Method and device for determining coal consumption characteristic curve of thermal power generating unit

Abstract

The invention provides a thermal power generating unit coal consumption characteristic curve determination method and device, and the method comprises the steps: obtaining the historical data of a thermal power generating unit according to a preset data reading time period and a data reading period; the historical data of the thermal power generating unit comprises power supply power; performing stability screening on the historical data of the thermal power generating unit by using a preset stability threshold to obtain stable industrial control data; comparing the obtained real-time operation data with the stable industrial control data to obtain an absolute value deviation ratio corresponding to the stable industrial control data, and selecting matched data from the stable industrial control data according to the absolute value deviation ratio; and determining power supply coal consumption according to the matched data, and performing data fitting on the power supply coal consumption and the power supply power to obtain a coal consumption characteristic curve of the thermal power generating unit. The obtained coal consumption characteristic curve can be close to the actual coal consumption characteristic of the current operation condition of the unit to the maximum extent, the current real coal consumption level of each unit can be reflected more accurately, load optimization distribution can be guided more effectively, and better economic benefits can be obtained.

Description

technical field [0001] The invention relates to the technical field of thermal power units, in particular to a method and device for determining a coal consumption characteristic curve of a thermal power unit. Background technique [0002] With the continuous increase in the proportion of new energy power generation, the proportion of thermal power assembly machines is getting lower and lower. In order to cope with the consumption of new energy, thermal power units have assumed an important role in peak regulation, resulting in a reduction in the number of effective utilization hours and an increase in power generation costs. How to adjust the operation mode of the unit to the best economic state in time is a problem that every power plant pays close attention to now. Economic dispatch (ED) is an important issue in power system operation. Its goal is to rationally distribute the active power of each generator in the power system to minimize the cost of power generation unde...

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Problems solved by technology

The coal consumption characteristic curve can accurately reflect the coal consumption level of the unit under the test conditions at that time, but the actual operating conditions are quite different from the test conditions, and a large amount of experimental work is required to obtain the coal consumption characteristic curve through the performance test method. and cost will be greatly increased, lack of operability in the long run

[0004] At the same time, due to factors such as unit performance aging, changes in operating conditions, unit renovation and maintenance, and climate and environmental changes, the coal consumption level of the unit will change at any time, so that the coal consumption characteristic curve of the unit using offline preset test conditions cannot be true. Reflect the performance differences of each unit, and thus cannot accurately and reliably guide the ED process

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