燃煤机组变负荷瞬态过程的实时能耗分析

Based on the calculation method of the energy consumption in the steady-state conditions and the operating characteristics during the transient processes of coal-fired power units, considering the change of boiler heat storage during the transient processes and the influence of steam thermodynamic parameters on the turbine efficiency, a more general energy consumption analysis model was established, which makes some simplification to meet engineering application requirements. The real-time energy consumption calculation of coal-fired units could be realized under the whole operating condition with the model. The energy consumption analysis model was applied to a 660 MW ultra-supercritical coal-fired power unit to verify the reliability, and the calculated coal consumption was compared with that of thermal system simulation model during the selected typical load change processes. Results show that the calculated energy consumption results are consistent with the trend of the measured coal consumption. Furthermore, the maximum deviation between the calculated values of the standard coal consumption rate with these two models is less than 1%.