Natural gas system and power system emergency combined scheduling method and device

The invention discloses a natural gas system and power system emergency combined scheduling method and device, and the method comprises the steps: adjusting the output plan of each set when a power grid has a fault, checking the transmission limit value of the line power flow, carrying out the loop iteration till the transmission limit value of the line power flow is passed, and determining an output plan of a gas set; enabling a gas network side to carry out the checking of the total gas supply according to the output plan of the set, returning a checking result to the power grid side till the checking is passed, checking pipe network transmission of a natural gas system, and returning a result to the power grid side till the checking is passed; Enabling the gas network to check whether the total gas supply and a pipe network transmission system meet the demands of a gas turbine set when the gas network has a fault, and returning a checking result to the power grid for iteration till the total gas supply and