化率识别区内、外故障，并计算正、负极限流电抗器功率积分的比值确定故障极。最后，实验结果表明，所提出的保护方案能准确区分区内、外故障以及故障极，对通信要求低且无需复杂的数据处理，在不同工况下均能够可靠工作，满足柔性直流电网对保护的要求。
李玉东 +4 more
doaj
[Research progress on flexible wearable sensors for health monitoring]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiChen X, Xu G.
europepmc +1 more source
[Clinical efficacy of two-stage ear reconstruction using autologous rib cartilage in the correction of congenital microtia]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiXu ZC +6 more
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[Preparation and application of conductive fiber coated with liquid metal]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLiu C +5 more
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Gaoya dianqi柔性直流配电网的可靠性建立在成熟的中压直流断路器基础之上，然而直流断路器高昂的造价限制了其在配电网中的应用。为了降低直流断路器在配电网中的投资成本，结合耦合负压换流方式，设计了一种改进型多端口混合式直流断路器。首先，对现有直流断路器的拓扑结构进行了分析；然后，提出了改进型多端口混合式直流断路器的拓扑结构，对分断故障时的动作时序进行了设计；最后，基于Pscad/Emtdc搭建了四端环网型柔性直流配电网，仿真分析了改进型多端口混合式直流断路器切除双极短路故障时的暂态特性，得到了内部电压、电流的分布情况 ...
刘书瀚 +5 more
doaj
[How I treat vasovagal syncope in children]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiZou RM, Wang C.
europepmc +1 more source
[Research on tissue regeneration and engineered scaffold materials in prevention and treatment of lymphedema]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiYuan S, Deng C.
europepmc +1 more source
[Structural design and mechanical analysis of a "drum-shaped" balloon-expandable valve stent in expanded configuration]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhao Y +5 more
europepmc +1 more source
[Researches and clinical translation of smart dressings]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiLyu GZ, Zhao P.
europepmc +1 more source
[Development of a balloon sensor device for force-electrical coupling measurement of esophagus]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiRan P +5 more
europepmc +1 more source