  Power System State Estimation (PSSE) has been a research area of interest for
power engineers for a long period of time. Due to the intermittent nature of
renewable energy sources, which are applied in the power network more than
before, the importance of state estimation has been increased as well.
Centralized state estimation due to the complexity of new networks and growing
size of power network will face problems such as communication bottleneck in
real-time analyzing of the system or reliability issues. Distributed state
estimation is a solution for the mentioned issues. There are different
implementation methods introduced for it. The results of the paper are twofold.
First, we examined different approaches to distributed PSSE (DPSSE) problem,
according to most important factors like iteration number, convergence rate,
data needed to be transferred to/from each area and so on. Next, we proposed
and discussed a new distributed stopping criterion for the methods and
above-mentioned factors are obtained as well. Finally, a comparison between the
total efficiency of all applied methods is done.
