Distribution network state estimation based on node voltage of variable weights

The weighted least squares estimation is often used in distribution state estimation, which is characterized by weights fixed, but without robustness. In this paper, we revise the weights according to residual changes of iterations. This method employs node voltage magnitude and phase angle as state variables. A distribution network is considered to test variable weights method as an example. The results show that the method can remedy the defects of fixed weights method, and have a better effect on anti-error.