Simulation and Analysis of WLS and back propagation based Power System State Estimation using MATLAB
Keywords:
State Estimation, Weighted Least Square (WLS), Normal Equation Method, Back propagation Algorithm, Newton Raphson (N_R)Abstract
As the power system grows larger and more complex, real time monitoring and control becomes vital in order to
achieve a reliable operation of the power system. Especially, with world wide restructuring of the power industry, power system
state estimation has got more importance as a real time monitoring tool. Because of the open access and the operation of the
transmission networks, the patterns of power flow in deregulated power system have become less predictable compared to the
integrated systems of the past. In order to achieve a more secure and economic operation of such a complicated system, utility
operators are to be properly informed of the operating condition of the current power system. Hence real time monitoring of
system is an extremely important part of the modern day Energy management system or energy control centers.
In this paper, a new fundamental WLS based Static State Estimation technique Back propagation is used which is far better
than WLS based Normal Equation method. Furthermore, comparative analysis of both WLS based techniques has been taken out
for various operating situations of the power system. For the verification of both the algorithms IEEE-14 bus test case system is
utilized and results are carried out using m.file in MATLAB software.
