Water level automatic control method

Abstract

The invention discloses an automatic method for water level of reservoir, which is indicated measuring the current water level of reservoir with water level pressure transmitter, calculating the deviation factor triangle H of water level measuring value with the specified value, synchronously calculating the rising speed of water level S and taking into the PID algorithm, obtaining the variation jaw opening triangle H of valve, and obtaining the target jaw opening L by adding the original jaw opening L0. The invention implements the presetting of PID parameter, calculating and the process formathematical model with PLC, and synchronously controls the jaw opening of valve with the output of PLC. The positive effect of this invention is indicated as convenient measuring, excellent control quality, and quickly and automatically controlling the water level in a specified scope in the condition of fewer times of valve agency.

Description

technical field [0001] The invention relates to a method for automatically controlling the water level of a reservoir of a hydropower station or a water level of a grit chamber. Background technique [0002] At present, in the automatic control of the reservoir water level, the conventional control method is to use a float switch or a simple water level measurement transmitter to judge the water level to control the opening and closing of the gate. The control speed and accuracy of the water level are far from meeting the control requirements. Moreover, it is impossible to realize the joint adjustment of multiple gates, and it is even more impossible to realize complex control strategies. Under this simple control method, when the water level rises or falls rapidly, it cannot quickly stabilize the water level to reduce the amount of water discarded, nor can it effectively prevent the occurrence of dam overflow accidents under abnormal conditions, and the labor intensity of w...

AI Technical Summary

Problems solved by technology

[0002] At present, in the automatic control of the reservoir water level, the conventional control method is to use a float switch or a simple water level measurement transmitter to judge the water level to control the opening and closing of the gate. The control speed and accuracy of the water level are far from meeting the control requirements. Moreover, it is impossible to realize the joint adjustment of multiple gates, and it is impossible to realize complex control strategies.

Under this simple control method, when the water level rises or falls rapidly, it can neither quickly stabilize the water level and reduce the amount of discarded water, nor can it effectively prevent the occurrence of dam overflow accidents under abnormal conditions, and the labor intensity of the workers is high.

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