Turbine control valve quick-closing system control method based on fault critical mute time
A technology of critical cut-off time and control method, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as the control logic of the non-steam turbine shutter quick-closing system and the research on the problem of quick-closing misoperation, so as to avoid adverse effects, The effect of preventing function malfunction events and shielding fluctuations
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[0025] Below in conjunction with accompanying drawing and specific embodiment the invention is further introduced:
[0026] Such as figure 1 As shown, taking a 600MW unit produced by Harbin Steam Turbine Factory as the research object, when the power system fails and generates instantaneous fluctuations, the control logic of the valve and quick-closing system first controls the exhaust pressure of the medium pressure cylinder and the active power of the generator. The power is measured and the per unit value is taken to compare the difference. Only when the difference between the two is greater than -1 and less than 1.5, the data is considered accurate before subsequent judgment is made. Otherwise, the judgment logic will jump out and the system will report an error. If the difference is greater than 0.39, the overspeed protection (OPC) command will be triggered. If the difference is greater than 0.3, proceed to the next step of judgment; judge the signal of the steam turbine...
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