Hydropower station gate gliding lifting and alarming method

Abstract

The invention relates to a hydropower station gate gliding lifting and alarming method, which comprises the following steps of: introducing a 'gate glide lifting enabling flag bit' into a gate control system through three gate opening alarm action value variables of KD_ALARM1, KD_ALARM2 and KD_ALARM3, three gate opening alarm reset value variables of KD_Reset1, KD_Reset2 and KD_Reset3, and four timer time variables of T_Value1, T_Value2, T_Value3 and T_Value4; determining the setting and resetting of a 'gate gliding to an automatic lifting position mark', a 'gate gliding to an alarm position mark' and a 'gate gliding to an accident position mark', and starting a gliding lifting monitoring function after the gate is normally opened to a full-open position; forbidding the gliding lifting monitoring function under the working conditions that the gate is cut off, overhauled and debugged, the gate is fully closed or temporarily opened to a certain middle position and a power station normally commands to close the gate, so that the risks of abnormal gate opening, abnormal alarm of a centralized control system and misoperation of other related equipment caused by the flag bit are avoided.

Description

technical field [0001] The invention belongs to the technical field of lubricating system control, and relates to a method for sliding and raising gates of a hydropower station and giving an alarm. Background technique [0002] The gates of hydropower stations are usually powered by hydraulic pumps to open and close the gates. When the gates do not need to be opened and closed, the hydraulic pumps are in a stopped state. When the gate is working normally, after the gate is opened to the fully open position, the pipeline in the lower chamber of the hydraulic cylinder is blocked by the cartridge valve, so that the lower chamber of the hydraulic cylinder holds the oil pressure to keep the gate in the fully open position. However, due to the inevitable internal leakage of the piston of the hydraulic cylinder and the inevitable slight leakage of the spool inside the cartridge valve, after the gate is fully opened, there will be varying degrees of decline over time. [0003] In r...

AI Technical Summary

Problems solved by technology

[0005] If the manual re-send to open the gate fails, the gate control system does not generate a clear warning signal to the operator of the failure of the gate to slide and lift, which is not conducive to the hydropower station staff taking manual intervention measures in time

[0006] The gate control system does not generate a clear signal to the operator that the gate has slipped to the limit position where it cannot continue to work, which is not conducive to the power station staff to take emergency measures to avoid danger after the gate fails to lift and manual intervention fails.

For example, after the fast door slides to the limit position where it cannot continue to work, it may cause the reverse power of the unit or even cause cavitation in the water diversion power generation system, resulting in irreparable and serious losses to the main equipment.

After the flood control door slides to the limit position where it cannot work, it will affect the traffic, or even interrupt the traffic. In severe cases, it may damage the passing vehicles, and even cause passing casualties.

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