Line parameter identification method based on WAMS system quantity measurement

The invention discloses a line parameter identification method based on WAMS system quantity measurement, belonging to the field of power grid. The invention systematically expounds the equivalent relationship between the measured state quantity of the WAMS system and the line parameter, obtains the parameter value with the smallest error in the multi-solution problem based on the least square fitting, considers the random error that may exist in the single-time measurement, realizes the fitting of the multi-time measurement result, so as to improve the identification accuracy. The invention constructs the equivalence relationship between the measured state quantity of the WAMS system and the line parameters, further considers the random error on the basis of using the least square fittingto solve the single time fitting problem, and puts forward the implementation steps of the multi-time fitting. The concrete fitting method of single time and the further fitting strategy of multi-time identification results