筒形阀电气液压同步控制系统控制策略优化

Optimization of the Control Strategy for the Electrical and Hydraulic Synchronous Control System of Cylinder Valves

针对某水电站水轮机筒形阀电气液压同步控制系统运行中存在的问题,通过引入比例阀阀芯位置反馈和筒形阀液压系统的控制电磁阀阀位反馈,实现了筒形阀液压系统中比例阀、主配压阀和液控单向阀的状态判断和故障自检,在常规PI算法中引入积分分离算法和停止态的PI控制死区,减小了系统耗油量和管路振动。应用结果表明:优化策略可提高系统的稳定性和同步控制精度。

To address the problems encountered in the operation of the electrical and hydraulic synchronous control system of the cylinder valves in hydro-turbine units in a hydropower station,valve core position feedback of proportional valves and valve position feedback of control solenoid valves in the hydraulic system of cylinder valves are introduced to realize the state judgement and fault self-inspection of the proportional valves,main pressure distribution valves,and hydraulic control check valves in the hydraulic system of cylinder valves.The integral separation algorithm and the PI control dead zone in stop state are introduced into the conventional PI algorithm to reduce the fuel consumption and the pipeline vibration of the system.Application results show that the optimization strategy can improve the stability and the synchronization control accuracy of the system.