SYSTEM FOR SUPPLYING POWER DURING TRAVEL, AND METHOD FOR DETERMINING ABNORMAL VALUES OF ELECTRICAL CHARACTERISTICS OF SAID SYSTEM

An in-motion power supply system 100 includes a plurality of power supply segments SGs configured to supply power to a vehicle 202, a vehicle position detection unit 20 configured to detect a position of the vehicle relative to each segment, an electrical characteristic acquisition unit 50 configured to acquire electrical characteristics in the segment involved in power transfer, and an abnormality determination unit 54 configured to use the electrical characteristics to determine whether there is an abnormality in the segment involved in power transfer. The abnormality determination unit shares the electrical characteristics between a subject segment SGt subjected to abnormality determination and at least one of a previous segment SGb previous to the subject segment and a subsequent segment SGa subsequent to the subject segment, and compares the electrical characteristics in the subject segment with at least either the electrical characteristics in the previous segment or the electrical characteristics in the subsequent segment to determine whether the electrical characteristics in the subject segment are abnormal.