Dam gate opening and closing control method

Abstract

The invention discloses a dam gate opening and closing control method. A pair of oil cylinders are arranged on the two sides of a gate. A self-control system controls pistons of the oil cylinders to move. The self-control system comprises a pair of opening degree sensors and a PLC controller. A control program which is programmed according to a mathematical model built according to the relative position relation between the sensors and the gate is stored in the PLC controller. According to the gate opening degree value detected by the sensors, the extension strokes of the pistons of the two oil cylinders are adjusted according to the preset program, the difference value between the opening degrees of the two sides of the gate is in an allowable range, and stable operation of the gate is achieved. A method for programming the control program comprises the steps that a total opening stroke of the gate is divided into a plurality of lifting sections, manual gate lifting is adopted in eachlifting section, the initial opening degree values of the two sides of ends of each section of the gate and coded values of the two sensors are measured actually, the corresponding relation of any point in the section is obtained according to a linear algorithm, in this way, the coded values of the sensors can correctly reflect the opening degree values of the gate, the PLC control program is programmed, and control programs of all lifting sections are completed by repeating the steps.

Description

Technical field [0001] The invention relates to the technical field of water conservancy and hydropower, in particular to a method for controlling the opening and closing of a dam gate. Background technique [0002] In the overflow facilities of modern large hydropower stations, the double-cylinder hydraulic opening and closing arc gate has been widely used due to its large sealing area and stable opening and closing. However, higher requirements are placed on the opening detection device and PLC control program. This type of gate opening control method is: the sensors installed on both sides of the gate respectively detect the opening on both sides of the gate and transmit it to the PLC. The PLC calculates and compares the opening data on both sides in real time, and sends it out according to the established program logic. Correction command controls the pressure relief of the cylinder on the side with the larger gate opening, thereby reducing the opening of the side gate, and c...

AI Technical Summary

Problems solved by technology

[0003] However, in actual engineering applications, due to cumulative deviation, gate deformation and other reasons, the program algorithm written through the above function correspondence often leads to a large deviation between the gate opening detection value and the actual value

The difference will increase irregularly as the deformation of each part increases after the long-term operation of the gate, and it will be difficult to rewrite the program through the measurement and correction of each fixed value

Images