| with the automation system of Jinghua power grid dispatch as the background this thesis analyzed some disadvantages of traditional data collecting model of automation system, and offers some new ideas and techniques to improve existing data collecting model, through which the reliability of data and the efficiency of collecting data can be improved, besides resource can be saved and workload can be reduced; extending the data net to transformer substations, which can meet the demand of various data's transmission, describe the design of the data net and the protection of automation system ,establish clear levels,security,efficient data collecting model, finally analyzing the benefit of this data collecting model.
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