At present

the self-provided power plant has a large generating power

which can not be ignored in the future new energy grid-connected peak regulation. According to the selected factory-owned power plant with power and heat supply

there are the low-pressure cylinder zero output scheme

high back pressure extraction combined exhaust steam heating scheme

absorption heat pump and compression heat pump scheme. four thermo-electrolytic coupling schemes are quantitatively calculated and evaluated to provide guidance for the selection of decoupling schemes for factory-owned power plants. Four schemes were used to optimize the case unit

and the calculation results showed that after decoupling

the heat supply of the heating extraction stage can be separately increase 174.00 MW

136.18 MW

168.37 MW and 38.00 MW. The minimum electric load rate was reduced to 44.29%

73.29%

73.70% and 80.57%. The maximum heat-to-electricity ratio reached 2.00

1.50

1.50 and 1.15. The zerooutput decoupling effect of the low-pressure cylinder is the most obvious

the maximum heat supply increases the most

and the electric load rate decreases the most. Economic analysis shows that the absorption heat pump scheme has the most increased investment cost compared to other schemes.