An Efficient State Estimation Method Through Transformations

Publisher Website
Google Scholar
Abstract
Result of tests on a radial system show the importance of voltage magnitude and zero injection measurements in the identifica- tion of gross errors in the state estimation problem. Computational efficiency is enhanced by the use of a transformed set of measure- ments. Zero injections are handled such that the matrix used in the estimation process has an admittance like structure. All voltage magnitude measurements are included as random variables and no deterministic voltages are used. Weighting factors are analysed and appropriate values are recommended in order to obtain adequate convergence characteristics. The filtering capabilities of the estimator are tested and the results obtained discussed. Result of extensive tests on two systems part of the 230/400 KV Mexican Network are summarized in tables. Line flow and voltage measurement gross errors were simulated and the importance of the location of measured nodal quantities in the identification process reported. Common error identification problems between radial and meshed systems are also discussed.

This publication has 7 references indexed in Scilit: