水电能源科学

针对大型混流式水电机组一次调频响应能力受运行水头变化影响的问题，提出了一种基于自适应特性前馈功能在水轮机一次调频功能中应用的方法，即将水轮机水头、导叶开度及功率的三维曲线函数库引入到水轮机一次调频前馈控制环节中，根据实时的水头和功率大小及导叶位置，以频率变化对应功率变化大小，通过三维数据库计算出接力器的行程直接作用于控制器的输出，并与一次调频常规控制方式进行了现场实际对比验证。试验结果表明，采用该种前馈功能既满足不同水头下一次调频性能的一致性又有效地避免了设置切换多组PID控制参数。该结果为研究水轮机组一次调频功能实现提供了一种新的思路。

In order to solve the problem that the response ability of a large mixed-flow hydropower unit is affected by the change of operating water head, a method based on the adaptive feedforward function is proposed for the application of the turbine's primary frequency regulation function. The 3D curve function library of turbine's water head, guide vane opening and power is introduced into the primary frequency regulation feedforward control of the turbine. According to the real-time water head and power and the position of guide vane, the power change corresponding to the frequency change is calculated through the 3D database to directly affect the output of the controller. Compared with the conventional control mode of primary frequency regulation, it is verified by field practice. The experimental results show that the feedforward function can not only satisfy the consistency of the next frequency regulation performance of different water heads, but also effectively avoid setting and switching multi-group PID control parameters. Thus, it provides a new way to realize the function of primary frequency regulation of hydraulic turbine units.