A Novel Portrait Technology-Based Modeling and Alarm Tagging Method for SDH Device in Smart Grid.

SDH(Synchronous Digital Hierarchy) device is a crucial data transmission device in the electric power communication network in the smart grid. During the device running time, there are problems such as difficulty in alarm analysis and locating faults, which affect the regular operation of the services. To transform the massive and multi-source data of the device into an intuitive tag form, extract the typical characteristics of the device from the data, and provide a precise guidance strategy for the maintenance of the SDH device, portrait technology is adopted to carry out modelling analysis of the device. A tag system and a overall technical framework for SDH device are proposed. A new method for alarm sequence analysis is proposed, based on the sequential pattern mining algorithm is used to analyze the alarm log and tagged them.