Abstract: There are parameter identification errors in the process of distribution network synchronous

measurement configuration. The optimal configuration method of distribution network synchronous measurement

device based on parameter identification accuracy was studied. Based on the measurement data of the synchronous

measurement device，the branch parameters of the whole distribution network were estimated step by step from the end node of the distribution network，and the line parameters at different times in the operation process of the

distribution network were determined by using the least square algorithm. According to the sensitivity of the

measurement noise，the dispersion index was determined，and the internal parameters of the synchronous

measurement device configuration algorithm were constructed with the comprehensive optimization of the

identification accuracy and configuration quantity as the goal. According to the standard of parameter identification

accuracy and configuration quantity of distribution network，the optimal configuration scheme of synchronous

measurement device with the minimum objective function was obtained. The experimental results show that the

identification mean error of node voltage is small，which is controlled between 0.10% and 0.26%，which can

significantly reduce the parameter identification error of the research object.

      Key words: parameter；identification accuracy；distribution network；synchronous measurement device；

optimal configuration