The benefit calculation of gas-steam combined cycle units should be based on reasonable allocation of heat and power costs. This paper proposes a new heat and power cost allocation method

which uses big data analysis methods to fit the gas consumption curve of the unit in various operating modes. Considering the market power supply price

heating price

natural gas price

fixed cost and auxiliary power consumption

a thermal power cost allocation model is established in multiple operation modes of combined cycle units. This thermoelectric cost sharing model can calculate the real-time economic benefits of the unit

and obtain the real-time power supply and heating profit balance point and the thermoelectric conversion ratio curve of the unit based on the gas consumption curve of the unit. On this basis

the real-time optimal power generation and heating output operation optimization plan of the unit is given

and the maximum power generation of the unit under the fixed heat supply is analyzed. It can be used as a reference for operators during deep peak shaving of the unit.