大容量冲击式水电站水轮机折向器的协联控制

Deflector On-Cam Type Control of Pelton Turbine with Large Capacity

水轮机折向器有触发式和协联式两种控制方式,对冲击式水电站冲击式水轮机折向器的两种控制方式进行了大、小负荷扰动稳定性计算分析。结果表明:冲击式水轮机仅靠缓慢动作的喷针开闭及仅作为事故保护的折向器快速动作来调节,不能满足电网负荷大波动时稳定运行的要求,只有折向器与喷针协联动作,共同参与负荷调节,才能解决调节稳定性的问题;当冲击式水电机组容量占电网的容量相对较大时,冲击式水轮机折向器的控制方式应采用协联式控制。

There are two control modes of on-cam type and speed triggering type for pelton turbine deflector.The stability calculation under the large and small load disturbance have been made on the basis of the two control modes.The calculating result shows that it cannot meet the stability requirements of large load variation only depending on the needle slow moving and deflector acting as the emergency protection.Only when the deflector and needle jointly act upon the load regulating,it can attain the satisfactory stability.When the pelton turbine capacity occupies the large percentage of the electrical grid capacity,the deflector should adopt on-com type control.