Method for automatic control of supercritical or ultra-supercritical units from wet state to dry state
An ultra-supercritical unit, supercritical technology, applied in the direction of control of water supply, control system, lighting and heating equipment, etc., can solve the problems of uneven operation level of power plant operators, large load fluctuations, steam temperature overheating, etc., to achieve unit parameters Effects of slow change, reduced work intensity, and improved operating level
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[0038] Below with reference to accompanying drawing, further illustrate the present invention.
[0039] The method for automatic control of the transition from wet state to dry state of a super (super)critical unit of the present invention comprises the following steps.
[0040]Step 1: Confirm that the unit has met the dry-wet state conversion conditions, and start the dry-wet state automatic conversion control logic. For once-through boilers of ultra (super)critical units manufactured by different manufacturers, the timing of dry-wet state conversion is different. For example, the 1000MW ultra-supercritical unit of the third phase of Guodian Power Beilun Power Plant turns to dry state at 25-27% BMCR load. Zhejiang Huaneng The 1000MW ultra-supercritical unit of Yuhuan Power Plant turns dry when the load is 34% BMCR, and the 1000MW ultra-supercritical unit of Zhejiang Zheneng Taier Power Plant turns dry when the load is 35-40% BMCR. In order to make the dry-wet transition proc...
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