Network parameter errors are important factors influencing the accuracy of state estimation results. Based on weighted least square state estimation

the influence of bad data and error parameter set on gross error is analyzed and the successive identification method of network parameter and measurement errors based on gross error reduction index is proposed. Along with the ability to identify multiple network parameter and measurement errors simultaneously

this method is equivalent to the normalized Lagrange multiplier method for a single parameter or measurement error identification. The identification results of IEEE 14-bus test system verify the accuracy and superiority of the proposed identification method. This work is supported by National High Technology Research and Development Program of China(863 Program)(No. 2011AA05A118).