A method for analyzing the differential consumption of ultra-supercritical generating units with variable loads in thermal power plants

Abstract

The invention discloses an energy consumption difference analysis method for load varying of an ultra-supercritical generating unit of a thermal power plant. The method comprises the steps of selecting eighteen operation parameters having a greater influence on the economy of the unit as analysis objects; applying a clustering method to the eighteen operation parameters to obtain an operation optimum condition: taking the operation optimum condition as a stable operation standard working condition, and selecting eighteen actual working conditions from a load varying range; taking eighteen parameter influencing factors as independent variables: establishing eighteen equations by taking the energy consumption difference between a single influencing parameter change value and a stable operation standard value as a coefficient of the parameter influencing factor and taking the energy consumption difference between an actual working condition and the stable operation standard working condition as a dependent variable, and finally solving to obtain eighteen parameter influencing factors; finally sequencing the eighteen parameter influencing factors to obtain a parameter having the greatest influence on the coal consumption level in a load varying process. Guidance basis is provided for determination of load varying velocity, load varying amplitude and stable stage time in the load varying operation of million of units, so that the aim of reducing the coal consumption in electricity generation in the load varying operation of the power plant is achieved.

Description

technical field [0001] The invention relates to a method for analyzing the differential consumption of an ultra-supercritical generating set, in particular to a method for analyzing the differential consumption of an ultra-supercritical generating set in a thermal power plant. Background technique [0002] The demand for electricity is increasing day by day, and the load of large-scale thermal power plants fluctuates with the peak and valley of electricity consumption. The speed of load change, too large load change range and too short load stabilization time will cause the actual operating condition to deviate from the stable condition, which makes the coal consumption of power supply during the variable load operation of the unit far greater than the corresponding stable operation coal consumption . In order to keep each operating parameter at the target value during operation and to make the large-scale ultra-supercritical unit take advantage of high parameters, it is pa...

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Problems solved by technology

[0004] For the consumption difference analysis of large-scale units, the existing methods are mostly aimed at the analysis of the consumption difference between the stable operation unit and the design condition, the influence of a single factor or system parameter change on the energy consumption, and the whole power plant system as the overall research object. The analysis methods of the variable operating condition consumption difference of large units are rarely involved, and the formulation of the variable operating condition adjustment optimization scheme for large units operating under variable operating conditions lacks a comprehensive and systematic guiding role. A more systematic and in-depth study using differential analysis

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