Method for measuring temperature of conductors of three-core cable

The invention discloses a method for measuring the temperature of conductors of a three-core cable, comprising the following steps of: (1) laying temperature measurement optical fibers in an enclosed area formed by metal shielding layers of three wire cores of a three-core cable; and (2) taking a temperature obtained from measurement as the temperature of conductors of the three wire cores of the three-core cable. According to the invention, the temperature of the conductors of the three-core cable in steady or transient state can be accurately measured by laying the temperature measurement optical fibers in the enclosed area formed by the metal shielding layers of the three wire cores of the three-core cable, the measurement process is more direct, and the measurement result is more accurate.