Coordinative control method for supercritical unit boilers quickly adaptive to change of heat value of fire coal
A supercritical unit, coal-fired calorific value technology, applied in the control system, lighting and heating equipment, steam generation, etc., can solve the problems of unstable operation of the fuel control system, fuel changes, etc., and achieve fast and real-time coal-fired calorific value Effect
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[0042] See figure 1 , figure 2 , a method for coordinating control of supercritical unit machine furnaces for fast adaptive coal calorific value changes, the method includes the following steps:
[0043] ①Comprehensively and quickly calculate the parameters representing the change of coal-fired calorific value from the steam turbine regulating stage pressure, steam-water separator pressure, coal feed rate, and unit load parameters;
[0044] By calculating the ratio of the boiler heat signal to the inertia link of the coal quantity and the time delay, after filtering, it can quickly represent the coal combustion calorific value parameter:
[0045] R=Filter(HR / LEADLAG(M)e -D ) (1)
[0046] HR - heat signal (MW);
[0047] M-coal supply, t / h;
[0048] Filter-filtering module;
[0049] LEADLAG-inertial link module;
[0050] τ - lag time, s;
[0051] R-coal calorific value parameter;
[0052] The heat signal uses a conventional algorithm:
[0053] HR=TEF+C b ·P D ' (...
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