Based on the method of determining electricity according to heat

and through introducing the theoritical coeeficient of thermal and electric loads

the working conditions' graphmetric method has been improved

and the heat-electricity function model being obtained.Taking one 300 MW unit as example

the result of verification shows that the heat-electricity function relationship of the co-generation unit can be more accurately and conveniently constructed by using the said model.According to this function relationship

the thermal power plants and power grid companies can conveniently regulate and control the operation of thermal power units.