Method and system for automatically controlling water level of inverted siphon in open channel

Abstract

The invention relates to a method and system for automatically controlling the water level of an inverted siphon in an open channel. The system comprises an open water channel section, wherein an inverted siphon is connected with the lower reach of the open water channel section in series; a working gate is arranged at the outlet of the inverted siphon; a check gate is arranged at the upper reachof the open channel section; the check gate is provided with a water level sensor in front of the check gate, a water level sensor behind the check gate and a check gate opening sensor; a check gate opening and closing mechanism of the check gate is connected with a check gate PLC (programmable logic controller); and the water level sensor in front of the check gate, the water level sensor behindthe check gate, the check gate opening sensor and the check gate PLC are connected with a control and data processor. In the invention, as the check gate is arranged on the open channel section and is provided with the water level sensor in front of the check gate and the water level sensor behind the check gate which are matched with a water level sensor and a flow sensor which are arranged at the outlet of the inverted siphon, the optimal control data are obtained by analyzing and computing the obtained data and the water level is preciously controlled according to the data, thus ensuring safe and efficient operation.

Description

Technical field [0001] The invention relates to an automatic control method and system for the water level of an inverted siphon in an open channel, an automatic control system and method, a system and method for controlling water flow in a waterway using control theory, and a system for specifically controlling an inverted siphon waterway And method. Background technique [0002] With the development of economy and society, the contradiction between water supply and demand has become increasingly prominent. Many areas have built long-distance large-scale open channel projects to transport water from the water source to the water dividers and downstream along the way. In order to maintain the stability of the water level at the watershed and adjust the water delivery flow, multi-level control gates will be set along the way to divide the channel into multiple open channel sections connected in series. When the channel encounters a road or river ditch that crosses at a level, an ...

AI Technical Summary

Problems solved by technology

Since the control adopts the working gate of the inverted siphon outlet, the discharge flow of the inverted siphon is usually changed during the control process, thereby affecting the flow of the downstream open channel section, which may easily cause large fluctuations in the downstream flow, resulting in insufficient water supply or water abandonment

Another problem is that during the preparation of the gate control regulations, the length of the hydraulic transition process of the open channel section is not considered, so the water delivery efficiency and benefits of the regulations are often not good

Finally, under the manual control mode, it is difficult to guarantee the control efficiency and accuracy, and it is urgent to introduce automatic control methods and systems

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