Gas-steam combined cycle unit simulation method suitable for various types and working conditions

The invention discloses a gas-steam combined cycle unit simulation method and system suitable for various types and working conditions, and the method comprises the steps: carrying out the partitioning of a unit connection mode based on the node name and voltage grade of each generator, and determining the type of a combined cycle; initialization is carried out based on the combined cycle type, and an energy utilization coefficient between waste heat and heat of a gas turbine model is determined; the gas turbine model outputs gas turbine mechanical power of a gas turbine part based on the energy utilization coefficient and injects the gas turbine mechanical power into a first generator, and residual heat is fed into the steam turbine model through a waste heat boiler; the steam turbine model gives steam turbine mechanical power of a steam turbine part and injects the steam turbine mechanical power into the first generator or the second generator. The method can meet the requirements in engineering application