Station yard combustible gas leakage protection system and method

The invention discloses a station yard combustible gas leakage protection system and method, and belongs to the technical field of gas well exploitation. The station yard combustible gas leakage protection system comprises a plurality of wellhead safety hydraulic cut-off devices, an oil storage tank, a remote terminal unit, a plurality of control loops, a plurality of combustible gas detectors and a plurality of execution mechanisms; the executing mechanism is connected with the wellhead safety hydraulic cut-off device and the oil storage tank through pipelines, the combustible gas detector and the executing mechanism are in communication connection with the remote terminal unit through the control loop, cut-off of a gas source is achieved, the structure is simple, closing is rapid, and meanwhile the safety of the gas source is guaranteed. Through communication connection between the remote terminal unit and the execution mechanism, the situation that if interlocking failure occurs, an operator can manually a