The requirements of over limit evaluation and measuring points layout of vibration/swing in hydropower units in industry standards and national standards are compared. The layout of vibration/swing measurement points on the project site is also described. It is found that the standards related to evaluation and the ones related to measuring points arrangement are inconsistent or unclear with the engineering site

such as vibration evaluation boundary conditions

evaluation criteria

evaluation working conditions and measuring points arrangement. Analysis shows that all the differences between the standards appear in vibration evaluation and measuring points arrangement for fixed parts

and the provisions on radial vibration(swing) of the unit shafting are relatively unified. Inconsistencies in all standards are not conducive to broad-spectrum application

and are prone to ambiguity and disagreement. The phenomenon that the evaluation standard is inconsistent with the measuring points standard

is not conducive to on-site comprehensive vibration evaluation of large or giant units.All the standard evaluation criteria lack the consideration of weight coefficient of amplitude exceeding the limit and cumulative duration

which is not conducive to the development of vibration fault and condition based maintenance

and data accumulation in the new role of hydropower units. The conclusion is expected to provide analytical help and reference for the practitioners of vibration standard compilation

installation and acceptance

operation management and scientific research and test of hydropower units.