Feasibility Study of Running State Estimation Software in a Large Power System with a Very Weak RTU Coverage Condition

Real-time security monitoring is very important for large scale power systems. In the power systems with weak RTU coverage, state estimation software will not work, therefore realtime security monitoring is not possible. This paper deals with finding some practical and feasible solutions to make state estimator program available for large scale power systems with a very weak RTU coverage condition. Different aspects of state estimation such as topology extraction and observability problems are studied for Iran power system and a proposed methods to overcome the problems such as using transformer tap estimation, network model reduction and external model are presented.