摘要
差动保护为配电线路下的故障快速精准隔离提供了可靠有效的手段,但传统的光纤通道敷设困难,运维成本高,限制了其在配电网的应用。提出了一种无线通信下的配电线路差动保护设计方案。采用区域自组网技术构建差动保护的通信通道,信息传输不依赖于公共网络传输设备。采用动态定向补偿技术实现各侧数据的精准同步,不依赖于外部对时设备。采用多级安全策略加强网络安全,提高保护业务数据传输及接入的安全性。采用无线通信抗干扰技术避免电磁波干扰,保证数据传输可靠性。通过实验室搭建试验平台进行系统测试,结果表明基于区域自组网的无线通道传输延时短,延时抖动小,数据传输可靠性高,通道及保护功能各项性能指标完全满足配电线路差动保护要求。最后通过试运行验证了该技术具备工程应用推广价值。
Differential protection provides a reliable and effective means for fast and accurate fault isolation of distribution lines. However, traditional optical fiber laying is difficult and operation and maintenance is expensive. This limits its application in a distribution network. This paper presents a design scheme of differential protection for distribution lines under wireless communication. The communication channel for differential protection is constructed by using the technology of a regional ad-hoc network, and information transmission does not depend on public network transmission equipment. Dynamic directional compensation technology is used to realize the accurate synchronization of data on each side, and it does not depend on the external synchronization equipment. A multi-level security strategy is adopted to strengthen network security and improve the security of the service data transmission and access. The anti-interference technology of wireless communication is adopted to avoid electromagnetic interference and ensure the reliability of data transmission. Having set up a test platform in the laboratory for system testing, the results show that the wireless channel based on the regional ad-hoc network has a short transmission delay, small delay jitter, high data transmission reliability. All performance indices of the channel and protection function meet the requirements of differential protection of distribution lines. The value of engineering application and potential popularization of the technology has been verified through trial operation.
作者
刘志仁
薛明军
杨黎明
鲍有理
张涛
张灏
邹磊
康升扬
LIU Zhiren;XUE Mingjun;YANG Liming;BAO Youli;ZHANG Tao;ZHANG Hao;ZHOU Lei;KANG Shengyang(Wuxi Power Supply Branch,State Grid Jiangsu Electric Power Co.,Ltd.,Wuxi 214026,China;Guodian Nanjing Automation Co.,Ltd.,Nanjing 211100,China;Nanjing SAC Automation Co.,Ltd.,Nanjing 211153,China)
出处
《电力系统保护与控制》
CSCD
北大核心
2021年第21期167-174,共8页
Power System Protection and Control
基金
国家自然科学基金青年基金项目资助(51507050)
电机工程学会青年人才托举工程项目资助(CSEE-YESS-2017)。
关键词
区域自组网
无线通信终端
差动保护
保护装置
配电网
regional ad-hoc network
wireless communication
differential protection
protection device
distribution network
作者简介
刘志仁(1984-),男,硕士,高级工程师,主要研究方向为电力系统二次技术,E-mail:liuzhiren30@qq.com;薛明军(1983-),男,硕士,高级工程师,主要研究方向为电力系统继电保护,E-mail:mingjun-xue@sac-china.com;杨黎明(1988-),男,博士,主要研究方向为电力系统继电保护。E-mail:liming-yang@sac-china.com。
