Abstract: The purpose of the study is to provide a theoretical basis for the energy balance distribution in the gas generator unit to implement the mathematical model of the technological process of the power plant when working on small dairy farms. The optimal operation mode with minimum wood fuel consumption is revealed in the power plant with the gas generator unit. The dependence of energy consumption on the number of dairy farm cows and on the type of wood fuel is determined. The results of process modeling of the power plant allow optimizing the design and technological parameters of the gas generator unit. The optimal operating parameters of GGU on a dairy farm for 100 head of cattle are determined: the diameter of the GGU boiler db = 0.46 m, the GG speed in the cooling coil υc.ci = 37 m/ssc, the diameter of the water storage tank dw.t. = 0.58 m.