This invention relates to an online monitoring method and device for generator
stator winding cooling water inlet pipes. The online monitoring method includes: sequentially
numbering the
stator upper layer bars,
stator lower layer bars, annular leads, and outlet
bushing water inlet pipes, and dividing them into zones according to the
numbering order: upper layer bar zone, lower layer bar zone, annular lead zone, and outlet
bushing zone; simultaneously acquiring the flow rates of normal and abnormal water inlet pipes in each zone in real time; and obtaining the flow rate deviation value of all abnormal water inlet pipes based on the flow rate value of a single abnormal water inlet
pipe and the average flow rate of all normal water inlet pipes; determining whether the flow rate deviation value of the abnormal water inlet
pipe is greater than a set value; if it is greater than the set value, issuing a maintenance reminder for the corresponding abnormal water inlet
pipe according to its number. This invention can determine whether the water inlet pipe needs maintenance by monitoring the flow rate value online, thereby reducing the risk of generator insulation damage caused by water inlet pipe blockage and improving operation monitoring capabilities.