FIELD: control of power plant start by power channel containing thermal energy source and heat removal loop at substantially non-linear characteristic allowing to practically neglect heat removal at initial stage of steady conditions of preheating the heat-transfer agent of power plant. SUBSTANCE: at stage of control of power plant start by power channel, measured temperature of power plant is compared with preset magnitude depending on output signal proportional to power and driving action which includes section of power stabilization at preset level before considerable increase of heating mode of heat-transfer agent, for example by no more than 5 to 10 percent of its nominal value forming error signal. According to the results of comparison, preset level of temperature is selected; in case measured temperature exceeds preset magnitude (for positive error signal), new preset level shall exceed initial one; it shall correspond to permissible positive error of power determination; in case measured temperature is less than preset magnitude (for negative error signal) which is indicative of under-heating of power plant to preset temperature, new preset level shall be less than initial one and shall correspond to permissible negative error of power determination; then measured temperature is compared with selected preset temperature and in case measured temperature exceeds measured temperature of higher additionally preset level, rate of power rise shall be reduced; in case of underheating of power plant to lesser preset level, rate of power rise shall be increased through additionally converting the output signal; in course of increasing the rate of power sire, this signal is increased for reduction of rate and is reduced for increase of rate at constant program of driving action. EFFECT: reduced deviation of thermal power from preset time program and consequently enhanced reliability of power and improved parameters of its starting process due to earlier correction of control by power channel in course of stabilization of thermal power at lower level as compared with nominal value. 3 cl, 2 dwg
