| Ring gate for turbine as an advanced inlet valve has been widely used, it needs more than just a common drive servomotor because of its own weight. According to characteristics of the ring gate synchronous control system, this dissertation deals with model of synchronous control system and simulaition of synchronous performance. Through the practical application of engineering to verify the performance of the system and meet the design requirements. The main contents and contributions of this dissertation are listed as follows:(1) On the analysis of the ring gate synchronous control strategy and on the basis of the contrast in the control method, a control method combined with mechanical, electrical and hydraulic is put forward. Also the hydraulic control system and electrical control system is studied.(2) Model for the whole system with AMESim. In order to analyze the synchronous performance and the speed control of servomotors which are affected in the rising process, the different loads, hydraulic cylinder manufacturing error, different synchronous motor emissions, leakage and whether the flow valves open or not are considered to the synchronous performance. Also the pipe length, diameter, type to the dynamic characteristics of the system, etc.(3) According to the hydraulic system of PLC control, the traditional PID algorithm is used to solve the influence of the nonlinear, lags in response of the hydraulic system. To the parameters settings in the simulation process, the method of Genetic algorithm to optimize PID parameters is resolved by using the design optimization module in AMESim. Results show that traditional PID algorithm can solve the problem and have obvious improvement. It saves time and improves efficiency by using Genetic algorithm to optimize PID parameters.(4) The functions and performance of ring gate synchronous system are vertified by engineering applications in hydropower plant for Yunnan Hong he Nansha, and it meets the design requirements. |
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