STATE ESTIMATION METHOD-BASED CALCULATION OF MAXIMUM PERMISSIBLE FLOWS IN MONITORED SECTIONS

Abstract

The PURPOSE of the study is calculation of the maximum permissible flows (MPF) of the controlled sections in the real time mode. The task of MPF determination is performed as a MPF estimation problem when using the method of weighted least squares of the sum of MPF estimation residuals. The desired solution is found by the selection of the weight coefficients of MPF pseudo-measurements (PM). The values of the weight coefficients of MPF PM are determined by the current operating conditions of the electric power system (EPS). METHODS. MPF estimation is based on the method of normal equations and the method of control equations used for solving the estimation problem of EPS state. The methods indicated above were slightly modified for MPF estimation. RESULTS AND THEIR DISCUSSION. The results obtained by the proposed method and the method of successive weighting have been subjected to comparative analysis. When the weight coefficients of the MPF PM are set correctly the MPF values calculated by the two methods coincide with the accuracy that does not exceed the measurement accuracy. CONCLUSIONS. The method of MPF estimation is presented. The measured MPF mode parameters and pseudo-measurements are used as input information. The proposed method enabled to calculate the resulting steady mode with the values of active flows within monitored lines, which are the maximum permissible in the current operating conditions of EPS when mode limitations are observed and all consumer obligations are fulfilled.