为满足电网对水电机组一次调频的要求,对水电机组一次调频典型问题及影响因素进行了分析。提出了一种水电机组一次调频性能的优化方法,详细分析了水轮机调速器开度控制模式和功率控制模式下的PID参数优化方法,提出根据偏差变化自行调整PID参数大小,并改变一次调频计算死区,同时针对一次调频和AGC协调控制策略提出了合理建议。研究结果表明以功率调节作为优先控制模式,可保证一次调频与AGC的有机统一;通过调速系统硬件改造及内部程序实现,可完成一次调频性能优化和改进。经600 MW水电机组实际工程验证,一次调频性能得到改善,对水电机组一次调频性能优化有一定的借鉴意义。

In order to meet power grid’s requirement of primary frequency regulation(PFR) of hydropower unit, we analyze the typical problems and influencing factors of PFR, and present a method of optimizing the PFR performance of hydropower unit. The method of optimizing PID parameters of hydraulic turbine governor is analyzed in detail. We propose to adjust the PID parameters according to the range of the deviation, and to change the dead band of the PFR calculation. Furthermore, we put forward some suggestions for PFR and AGC(Automation generator control) coordination control. Power regulation mode used as a priority control mode could guarantee the coordination between PFR and AGC. Through hardware modification and internal program of governor, the PFR performance is optimized and improved. The method is applied to a hydropower unit of 600MW for verification, and the result suggests that the PFR performance is improved.