Analysis of Measurement Data in a Direct Current Traction Power-Supply System with Uncontrolled Rectifiers

Abstract

Measurement data on the traction load and voltage of uncontrolled rectifiers of 3.3-keV traction substations have been considered, and theoretical distribution laws for traction load and voltage and homogeneity in a series of observed values have been given. Traction substations located in areas with different track profiles under conditions of traffic organization with heavy-weight long trains are examined. The measured traction and voltage curves for 3.3-keV tires of dc traction substations of RZD holding are presented. The Gaussian distributions are shown to be unsuitable in describing the observed values. The Johnson distributions are analyzed, being most suitable to describe the observed electrical quantities. The observed voltage frequencies and traction loads are compared according to distributions of cumulative frequencies. The difference in variations of the cumulative frequencies for traction substations located in the regions with different path profiles is demonstrated. To confirm the difference in experimental data of traction substations, a daily Kolmogorov test has been used.