Cogeneration unit control method and system based on energy balance and electronic equipment

The invention discloses a cogeneration unit control method and system based on energy balance and electronic equipment, and relates to the field of unit control. On one hand, the boiler combustion rate deviation is obtained by determining the energy requirement of the steam turbine and the boiler combustion release energy so as to generate the fuel quantity adjusting signal, and on the other hand, the feedforward control signal is generated based on the power generation load set value and the heat supply steam extraction flow set value so as to balance and control the main steam pressure. The PID controller is adopted for controlling the opening degree of a steam turbine adjusting valve and the opening degree of a heat supply and steam extraction adjusting butterfly valve, fusion of a heat supply and steam extraction rapid adjusting loop and a fuel quantity accurate adjusting loop is achieved, and the load control performance of a unit is effectively improved. Moreover, the load change is superposed on the de