变压器微机保护的IEC61850改造研究

Research on IEC 61850 transformation of microcomputer-based transformer protection

变电站数字化改造中需对传统的微机保护装置进行IEC61850升级改造。以变压器微机保护为例,在硬件上增加了通信模块,使其具有网络化的功能;在软件上对变压器保护进行功能分解和逻辑节点确定,新建了IEC61850中没有定义的瓦斯保护逻辑节点类PGAS,分析了差动保护的具体实现流程。构建了IEC61850服务器模型,完成了变压器微机保护装置的IEC61850数据建模,使其符合IEC61850通信标准。改造方法简单,成本低廉,适应现阶段的数字化变电站,具有较好的参考意义和应用价值。

It is necessary to update the traditional microprocessor-based protection device to meet IEC 61850 in the transformation of digital substation. Taking the transformer protection as an example, this paper adds communication module to original hardware to realize network function. In the software, transformer functions are decomposed and identified by corresponding logic nodes; gas protection logic node class PGAS, which is not defined in IEC 61850, is newly developed; implementation process of differential protection is concretely analyzed; finally IEC 61850 server model is constructed, thus completing IEC 61850 data modeling of microcomputer-based transformer protection, which meets IEC 61850 standard. The transformation is simple, cheap and adaptable to current digital substation, with good reference significance and application value.