Load regulation speed dynamic regulating method and device under AGC mode of thermal power generating unit

Abstract

The invention discloses a load regulation speed dynamic regulating method and device under the AGC mode of a thermal power generating unit. The load regulation speed dynamic regulating device comprises a subtracter module DEV1, an absolute value module ABS and a function setting module F(x) which are sequentially connected in series, wherein the subtracter module DEV1 is connected with a high / low amplitude judgment module HLALM in series; the output ends of an analog quantity generator A1, the function setting module F(x) and the high / low amplitude judgment module HLALM are respectively connected with the input end of a selector module AXSEL. The load regulation speed dynamic regulating method and device under the AGC mode of the thermal power generating unit has the advantages that, through dynamically regulating the regulation speed, it can ensure that the load regulation of the unit can be quickly performed when the main steam pressure is stable, so as to quickly reach the load target value required by scheduling and achieve the optimization of the examination index.

Description

technical field [0001] The invention relates to the field of automatic power generation control of a thermal power unit, in particular to a method and device for dynamically adjusting a load regulation rate of a thermal power unit in an AGC mode. Background technique [0002] With the grid connection of new energy, load growth and the continuous increase of the scale of the power grid, as well as the increase in the installed capacity of the power industry in my country and the increase in the peak-to-valley load difference on the power side, in order to ensure the safe and stable operation of the power grid, all large-scale thermal power units require With the AGC function enabled, large thermal power units often operate in a wide load range, generally ranging from 50% to 100% of the rated load, and the units are required to respond quickly, accurately and stably to load changes. [0003] The AGC assessment is mainly carried out in three aspects: adjustment rate K1, adjustme...

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Problems solved by technology

After the adjustment rate of unit lifting and lowering load exceeds the basic requirement value stipulated by the dispatching control department, although it does not directly affect the performance index of the assessment, the relative operation cycle of the unit with a faster rate will be shortened, which will bring some help to the AGC assessment

When running in AGC mode, the unit is in coordinated control mode (CCS). At this time, the power is adjusted on the steam turbine side, and the pressure is adjusted on the boiler side. It will bring certain negative effects to the stability of unit coordinated operation and the accuracy of load control, which in turn will affect other performance indicators such as the assessment of the dispatching control department.

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