摘要
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通道可靠性提升的同步方法、基于外部同步时钟的同步方法和多模式数据实时同步监测策略,实现综合通道差动保护同步。通过仿真试验,基于5G和光纤综合通道的输电线路差动保护方法,实现了可路由的差动数据处理,降低了差动保护对通道的要求,对采样同步状态进行实时监测,提高了差动保护的可靠性,有利于双通道三路由的推广应用。
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 5 G 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.
作者
娄为
韩学军
韩俊
陆金凤
李奔
赵青春
徐晓春
LOU Wei;HAN Xuejun;HAN Jun;LU Jinfeng;LI Ben;ZHAO Qingchun;XU Xiaochun(East China Branch,State Grid Corporation of China,Shanghai 200000,China;NR Engineering Co.,Ltd.,Nanjing 210000,China)
出处
《电力系统保护与控制》
CSCD
北大核心
2022年第1期158-166,共9页
Power System Protection and Control
基金
国家电网公司科技项目资助(SGHD0000DKJS2000106)。
关键词
差动保护
5G
光纤
综合通道
同步
differential protection
5G(5th generation mobile networks)
optical fiber
integrated channels
synchronize
