图论在智能变电站二次安全措施中的应用探索

Application of Graph Theory in Safety Measures of Secondary System in Smart Substation

针对智能变电站二次系统的高度网络化,使得二次设备间的信息交互关系隐含不可见,给检修安全措施工作带来不便的问题,探索了图论在智能变电站二次安全措施中的应用。首先为获取二次系统中的虚回路配置,采用文档对象模型(document object model,DOM)对变电站配置描述(substation configuration description,SCD)文件进行读取和解析;接着引入图论知识建立用于表达智能电子装置(intelligent electronic devices,IED)信息交互关系的网络拓扑模型,并根据检修任务对IED进行检修状态区分,建立IED状态矩阵,最后在上述基础上,结合链路安全措施规则,实现安全措施策略的辅助分析,给出安全措施执行意见。以东岗变500 kV的5032中断路器首检为例,验证了该方法在二次检修安全措施工作中的有效性和正确性。

Due to high degree networking of the secondary system of smart substation,the information exchange relationship of secondary equipment is hidden and invisible,causing inconvenience in the work of maintenance safety measures.This paper explores the application of graph theory in secondary system safety measures of intelligent substation.Firstly,in order to obtain the virtual circuit configuration of the secondary system,this paper uses document object model(DOM)to read and analyze substation configuration description(SCD)file.Secondly,a network topology model expressing the information interaction relationship of intelligent electronic devices(IEDs)is established using graph theory knowledge,and a status matrix of IEDs is established by distinguishing the maintenance status of IEDs according to maintenance task.Finally,combined with link security measure rules,an assistant analysis model of security measure policy is established,and the implementation suggestions of security measures are given.This paper takes the first inspection of a 500kV circuit breaker in Donggang substation as an example,and effectiveness and correctness of the method in secondary maintenance safety measures are verified.