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目前，国内大部分变电站系统网络与计算机设备缺乏安全准入监测功能，对于接入各层网络进行运维调试的设备以及系统内各台计算机上的U盘设备尚没有规范的管控手段。为了保障变电站网络及业务系统安全运行，遵照IEC61850规约，在分析智能变电站分层式结构的基础上，研发一种变电站安全准入系统，通过MMS协议实时上传网络设备及U盘拔插的监视信息至位于站控层的主站客户端。经过在南方电网公司的现场测试，该系统运行稳定符合预期，从源头上保证了变电站系统运行的安全性。
At present, most domestic substation network and computer equipment lack of security access monitoring functions, access to all levels of network operation and maintenance of equipment and systems within the computer U disk device does not regulate the control measures. In order to ensure the safe operation of substation network and business system, in accordance with the IEC61850 protocol, based on the analysis of the hierarchical structure of intelligent substations, a substation security access system is developed to upload real-time monitoring information of network devices and U disk unplugged through MMS protocol To the master station located in the station control client. After the field test conducted by China Southern Power Grid Corporation, the system was in stable operation as expected, ensuring the safety of substation system operation from the source.