水轮机筒阀电液同步控制系统数学建模与仿真

为了满足水轮机筒阀在启闭过程中的多缸同步和速度控制的要求，对筒阀电液同步控制系统中的主要液压部件。如电液比例方向阀、同步液压马达、比例节流阀和非对称液压缸进行动态数学建模分析，给出了水轮机筒阀电液同步控制系统非线性数学模型。针对筒阀在启闭过程中对同步性能和速度控制要求高的特点，提出一种双闭环（同步闭环和速度闭环）综合控制方式，该控制方式内环负反馈用于多缸同步控制，外环负反馈用于多缸速度控制。利用Simulink对系统进行仿真研究，并和试验结果进行了对比。结果表明，该系统和控制方式能满足水轮机筒阀在启闭过程中对速度和同步性能的要求。

Mathematical Modeling and Simulation of Electro-Hydraulic Synchronous Control System of Ring Gate for Hydraulic Turbine

To satisfy the requirements of multi-cylinder synchronization and velocity control, in the open and close process of ring gate for hydraulic turbine, a nonlinear mathematical model was proposed based on the analysis of dynamic mathe-matical modeling of the primary hydraulic components in the electro-hydraulic synchronous control system, such as electro- hydraulic proportional directional valve, flow dividing motor, proportional throttling valve and asymmetrical hydraulic cylinder. For the high requirements of synchronization and velocity control in the open and close process of ring gate, a synthetical control mode of double closed loop, including synchronization closed loop and velocity closed loop, was proposed. The inner loop feedback was applied for the multi-cylinder synchronous control, and the outer loop feedback for the multi- cylinder velocity control. The simulation was carried out by Simulink software, and compared with the test results. The results show that the system and the control mode can satisfy the design requirements of the synchronization and velocity control in the open and close process of ring gate for hydraulic turbine.