Implementation of Sate Estimation Program in North- West Dispatching Center of Iran

In this paper, the results of providing and implementation of the state estimation (SE) program and also input/output required information has been presented for the first time in North-West dispatching center of the country. The SE program has been written based on weighted least square (WLS) in the MATLAB software and is able to estimate amplitudes and phase angles of all 132kV, 230kV and 400kV power stations voltages in North-West region of country, every instant. Moreover, in order to convert the measured information and identify the close/open status of the power stations circuit breakers, a special program was written in the C++ software. This program delivers the mentioned information in a desired order to the SE program, in each program execution cycle. Output of the proposed SE program provides two options for the experts and operators of the dispatching center. In the first option, output of SE program can be used in the form of a special monitoring system unsig Bitmap figures without using any other programs. While for the second option, SE program output is imported to the well-known DIgSILENT software using a special input script data file, which can be presented with the DIgSILENT software and used for the other of power network calculations.