Development and Application of Parameter Estimation Software Integrated into EMS

A practical scheme for parameter estimation is designed and integrated into an Energy Management System (EMS), in which the fundamental thought of analyzing parameter problem by compensation components of power flows in suspicious branches that was proposed by Felix F. Wu and others is adopted and the parameter estimation is divided into two parts, i.e., the identification of suspicious branches based on residual error sensitivity and the parameter estimation based on least squares method. Combining with the features in actual operation of EMS, some special problems in application are researched, and effective and feasible solutions are put forward, at the same time the reuses of both information and code of original EMS are considered. Using this solution, application program is worked out and case study is conducted. The feasibility of the solution is verified by test results. The developed software based on the proposed scheme is applied to domestic provincial power grid and the accuracy of state estimation is effectively improved.