摘要
5G无线网络为配电网差动保护提供了低成本承载方案,同时也带来了无线网络攻击的威胁。考虑到外部攻击入侵配电网后系统易因线路跳闸而崩溃的问题,提出一种中压直流配电网的差动故障保护方法。所提方法能够检测与物理故障同时发生的配电网相邻线路上的外部网络入侵,进行模态变换以获得系统部署的限流电抗器两端的线模式和零模式电压。仿真结果表明,所提方法对高阻抗故障具有较高的敏感性,同时具有良好的保护性能,能够有效提升5G无线网络环境下配电网差动保护业务的安全性。
The fifth generation(5G)wireless network not only provides a low-cost bearing scheme for the differential protection service of distribution network,but also poses a threat of wireless network attacks.Considering the issue of system collapse due to line tripping after external attacks invade the distribution network,a differential fault protection method for medium voltage DC distribution network is proposed.The proposed method can detect the external cyber intrusions on the adjacent lines of the distribution network where the physical fault occurs at the same time.The modal transformation is conducted to obtain the line mode and zero mode voltage of the current limiting reactor deployed by the system.The simulation results show that the proposed method has high sensitivity to high impedance faults and good protection performance,which can effectively improve the security of differential protection services in distribution networks in 5G wireless network environments.
作者
郭乐欣
胡佳新
周建勇
王廷凰
许健
GUO Lexin;HU Jiaxin;ZHOU Jianyong;WANG Tinghuang;XU Jian(Shenzhen Power Supply Co.,Ltd.,Shenzhen 518000,China;Beijing Sifang Automation Co.,Ltd.,Beijing 100085,China)
出处
《电器与能效管理技术》
2023年第6期63-69,共7页
Electrical & Energy Management Technology
关键词
差动保护
配电网
5G
安全防护
虚假注入
differential protection
distribution network
5G
security protection
false data injection
