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适用于直流配电网故障选线的电力电子变压器分步闭锁方案 [PDF]
, 2023 级联H桥型电力电子变压器（power electronic transformer with cascaded H-bridge，CHB-PET）是柔性变电站的重要组成设备之一，在直流配电网中具有重要作用。当CHB-PET低压直流侧发生双极短路故障后，故障电流上升速度快且幅值较高，易导致电力电子器件迅速闭锁，使低压直流电网保护难以准确获取故障信息。针对CHB-PET低压侧多分支直流配电网，提出一种基于PET分步闭锁的故障穿越策略。当检测到PET低压侧直流系统故障后 ...
于弘洋 +5 more
core +2 more sources
, 1980 对于三程以上的折迭管激光器,只有一台电源低压端可以接地,其他电源必须浮置,此时会出现危险的电位升高.本文分析了电位升高的原因,实测了浮置点的电位值 ...
赵笃风 +3 more
core +2 more sources
, 1991 一、概述随着高压和超高压输电线路的发展,传输电压等级越来越高,容量越来越大,电压质量是关键指标之一。线路的安全运行对国民经济的发展起着突出作用。为了减少重大事故的发生,对电力线路的电压监测和准确判断绝缘于好坏显得十分重要。据此,一种新型的测量110kV 及以下的数字式高电压表,已由中国科学院力学研究所研制成功,并由北京高电精密仪器技术公司投入批量生产。SG 系列数字高电压表是测量直流、交流或交直流两用的高压数字仪表,测量范围0.2kV～110kV,测量精度0.5%～2.5%,能自动变换量程 ...
胡昌信
core +2 more sources
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Atomically thin two‐dimensional (2D) materials have emerged as ideal candidates for realizing high‐density, fast switching, and energy‐efficient memristors. However, ultrathin memristive interlayers, particularly at the atom scale, typically suffer from poor endurance and significant variations.
Yujie Bai +12 more
wiley +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Solid oxide electrolysis cell (SOEC) technology is a promising route for efficient and clean green hydrogen production because of its high conversion efficiency and the use of precious‐metal‐free catalysts. However, developing oxygen electrodes that combine high electrochemical activity with robust long‐term operational stability remains ...
Yue Zhao +8 more
wiley +1 more source
Grain Boundary Density Governs the Discharge Behavior of Mg Anodes in Biodegradable Batteries
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Biodegradable magnesium (Mg) alloys have entered clinical use, yet their development as self‐powered absorbable batteries is hindered by poor anode performance, including high self‐corrosion, passivation, and nonuniform dissolution. The role of grain boundary density in governing discharge behavior remains unclear.
Xiaohui Shao +3 more
wiley +1 more source
, 1984 用短路放电法测量电容器分布电感时,常因引线电感及电容引起明显误差;本文介绍了能消减引线电感影响的测量方法。当被试电容量特别小或试验电压高到引线起晕电压时 ...
胡昌信
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, 1984 基于快放电(毫微秒)XeCl激光器电极两端电压和电流的精确测量和计算机分析,给出高气压(3—8大气压力)激光放电等离子体的动态阻抗特性。在几毫微秒内,阻抗降到欧姆量级。研究了放电峰值电流和平均阻抗与充电电压和气体压力的关系。结果显示 ...
刘达伟
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Garnet‐type solid‐state electrolytes (SSEs) are widely regarded as key materials for high‐energy lithium‐ion solid‐state batteries (LSSBs), owing to their compatibility with lithium metal anodes and high‐voltage cathodes. However, their practical application is limited by multiscale degradation processes, including interfacial instability ...
Yan‐Feng Wang +8 more
wiley +1 more source
, 2022 本发明提供一种应用于压电复合纤维的高压驱动器，包括电源电压高电平输入端子、控制信号输入端子、基准电压调节旋钮、高压驱动信号输出端子、高速PWM控制电路、差分信号处理电路和低压转高压逆变电路。其中，电源电压高电平输入端子接收外部电源提供给驱动器，所述控制信号输入端子，接收上位机输出的控制信号，输入信号与电源共地；所述基准电压调节旋钮，调节输出最低电位对地电位差；所述高压驱动信号输出端子，输出高压信号直接驱动压电复合纤维；所述各部分电路呈电性连接，完成低压信号到高压驱动信号的逆变 ...
吴星元 +4 more
core +3 more sources