Aiming at the problem of low frequency deexcitation during load rejection of a power station,the low-frequency phenomenon during load rejection of Kaplan turbine is analyzed,and avoids the low-frequency phenomenon during load rejection by optimizing the minimum no-load opening limit of guide vane.At the same time,the field test of the optimized unit is carried out.The effectiveness of this method for low frequency during load rejection of Kaplan turbine is verified,which provides technical support for turbine's safe and stable operation.
Kaplan turbineload rejectionlow frequency phenomenonsafety and stability