Abstract: With the continuous expansion of the power grid scale, on the one hand, new substations are built according to the needs of social development to ensure the safety and reliability of the power grid structure; on the other hand, with the passage of time, the operation life of the equipment grows, a large number of substation secondary equipment life has reached the operating limit, it must be transformed to ensure the reliable and stable operation of the substation, Total Station Integrated Automation technical transformation is a common secondary system transformation mode, it will not affect the power supply, but also can complete the replacement of the equipment, and can effectively improve the operation quality of the storage substations, the reliable operation and security and stability of the power grid are greatly enhanced by the small capital consumption.