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Water level automatic control method

A water level and water level measurement technology, applied in liquid level control, non-electric variable control, control/regulation systems, etc., can solve the problems of inability to implement control strategies, reduce water abandonment, and high labor intensity of workers, and achieve a variety of complex tasks. Control strategy, meet control requirements, and the effect of fast and stable water level

Active Publication Date: 2009-10-07
四川中鼎科技有限公司
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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.

Method used

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Embodiment Construction

[0016] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0017] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0018] Such as figure 2 Shown, the present invention is realized through the following steps:

[0019] Step 1: Use a water level pressure transmitter to measure the current water level in the reservoir area, reduce the interference of instantaneous water level peaks and troughs through PLC digital filtering, calculate the deviation coefficient ΔH between the water level measurement value and the given value, and calculate the water level gro...

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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 for mathematical 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D9/12G01F23/14
Inventor 唐洪王春林何军胡川华黄强
Owner 四川中鼎科技有限公司
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