Under the policy of peak shaving and carbon trading

cogeneration units face a more complex background. In order to obtain the carbon emission characteristics

income distribution and carbon trading economy of the traditional extraction condensing cogeneration unit under all operating conditions

and provide a reference for the unit to deal with carbon market fluctuations when participating in carbon trading. Using EBSILON simulation software combined with python program

the carbon emission distribution and income composition of the unit under all operating conditions are obtained. The research results show that the carbon emission kilowatt hour is inversely proportional to the load. Taking 325 MW and 150 MW as examples

the carbon emission intensity of power supply increases from 903.54 g/(kW·h) to 1 015.28 g/(kW·h)

and the total carbon emission is proportional to the load; The highest proportion of peak shaving income can reach 55%; The highest proportion of carbon trading income can reach 8%

and the peak shaving income accounts for a large proportion in the low load

while the carbon trading income accounts for a large proportion in the high load. Comparing the change of carbon price from 40yuan/t to 90 yuan/t and the change of power supply carbon emission standard from 0.9 times to 1.3 times

it is found that the change of power supply carbon emission standard has a greater impact on the proportion of carbon trading income. The formulation of power supply carbon emission standard should be combined with the unit emission level. Too high or too low will affect the enthusiasm of cogeneration power plants to participate in carbon trading.