Transformer substation time synchronization fault positioning method

The invention discloses a transformer substation time synchronization fault positioning method. The problem that in the prior art, only whether transformer substation time is synchronous or not can be judged, and specific fault positions or fault reasons cannot be determined is solved. The method comprises the following steps: S1, constructing a transformer substation time synchronization system, wherein the time synchronization system comprises a satellite, a clock source, a switch and a plurality of secondary devices which are in communication connection in sequence; S2, enabling the substation secondary equipment to obtain satellite time, and performing time synchronization; and S3, enabling the secondary equipment to judge whether time synchronization succeeds or not, and if so, time synchronization ends, and if not, all links of the time synchronization process are analyzed in sequence, judging the fault position. All links of time synchronization are judged in sequence, the range of the time synchroniza