Results 11 to 20 of about 1,232,259 (167)
500kV直流断路器快速机械开关典型故障特性及可靠性提升方法研究 [PDF]
, 2023 直流断路器是构建柔性直流电网不可或缺的关键设备。快速机械开关是直流断路器中承载电流、实现快速分合闸、耐受分闸恢复电压的核心组件，其结构复杂、动作速度快、电气应力严酷、可靠性要求高，因而设计研制难度大，任一环节出现问题均会影响直流断路器乃至柔直电网的安全可靠运行。然而，目前快速机械开关由于存在设计选型不合理、工艺管控不严格、试验考核不完善等问题，导致在实际工程应用中故障率较高。针对已应用于张北柔性直流电网试验示范工程的500 kV直流断路器，分析了直流断路器研制、调试 ...
张涛 +4 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Harnessing the potential of thermoelectric technology to convert waste heat into electricity, this study sought to enhance overall energy utilization efficiency and contribute to sustainable development through the advancement of environmentally friendly direct‐conversion materials.
Wenying Wang +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Thermo‐responsive hydrogels based on poly(N‐isopropylacrylamide) (PNIPAM) are promising candidates for soft actuation, yet their practical applications are often constrained by sluggish thermo‐responsive kinetics and insufficient mechanical robustness.
Hui Liu +5 more
wiley +1 more source
Gaoya dianqi, 2020 针对机械性能进行检测是当前高压开关特性检测的主要方法,例如动特性仪、示波器和电秒表,此类方法无法在线进行检测,且检测周期长。针对当前高压开关特性检测中的不足,文中研究射频法在高压开关特性的现场检测与评估的应用。首先对射频法与传统机械特性测试结果的等效性进行了仿真分析,然后基于射频法在现场对某高压开关的性能进行非接触测量与评估。实验结果表明,射频法与传统检测方法检测结果等效性较好,当射频不同期时间大于5 ms时,可以认为高压开关合闸性能不合格,当射频分闸不同期时间大于3 ms ...
牛博 +5 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Ti3C2Tx MXene, with its exceptional electrical conductivity, mechanical flexibility, and processability, compatible with wearable and integrated systems, plays a crucial role in advancing flexible photodetectors for intelligent perception systems and bioinspired artificial vision.
Chu‐Qiao Hu +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Alkali metal–chalcogen batteries (AMCBs) are one of the most promising next‐generation energy storage systems because of their high energy density and reasonably low cost. However, the practical application of AMCBs is severely hindered by the volume expansion of the chalcogen cathode, the shuttle effect of polychalcogenides, and unstable ...
Yong Liu +11 more
wiley +1 more source
Gaoya dianqi, 2015 对用于断路器机械特性测试的几种位移传感器原理进行了阐述,针对中压断路器机械操动机构结构紧凑的特点,对影响中压断路器机械特性监测精度的因素进行了分析。设计了抗干扰能力强的传感器信号检测电路,通过机械特性性能测试试验和机械寿命试验证明:旋转编码器和激光位移传感器这两种位移传感器是中压断路器机械特性监测的理想传感器,在不影响断路器原有性能参数及可靠性的情况下,不但能真实地反映其行程特性,而且能够在高电压、大电流、强冲击振动的恶劣环境下长期稳定工作。
张显聪 +6 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Piezocatalytic technology utilizes mechanical strain or stress‐induced piezoelectric phenomena to produce robust internal electric fields, markedly improving the separation efficiency of e−‐h+ pairs. This method has emerged as a focal point in catalysis by removing reliance on conventional light or electrical energy via its mechanical‐to ...
Yue Zhou +5 more
wiley +1 more source
Gaoya dianqi, 2017 笔者在理论分析操作机构标准和异常机械特性曲线基础上,对40.5、252、1 100 kV 3个电压等级的高压断路器液压弹簧和弹簧操作机构的机械特性进行了测试,同时研究了操作机构机械特性参数变化对操作机构机械性能的影响。理论及试验研究表明:操作机构的机械特性能够反映机构的机械状态,通过对操作机构机械特性的分析可以评估操作机构的运行状况,研究结果对断路器操作机构状态评估具有一定的指导意义。
付荣荣 +7 more
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