Thermal power plant generator set varying duty energy consumption analysis method based on approach method

The invention discloses a thermal power plant generator set varying duty energy consumption analysis method based on an approach method. According to the method, 18 operating parameters with large influence on economical efficiency of generator sets are selected as analyzing objects according to long-tern operation experience, an operation statistic optimum value is used as an operation reference value, a series of working conditions is hypothesized between a stable operation condition and an actual operation condition, the 18 operating parameters are made to approach an actual operation value from the operation reference value one by one, energy consumption analysis of varying duty is carried out according to coal consumption difference values in the approaching process, parameters having large influences on coal consumption levels in the varying duty process are obtained through ranking, guide bases are provided for the determination of duty varying speed, duty varying scope and the time of a stabilization section in varying duty operation of a million-level set, the purpose of reducing coal consumption for electricity generation in the duty varying operation of a power plant is achieved, the task of duty varying is completed, and coal resources are saved at the same time.