LINE FLOW BASED WLS STATE ESTIMATION TECHNIQUE WITH BAD DATA MEASUREMENTS USING WIPSO ALGORITHM

State estimation techniques are generally used by all the utilities to make the best possible estimate of the current system state from the existing set of redundant measurements. Conventional estimates usually generating bus voltage magnitudes and angles which need to be converted later into line loadings to perform security analysis. Here a novel line flow based state estimation technique which offers the output in terms of real and reactive power flows, and bus voltage magnitudes has been developed and solved using WIPSO algorithm. The proposed method when implemented on standard test systems in the presence of various percentages of bad measurements has been detected to provide better results than the conventional WLS technique in terms of normalized error values and net computation time.