Centralized normalization of harmonic voltages in the supply network for traction substations

Abstract

The paper solves the problem of centralized reduction of harmonic voltages at the nodes connecting traction substations on railway to the supply HV network via the passive C-type filters. The results of measurements at the connection nodes of traction substations to the supply network of the voltage quality indices that are due to non-sinusoidality are presented. Changes of the indices at different configurations of the supply network are analyzed. Mathematical expressions to determine parameters of the C-type filters, the algorithms for selecting network nodes where they will be installed are given. The parameters of the selected nodes for 220 kV network supplying traction substations with power and also the estimates of the efficiency of work of these filters for different network configurations are presented as an example. The active power losses in the selected filters are calculated.