Method for coordinating and controlling quality change of coal in supercritical once-through boiler unit
A once-through boiler, coordinated control technology, applied in control systems, steam generation, lighting and heating equipment, etc., can solve problems such as hidden dangers of power plant and power grid safety, coal quality changes that have not been effectively and timely solved, and slow boiler operation.
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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0049] The embodiment of the present invention provides a method for coordinated control of coal quality change of an ultra-supercritical once-through boiler unit. The method mainly includes the following contents:
[0050] 1. The BFCCS method is adopted during normal operation of the ultra-supercritical unit, that is, the boiler side adjusts the main steam pressure in front of the unit, and the steam turbine adjusts the door to adjust the unit power; the time delay of the power command is not used, and the pressure pullback is not used to sacrifice the load control accuracy.
[0051] 2. Compositio...
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