The Design And Implementation Of Opening Measure And Synchronous Control System Of Radial Sluice Gate

The sluice gates of large hydropower stations play a very important role in regulating water and ensure the safety of the surrounding area in the flood season, which is widely used in the water conservancy facilities. Hydropower stations usually use two lifting-point hydraulic hoist to control the sluice gate, which leading the gate oblique. This thesis focuses on solving the accuracy of opening detection and reliability of the synchronous control system, which is meaningful to large span sluice gates. This thesis studies the sluice gates based on station # 6 and # 11. Based on the characteristics of large span sluice gates and the analysis of synchronization tolerance, this thesis designs the opening detection systems and synchronization control system, which is meaningful in the sluice gates.A content of this thesis is to design a high-precision opening detection system for radial gate. Before designing opening detection system, this thesis shows a lot of sensors which can be used in the open measuring of the sluice gates, such as magnetostrictive displacement sensor, eddy current sensor and permanent magnet bar code sensor. We compare the advantages and disadvantages of detection accuracy among these sensors. The opening detection is the foundation of the control system, this thesis also introduce the methods of using pull rope displacement sensor and gray bus displacement sensor to measure the opening of the sluice gate. We describes the detection principle and the detection methods,both of the detection accuracy and the detection methods can meet the requirements of synchronization control for the two sensors. To ensure the accuracy of the measuring,using the detecting data collecting from the total station to adjust the measuring data.Another important part of this thesis is to design the control system of large span sluice gate. Synchronous control technique is the main technique to control the two lifting-point hydraulic hoist of the sluice gate, which is a key technology to guarantee the operation of the gate in a right situation. This project will introduce a method of using electro-hydraulic proportional valve to rectify the deviation for the sluice gate, we use an electro-hydraulic proportional valve to rectify the deviation in three segments or a PID controller, which means different kinds of voltage are taken in difference situation when the sluice gate moves up and down, ensuring that the difference of the opening between the left gate and the right gate is always within a small range and no huge inclination for the sluice gate. When using the PID controller to control the sluice gate, appropriate controller parameters are calculated for the modeling and simulation of the electro-hydraulic proportional valve and the oil cylinder systems in MATLAB. In the result, we get a good effect.Based on the above,In the hydropower station, we debug the program using different detection sensors, setting an appropriate adjustment value for this project, the result showing that in a number of experiments the sluice gate runs in a good condition and the tolerance between both sides of the gate is always controlled in a reasonable range. It can be learnt by other hydropower stations。...