变电站状态监测通信网关中Modbus与IEC61850的映射方法

An Approach to Mapping Between Modbus and IEC 61850 for Condition Monitoring Communication Gateway in Substations

针对目前变电站已经部署了大量常规状态监测装置的实际现状,指出采用状态监测通信网关是解决常规状态监测装置接入智能变电站状态监测系统的有效方法。通过对Modbus与IEC61850模型的分析,提出Modbus与IEC 61850的模型映射方法,包括IEC 61850对象引用与Modbus地址的映射、公共数据类型与Modbus参数类型的映射、抽象通信服务与Modbus协议数据单元的映射。文中给出了通过对现有系统配置描述语言模式文件进行扩充的模型映射实现方案,可以避免配置工具间交换配置信息造成歧义性,并为电力电容器状态监测建立了一个模型实例,以验证上述方法的正确性和可行性。

In view of the status quo of deployment of large numbers of conventional condition monitoring equipments in current substations,it is pointed out that using communication gateway of condition monitoring is an effective method for conventional condition monitoring equipments to be connected into the new condition monitoring system in smart substations.Based on an analysis of Modbus and IEC 61850,a model mapping approach to Modbus and IEC 61850 is proposed,in which,the object reference of IEC 61850 is mapped onto the address of Modbus,common data class of IEC 61850 is mapped onto the parameter type of Modbus,and abstract communication service of IEC 61850 is mapped onto the protocol data unit of Modbus.An implementation scheme of model mapping by expanding the existing schema file based on system configuration descriptive language is proposed,which can avert ambiguity in information interchange between configuration tools.A model is developed as an instance of condition monitoring for the power capacitor to verify the validity and feasibility of the mapping approach proposed.