Same-frequency and same-phase AC voltage withstand test control system and method

The invention discloses a same-frequency and same-phase alternating current withstand voltage test control system and method. The system comprises a same-frequency and same-phase power supply, a transformer, a voltage divider and an adjustable reactor, the output end of the adjustable reactor is connected with a first line, the first line is connected with a bus I and a bus II of a GIS bus through a second line and a third line, and the first line is connected with a second line. the first line is provided with a transformer, the bus II is connected with a reference voltage input end of a same-frequency and same-phase power supply through a voltage transformer, the first line is provided with a first isolation switch at an input end of a current transformer, two ends of the first isolation switch are provided with grounding isolation switches, the third line is provided with a second isolation switch., and the second line is provided with a third isolation switch. The system can complete the withstand voltage