With the control mode of value-added network services equipment changing from bypass intervention to serial control, in order to minimize the security problems which are caused by the failure of the network equipment,...With the control mode of value-added network services equipment changing from bypass intervention to serial control, in order to minimize the security problems which are caused by the failure of the network equipment, this paper proposes a stable, fast and intelligent network bypass protection system combined with the ARM embedded system—Linux platform. In practical application, the system can automatically skip the broken-down device node to protect the network to be unobstructed. With the features of fast response, stable operation, low power consumption, and the flexible of combination, the scheme is proved to have large practical value.展开更多
电力系统低碳转型,构建安全高效和灵活可靠的配电网为基础的新型电力系统将对我国“碳达峰、碳中和”目标的实现起到关键作用。文中以低压直流(low voltage direct current,LVDC)配网系统为研究对象,针对配电网低压侧的接地故障问题,提...电力系统低碳转型,构建安全高效和灵活可靠的配电网为基础的新型电力系统将对我国“碳达峰、碳中和”目标的实现起到关键作用。文中以低压直流(low voltage direct current,LVDC)配网系统为研究对象,针对配电网低压侧的接地故障问题,提出了一种采用IGBT构造投切旁路的人体保护方法。文中建立接地故障等效模型并进行理论分析,通过故障阈值识别判据产生保护人体的投切旁路信号,并对不同类型的接地故障进行区分,考虑多支路故障情况对旁路投切保护判据的影响,将故障值范围进行划分,进一步提出了旁路投切的分级保护方案,搭建实物模型对保护方法进行验证。实验结果表明所提保护方法能保护人体安全,具有灵敏性好,安全可控的优点,能显著提高配网系统的运行稳定性。展开更多
为解决作业工具管理与使用效率不高的问题,提高配网不停电作业精益化工作水平,以某市10 k V配电线路检修改造项目为例,介绍了配网不停电作业的适用范围与技术难点,结合工程实际情况,分析了传统电缆挂板装置存在的弊端,进而对旁路作业绝...为解决作业工具管理与使用效率不高的问题,提高配网不停电作业精益化工作水平,以某市10 k V配电线路检修改造项目为例,介绍了配网不停电作业的适用范围与技术难点,结合工程实际情况,分析了传统电缆挂板装置存在的弊端,进而对旁路作业绝缘挂板进行优化改造,提出具体的设计目标与装置构造方案。此外,为保证其使用效果,还开展了工具管理及试验工作,有效提高了配网不停电作业实施成效。展开更多
文摘With the control mode of value-added network services equipment changing from bypass intervention to serial control, in order to minimize the security problems which are caused by the failure of the network equipment, this paper proposes a stable, fast and intelligent network bypass protection system combined with the ARM embedded system—Linux platform. In practical application, the system can automatically skip the broken-down device node to protect the network to be unobstructed. With the features of fast response, stable operation, low power consumption, and the flexible of combination, the scheme is proved to have large practical value.
文摘电力系统低碳转型,构建安全高效和灵活可靠的配电网为基础的新型电力系统将对我国“碳达峰、碳中和”目标的实现起到关键作用。文中以低压直流(low voltage direct current,LVDC)配网系统为研究对象,针对配电网低压侧的接地故障问题,提出了一种采用IGBT构造投切旁路的人体保护方法。文中建立接地故障等效模型并进行理论分析,通过故障阈值识别判据产生保护人体的投切旁路信号,并对不同类型的接地故障进行区分,考虑多支路故障情况对旁路投切保护判据的影响,将故障值范围进行划分,进一步提出了旁路投切的分级保护方案,搭建实物模型对保护方法进行验证。实验结果表明所提保护方法能保护人体安全,具有灵敏性好,安全可控的优点,能显著提高配网系统的运行稳定性。
文摘为解决作业工具管理与使用效率不高的问题,提高配网不停电作业精益化工作水平,以某市10 k V配电线路检修改造项目为例,介绍了配网不停电作业的适用范围与技术难点,结合工程实际情况,分析了传统电缆挂板装置存在的弊端,进而对旁路作业绝缘挂板进行优化改造,提出具体的设计目标与装置构造方案。此外,为保证其使用效果,还开展了工具管理及试验工作,有效提高了配网不停电作业实施成效。