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针对设备自动化实时用以太网(EPA)标准在智能变电站系统应用时的网络冗余问题,分析了分布式冗余协议(DRP)的通信机理及故障检测和恢复机制。研究并设计了应用于处理智能变电站系统中链路故障恢复的环网模块。在实际智能变电站系统中,通过测试验证表明,与基于环网的媒体冗余协议(MRP)和并行冗余协议(PRP)的冗余方案相比,以DRP为基础设计的环网模块更能保证环网链路故障后的自愈修复,且满足基于EPA的智能变电站的自愈时间要求。
Aiming at the problem of network redundancy in the real-time Ethernet (EPA) standard of equipment automation in the application of intelligent substation system, the communication mechanism of distributed redundancy protocol (DRP) and fault detection and recovery mechanism are analyzed. The ring network module which is used to deal with the link fault recovery in the smart substation system is researched and designed. In the actual smart substation system, the test verifies that the DRP-based ring network module is more capable than the MRP and Redundancy Protocol (PRP) redundancy schemes Guarantee the self-healing repair after ring network link failure, and meet the self-healing time requirement of EPA-based smart substation.