A Quantitative Evaluation Method for the Health State of Hydropower Units Based on Transient Process

Abstract

The invention provides a transient process-based hydroelectric generating set health status quantitative evaluation method. To solve the problems that conventional set safety evaluation has no standards and quantitative index basis and working conditions have a great influence on the degradation indicator thereof, the method employs transient processes such as the start and stop of a set and calculates the level of similarity of a health sample and a to-be-evaluated sample. The method fully utilizes an online monitoring system, obtains in real time the working condition information of the set, such as vibration and throw data, the active power and the guide vane opening, in the working condition processes such as the start and stop of the set, and can calculate the current health status of the set online for quantitative evaluation by calculating the level of similarity between current transient process data and standard data in a health status of the set. The method can effectively guide safe and reliable operation of hydroelectric generating sets.

Description

Technical field [0001] The invention relates to the field of state evaluation of hydroelectric generating units, in particular to a method for quantitatively evaluating the health state of hydroelectric generating units based on a transient process. Background technique [0002] During the operation of the hydropower unit, it will continue to be affected by various factors such as erosion, wear and fatigue, and the performance of each component will gradually degrade as the service time increases. Regarding the evaluation of the mechanical performance status of the unit, my country mostly uses the vibration measurement results at the key points of the unit components for evaluation. Since the hydropower unit is affected by various factors such as water, machinery, and electricity, various performance tests are used for the status Evaluate, and characterize the operating stability of the hydropower unit with abnormal or excessive vibration and water pressure pulsation. [0003] Howe...

AI Technical Summary

Problems solved by technology

However, traditional health assessment requires manual work such as sensor layout, data collection, and manual data processing and analysis, and manual experiments usually need to be shut down or scheduled for maintenance, which is restricted by the construction period and causes certain economic losses

Images