Peak shaving method of thermal power generating unit

Abstract

The invention relates to the field of peak shaving of thermal power generating units, and discloses a peak shaving method of a thermal power generating unit. The peak shaving method comprises the following steps that firstly, dynamic separators of coal mills are adjusted, so that the fineness of the pulverized coal is less than or equal to the predetermined value of the fineness of the pulverizedcoal; secondly, a condensate pump of a steam and water system is enabled to exit the automatic mode, and the outlet pressure of the condensate pump is manually adjusted to the first pressure predetermined value; thirdly, primary air systems are adjusted; fourthly, the temperature of coal mill outlets of the dynamic separators is adjusted to the first predetermined temperature; fifthly, the openingdegree of secondary windshield plates of secondary air systems is adjusted to the first predetermined range; and sixthly, the load of the thermal power generating unit is reduced to the predeterminedload according to the predetermined speed, and the predetermined speed is less than or equal to 1.5% of rated load per minute. By the adoption of the peak shaving method of the thermal power generating unit, the peak shaving capacity of the thermal power generating unit can be remarkably improved.

Description

Technical field [0001] The invention relates to the field of peak shaving of thermal power units, in particular to a method for peak shaving of thermal power units. Background technique [0002] With the increasing peak-to-valley difference of power load and the large-scale access of random and intermittent renewable energy sources, the power system has put forward higher requirements on the peak-shaving capacity of coal-fired power plants. Technical research on deep peak-shaving of coal power plants is required. It is of great significance to improve the peak shaving capacity of thermal power units, adapt to grid requirements, and improve the economy and environmental protection of thermal power units. [0003] At present, there are few technical data for deep peak shaving of thermal power units with a rated load of 30% and below, especially for thermal power units with a rated load above 1000MW, which are difficult to reduce the load, and combustion instability is very easy to oc...

AI Technical Summary

Problems solved by technology

[0003] At present, there are few technical materials for deep peak regulation of thermal power units with a rated load of 30% or below, especially for thermal power units with a rated load above 1000MW, it is difficult to reduce the load, and combustion instability is very likely to occur during the load reduction process , Boiler fire extinguishing situation, and even cause the generator set to trip, affecting the normal power generation of the power plant

The flexibility of thermal power units is low, and it is difficult to adapt to the peak shaving requirements in the existing power supply process, resulting in energy waste, and making thermal power plants less economical and environmentally friendly

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