Automatic gain control (AGC) optimizing control method of supercritical unit under coal quality changes
A supercritical unit, optimized control technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the large fluctuation of main parameters such as pressure, affect the load response speed and control accuracy, and AGC assessment quality is not up to standard. and other problems to achieve the effect of improving control quality and assessment indicators, ensuring adjustment rate and ensuring stability
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[0034] Embodiment 1, the actual application value of a certain 670MW supercritical unit is now attached: Table 2, Table 3, Table 4 represent respectively by F 1 (x) Generated K 1 ; by F 2 (x) Generated K 2 ; by F 3 (x) K of the generated boiler master PID.
[0035] by F 1 (x) Generated K 1 (Table 2)
[0036]
[0037] Table 2
[0038] by F 2 (x) Generated K2 (table 3)
[0039]
[0040] table 3
[0041] by F 3 (x) K of the generated boiler master control PID (Table 4)
[0042]
[0043] Table 4
[0044] It can be seen from the values shown in the table that the coal quality correction coefficient BTU fluctuates around 1; when the coal quality correction coefficient BTU is 1.3, 1.2 and 1.1, K 1 The value change trend is opposite to the BTU change trend, K 1 The value ranges from 2 to 2.1; when the coal quality correction coefficient BTU is 1.2, the corresponding K 1 、K 2 , K values are 2, 0.95, 2.85 respectively.
[0045] (1) Pass F according to the c...
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