Reliable low-oil-pressure start-up accident flow control loop for unit accident
A process control and control loop technology, applied in the direction of machines/engines, control system applications, mechanical equipment, etc., can solve problems such as accident shutdown, unit start-up accident shutdown, etc., to reduce the possibility of malfunction, reliable control loop, and reliable action sex-enhancing effect
Active Publication Date: 2016-11-09
LONGTAN HYDROPOWER DEV
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Problems solved by technology
[0003] However, when the oil pressure device has only one pair of accidental low oil pressure signal input, when the pressure switch node on the pressure oil tank malfunctions due to oil pressure fluctuations or plant vibrations, it is easy to cause the unit to start and stop in an accident. On the other hand, when the computer module is damaged, it may also cause accidental shutdown
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[0016] A reliable accident process control loop for unit accident low oil pressure startup, in which an accident low oil pressure pressure plate is connected in series on the control loop bus, and at the same time output the accident low oil pressure pressure plate signal to the computer monitoring system; switch, and check out three pairs of accident low oil pressure contacts, which are respectively accident low oil pressure point I, accident low oil pressure point II and accident low oil pressure point III; then connect accident low oil pressure point I, accident low oil pressure point Point II and accident low oil pressure point III are respectively connected to signal input module A, signal input module B, and signal input module C set in the computer monitoring system;
[0017] Such as figure 1 , 2 As shown, when the emergency low oil pressure point I and the accident low oil pressure point II output the accident signal at the same time, or the accident low oil pressure ...
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The invention discloses a reliable low-oil-pressure start-up accident flow control loop for an unit accident. A control loop bus is connected with an accident low-oil-pressure pressure plate in series; a signal of the accident low-oil-pressure pressure plate is output to a computer monitoring system; a pressure switch is mounted on a pressure oil tank; three pairs of accident low-oil-pressure points, which are respectively accident low-oil-pressure points I, accident low-oil-pressure points II and accident low-oil-pressure points III are checked out; and the accident low-oil-pressure points I, the accident low-oil-pressure points II and the accident low-oil-pressure points III are respectively connected with a signal input module A, a signal input module B and a signal input module C in the computer monitoring system. The control loop disclosed by the invention is more reliable and stable. After an accident low-oil-pressure signal is transformed, the misoperation possibility is greatly reduced, the action reliability is improved, and the safe stability of the unit is strengthened.
Description
technical field [0001] The invention belongs to the technical field of hydropower station accident monitoring, and in particular relates to a reliable flow control loop for low oil pressure start-up accident process of a unit accident. Background technique [0002] When the oil pressure of the oil pressure system drops sharply due to the failure of the oil pump of the oil pressure system or the oil leakage of the pipeline, if a unit accident occurs, the governor cannot close the guide vane of the turbine in time due to insufficient oil pressure, which will cause the unit to overspeed or even send out Escape, causing the unit to suffer major damage, so the unit of the hydropower plant must be equipped with accidental low oil pressure water machine protection: use the pressure switch to check the low oil pressure action contact signal, after the contact action, send the signal to the computer input module to start Incident downtime process. [0003] However, when the oil pres...
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Patent Timeline
Login to View More IPC IPC(8): F03B15/18
CPCF03B15/18F05B2270/107Y02E10/20
Inventor 俸梅陈湘宁王鹏宇向小峰李先梧邓晓春
Owner LONGTAN HYDROPOWER DEV