Immunoproteasome
Immunoproteasome
复制标题
DOI：
10.1002/9780470015902.a0026244
复制
发表时间：
2020-05
期刊：
影响因子：
--
通讯作者：
Hiroaki Kimura
中科院分区：
文献类型：
--
作者：
Hiroaki Kimura
在直流电气化铁路中，电压产生于铁轨和大地之间，即，铁路潜力为了将电压保持在国际标准IEC 62128规定的允许电压极限以下，在铁路供电设备中增加了电压限制装置（VLD）。VLD是一种连接铁路和大地的开关。当轨电位上升到允许电压以上时，开关闭合。这降低了轨电位的电压，因为轨和地被闭合的开关短路。为了评估VLD对轨道电位计算的影响，在轨道电位计算模型中增加了VLD模型。VLD被建模为可变电阻，其根据开关的打开/闭合状态来改变电阻值。一旦轨道和地之间的电压超过预定义的限制，状态将变为关闭，并在重新打开之前保持关闭预定义的时间。实例分析结果表明，通过关闭多个安装在线路上的VLD，轨道电位几乎降低到零。然而，杂散电流增加，因为它流过闭合的VLD。从实际路线获得的结果将在未来的工作与模拟结果进行比较。
In DC electric railways, voltage is generated between rail and earth, i.e., rail potential. To keep the voltage below the permissible voltage limit specified by the international standard IEC 62128, a voltage limiting device (VLD) is added to railway power supply equipment. A VLD is a switch that connects the rail and the earth. The switch is closed when the rail potential rises above a permissible voltage. This lowers the voltage of the rail potential because the rail and the earth are shorted by the closed switch. We added a VLD model to a rail potential calculation model to evaluate the VLD's affection. The VLD was modeled as variable resistance that changed the resistance value depending on the open/closed status of the switch. Once the voltage between the rail and the earth exceeds the predefined limit, the status changes to close and stays closed for a predefined time before it is reopened. The results of the case study show that rail potential is reduced to almost zero by closing multiple VLDs installed in the line. However, stray current increases because it flows through the closed VLDs. The results obtained from the actual route will be compared with the simulation results in future work.