基于5G和光纤综合通道的输电线路差动保护方法

现有输电线路差动保护均基于光纤通道设计,其通道要求高,限制了双通道三路由的推广应用.另外,现有差动保护不具备识别通道路由延时不一致的能力,存在差动误动的风险.从数据格式、采样同步、同步监测、网络安全等方面研究了对通道要求降低的输电线路差动保护解决方案,并提出了基于5G和光纤综合通道的线路差动保护方法.重点研究了基于数据...

A transmission line differential protection method based on 5G and optical fiber integrated channels

Existing transmission line differential protection is designed based on an optical fiber channel. It has high channel requirements which limit the popularization and application of dual channel and three route. In addition, the existing differential protection does not have the ability to identify inconsistent channel routing delays, resulting in the risk of differential protection misoperation. This paper studies transmission line differential protection with reduced channel requirements from the aspects of data format, sampling synchronization, synchronous monitoring and network security. It puts forward a line differential protection method based on 5G and an optical fiber integrated channel. The focus is on a synchronization method based on the improvement of the reliability of the data channel and on the external synchronization clock, and the real-time synchronization monitoring strategy of multi-mode data to realize the synchronization. Through the simulation test, the method realizes routable differential data processing, reduces the requirements of differential protection for the channel, monitors the sampling synchronization status in real time, improves the reliability of differential protection, and is conducive to the popularization and application of dual channel and three route.This work is supported by the Science and Technology Project of State Grid Corporation of China (No. SGHD0000DKJS2000106).