Abstract: A wind turbine auxiliary power system configured to receive electrical power from an electrical power generating system of the wind turbine or from a power grid. The auxiliary power system includes an auxiliary transformer having a primary side configured to be coupled to the electrical power generating system of the wind turbine and a secondary side configured to be coupled to auxiliary power consumers of the wind turbine and to provide transformed electrical power to the consumers. It further includes an electronic on-load tap changer provided on the auxiliary transformer, wherein the electronic on-load tap changer includes taps on at least one transformer winding of the auxiliary transformer and semiconductor switches that are coupled to the taps and that are configured such that by controlling the semiconductor switches, the transformation ratio of the auxiliary transformer is adjustable to compensate for voltage variations on the primary side of the auxiliary transformer.

Abstract: The present aspects refer to a method for prioritizing railway crossing flows comprising: defining residence location nodes, daily-activity location nodes and level crossing nodes within a zone of influence; generating a graph comprising the residence location nodes, daily-activity location nodes and level crossing nodes and a set of edges, wherein said edges connect the residence location nodes, daily-activity location nodes and level crossing nodes, generating a connected component containing residence location nodes, daily-activity location nodes and level crossing nodes; and obtaining a vector comprising the level crossing nodes in descending order of the value assigned to each level crossing node. The present aspects also refer to a memory storage medium comprising computer-executable instructions for implementing a method for prioritizing railway crossing flows.