Abstract: This paper proposes a control strategy for a remote standby automatic transfer system to enhance the power supply security of small-scale distribution networks with a two-station single-chain power supply structure.This strategy is based on a peer-to-peer communication control mode without a master, utilizing millisecond-level real-time interaction information to automatically identify open points, locate faults, rapidly isolate faults, disconnect small power sources, restore power supply, and automatically identify and lock out load-shedding from the stable system.It also leverages the unified low-voltage standardized device hardware from the State Grid Corporation without changing the definition of the interface, such as input, output, analog, and power, while adding a dedicated communication module to the CPU board.This model reduces cost and facilitates on-site construction and upgrade transformations.Both RTDS simulation tests and field applications verify the effectiveness of this control strategy, offering insights into similar studies for other regions with comparable grid structures.