Abstract
Smart grid is a new direction for the development of my country’s power industry. Relay protection, as the first line of defines to ensure the safe operation of the power grid, needs to actively adapt to the power grid reform. The thesis first introduces the related technologies of relay protection, and proposes a fault diagnosis method for distribution network based on the characteristics of the sequence information of relay protection. Finally, the simulation of electromagnetic transient and diagnosis method is carried out on the PSCAD platform, and the results of calculation examples verify the accuracy and effectiveness of the diagnosis method.
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