Research On Co-simulation And Experimentation Of Electro-hydraulic Control System Of Ring Gate For Hydraulic Turbine

gate for hydraulic turbine (the development and application of ring gate for hydraulic turbine and it’s electro-hydraulic system) is studied. The mechatronics and hydraulics system of ring gate is modeled and analyzed on the purpose of studying the dynamic characteristic of electro-hydraulic control system of ring gate in the opening, closing and emergency shutdown processing. The main research contents and results are shown below:(1) A control method, combining with mechanics, electrics and hydraulics, is put forward which based on the function, characteristics and application situation of ring gate for hydraulic turbine. The compositions and control strategies of system are also studied.(2) Combining with status quo of synchronization control and simulation of ring gate, the body of ring gate is analyzed by dynamic method. The reasons conduce to synchronization error are analyzed, which are important for the construction of simulation model.(3) Base on the operational principle of ring gate for hydraulic turbine, a co-simulation approach is used to resolving the problems of ascertain load and coupling of cylinders. Hydraulic model of ring gate is established by AMESim software and mechanical model is established by LMS Virtual.Lab software, and the body of ring gate and piston rods of cylinders are treated with flexible processing. To make the linkage between AMESim with LMS Virtual.Lab, the interface parameters are set. The effect of cylinder diameter error and internal leakage on the opening, closing and emergency shutdown processing, are analyzed, especially on the effect of downward pull and overturning moment, which are generated by hydrodynamic force in the emergency shutdown processing.(4) Through the contrast the simulation results with the experimental results of ring gate at Nansha and Madushan Hydropower Station in Yunnan province, one conclusion is come to that the simulation model can match the fact well. It also verify that the electro-hydraulic control system of ring gate meet the design requirements.