This paper takes the coal-fired cogeneration unit as the research object

takes into account the participation of power station in the electric energy market

the FM standby auxiliary service market

the heat market

the by-products trading

as well as the fuel cost of the unit’s power generation

the unit’s operating characteristics and other key influencing factors

and constructs the optimization model of the power station’s multi-unit coordinated operation strategy under the electric power spot mode

which will help the power plant enterprises to realize the maximization of the operating profit of the coal-fired and gas-fired cogeneration enterprises.Through the model study of this paper

coal-fired and gas-fired cogeneration enterprises can optimize the decision-making on the combination of start-up and output allocation of the units in the enterprise according to their own units and real-time changes in the price of electricity

so as to achieve the maximization of the comprehensive energy efficiency of multi-supply of electricity

heat

gas

ash

gypsum

slag

etc

and to enhance the enterprise’s competitiveness in the market and value creativity.This paper finally verifies the effectiveness of the model through the arithmetic example measurement of data from actual power generation enterprises.