Electricity-gas coupled comprehensive energy system carbon emission monitoring method

The invention discloses an electricity-gas coupled comprehensive energy system carbon emission monitoring method. The method comprises the following steps: S1, calculating system power flow; s2, generating a branch power flow distribution matrix PB, a unit injection distribution matrix PG, a load distribution matrix PL and a node active flux matrix PN; s3, whether the absolute value of the node active flux matrix PN is equal to 0 or not is judged, if yes, the corresponding node of the row where the diagonal element is 0 in the PN and the unit and the line connected with the corresponding node are removed from the power grid, the steps S2 to S3 are repeated, and if not, the step S4 is executed; s4, calculating a power grid node carbon potential En and a gas network node carbon potential Egas.n; s5, calculating carbon flow distribution of power grid branches and loads and calculating a gas network carbon emission flow model; and S6, reducing and distributing to each energy hub EH. The method has the beneficial