就地化分布式保护环网测试装置研制

Ring network test device development of on-site distributed protection relay

就地化元件保护采用分布式架构,各分布式子机间采用环网通信方式。文中针对子机环网报文的测试难点,设计和开发了具备环网测试功能的新型继电保护测试装置。该装置采用双中央处理器(CPU)架构,主CPU负责测试流程管理,环网CPU负责环网数据交换测试。通过配置文本灵活组帧环网报文,开发延时测试、数据一致性测试、转发特性测试、异常报文模拟等功能,校验环网报文实际传输过程中的可靠性和实时性,补充了环网性能测试手段。文中通过单台测试装置即可完成分布式子机的保护功能及环网性能测试。所研制的装置已应用于就地化保护现场调试,为元件保护就地化实施提供了良好的测试手段。

The protection relays such as transformer relay,busbar relay and so on are installed outdoors which adopt the distributed architecture.And the ring network communication mode is adopted among the distributed slaves.Testing ring network messages is difficult.A new test device is designed and developed,which can fulfill function test of ring network.The device adopts dual central processing unit(CPU)architecture.The master CPU is responsible for testing process management.The slave CPU is responsible for testing the data exchange of ring network.The device can build the ring network messages by configuration file.The devide can finish the following test function,including delay characteristics,data consistency,forwarding characteristics and abnormal message simulation.The reliability and real-time in the actual transmission process of ring network messages can be checked and it can be taken as supplement for the ring network performance test.One device can fulfill function test and performance test of all distributed slaves.The device has been used on-site widely and provides good test method for the protection relays installed outdoors.