Large-scale open channel water level automatic control method based on storage capacity dynamic regulation

Abstract

The invention relates to a large-scale open channel water level automatic control method based on storage capacity dynamic regulation. The method comprises the steps of determining a feed-forward flow regulating value; determining whether the feed-forward flow regulating value needs to be subjected to feedback correction or not; calculating a feedback correction value of a feed-forward control flow; calculating a flow regulation target value; calculating the actual opening of a gate; adjusting the opening of the gate. The method disclosed by the invention adopts a feed-forward flow control mode and fully considers the influences of division flow and water level dead areas for controlling a water surface profile of the whole channel section, so that water level fluctuation at local points can be flattened and filtered out, the sensitivity to movement dead areas of the gate is reduced, and accordingly frequent operation for the gate is reduced. Storage capacity compensation conditions required by stable water delivery are conveniently realized, so that the phenomenon of water level overswing is effectively reduced, and stability can be more quickly realized. The control principle is simple and clear and easy to realize and grasp, the influences of various disturbance factors can be effectively avoided, the operation and management cost of an open channel is reduced, the water delivery safety is ensured, and the water delivery efficiency is improved.

Description

technical field [0001] The invention relates to an automatic control method for large-scale open channel water level based on dynamic storage volume adjustment, an automatic control method for hydraulic facilities, and an automatic water flow control method suitable for long-distance large-scale open channel water delivery projects. Background technique [0002] Open channels are the main water delivery method for agricultural irrigation and water diversion projects. Long-distance open water delivery channels are usually divided into multiple canal sections connected in series by multi-level control gates. Each canal section uses control sluices to adjust the water level and water delivery flow, so as to supply water to the water distribution outlets along the line in a timely and appropriate amount to meet the requirements of agricultural irrigation or urban water supply. water needs. The constant water level in front of the sluice is the general operation mode of the chan...

AI Technical Summary

Problems solved by technology

[0005] 2) Gate operation deviation problem

[0007] 4) The problem of changing the operating environment

These methods are mostly manual control or mechanical auxiliary control methods, which have the disadvantages of time-consuming, labor-intensive, low efficiency, and poor effect.

Some methods adopt the control method of PLC+host computer, but the opening of the control gate and the operation sequence of the gate group are all preset manually, relying on the personal experience of the management personnel, so it is not yet a real automatic control

Some canal projects adopt the automatic control method of single gate or gate group, such as PI and PID control algorithm, but there are obvious water level overshoot phenomena in the control process, the flow rate varies greatly, and the water level is stable slowly.

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