METHOD FOR ANALYZING ASSOCIATION BETWEEN RAIL TRANSIT AND TRANSFORMER DIRECT-CURRENT MAGNETIC BIAS

A method for analyzing association between rail transit and transformer direct-current magnetic bias, comprising the following steps: A, acquiring the magnitudes of feed cable currents and direct-current magnetic bias currents: measuring, by means of a monitoring device, the magnitudes of rail transit feed cable currents and power grid transformer direct-current magnetic bias currents within a certain period; B, on the basis of the feed cable currents acquired in step A, calculating characteristic quantities of the feed currents within the measurement period; C, according to the direct-current magnetic bias currents acquired in step A, calculating characteristic quantities of the direct-current magnetic bias currents within the measurement period; and D, according to the characteristic quantities of the feed currents and the direct-current magnetic bias currents calculated in step B and step C, calculating support levels and confidence levels, and generating an association rule. The association analysis method provided in the present method can provide a basis for analyzing the effect of rail traffic on power grid transformer direct-current magnetic bias.