Analysis of the Dynamic Balance and Stability Tests for the No.1 Generator Unit in Xisiping Hydropower Station
In Xisiping Hydropower Station,HLD06A-WJ-50 type hydro-turbine unit and SFW630-6/990 type genera-tor unit are adopted.During the maintenance in 2020,the front and rear bearings of the generator were replaced.In the start-up process,excessive vibration of the generator was observed.Thus,dynamic balance test and stability test of the unit were carried out.With the guidance of the tests,satisfactory adjustment performance was achieved after the treat-ment.The results of the variable current test in the stability test show that the electromagnetic balance state of the unit is not good.It is recommended to conduct relevant electrical inspections or tests on the generator.At present,the original swinging at the swinging measurement point of the unit is relatively large.Thus,it is also recommended to check and re-pair the surface smoothness and ellipticity of the shaft neck,and review the original swinging value.
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