The main goal of the present study is to apply electric control to the processes developing at wheat straw co-combustion with peat for more effective utilization of wheat straw for energy production. This work combines experimental study and mathematical modelling of the processes developing during the co-combustion of straw pellets with peat pellets in order to assess the electric field influence on the main gasification/combustion characteristics, heat output from the device and on the composition of the flue gas by varying the bias voltage of the axially inserted electrode and the mass load of straw in the mixture. A mathematical model of the electric field effect on the main combustion characteristics (flow velocity, flame temperature and composition) at the co-combustion of straw with peat pellets is built within the environment of the MATLAB package with account of the electric field effect on the displacement of equilibrium during the thermal decomposition of the mixture of wheat straw and peat, thus resulting in the variation of the concentration of the combustible volatiles (CO and H2) at the inlet of the combustion chamber.