In order to increase the output of self-provided power plant

reduce the gas emission

and improve the utilization efficiency of gas resources

this paper proposes a gas scheduling based self-power generation dispatching model of self-provided power plants for energy-intensive enterprises. On the basis of step optimization dispatching of the gas scheduling model and the self-power generation dispatching model of self-provided power plant

a model is developed by coupling the two models through energy conservation and flow equilibrium. The optimization objective of the model is maximizing the plant output and minimizing the operating cost of gas-power system. The output and gas emission between step optimization and comprehensive optimization is compared lengthways at each dispatch interval through a case in point. The results of comparison show that

in terms of economic and social benefits

comprehensive optimization is able to increase plant output and reduce gas emission.