Real-time state evaluation and life cycle management and prediction system for hydraulic turbine runner

Abstract

The invention belongs to the technical field of state monitoring of hydraulic turbine generator units, and discloses a real-time operation state health evaluation and full life cycle management and prediction system for a hydraulic turbine runner. Real-time evaluation is conducted on the operation health state of the runner according to integrated information such as the inherent characteristic ofthe runner of a power plant set, manufacturing information of the runner, set mounting information, set real-time operation data, the set overflowing water quality and the content of muddy sand, information such as operation state information of the runner, the operation health degree of the runner, a real-time gap value of a leakproof ring of the runner, the deterioration degree and the fatiguelife of the runner, the predictive overhauling cycle of the runner, an operation evaluation report of the runner and set operation and maintenance optimization suggestions are digitally displayed on adisplay station in real time, and quantitative scientific decision support is provided for safe, stable and economic operation, reasonable overhauling and fault diagnosis of a hydroelectric generating set.

Description

technical field [0001] The patent of the invention belongs to the technical field of state monitoring and health assessment of hydroelectric generator sets, and specifically relates to a real-time state assessment and life cycle management prediction system for hydroturbine runners. Background technique [0002] The runner of the hydro-generator set is crucial to the safe, economical and stable operation of the entire unit. At present, many power stations have encountered problems such as runner wear and serious cavitation, runner blade cracks, and runner stop ring abrasion. Moreover, most hydroelectric units have been connected to the grid AGC, that is, automatic power generation control of the units. The input of AGC has caused major changes in the operation mode of hydroelectric units, that is, multiple units operate with partial load for a long time, frequent unit load adjustments, and large load fluctuations. Moreover, the adjustment speed is fast, the unit frequently c...

AI Technical Summary

Problems solved by technology

This patent scheme has the following disadvantages: 1) The runner life evaluation only considers the measured dynamic stress, and there are many actual influencing factors, such as the hydraulic design of the unit's full channel, the inherent characteristics of the runner, the runner material, manufacturing process and residual stress, etc. ; 2) The indicators that affect the running health of the runner include cavitation and abrasion. This patent does not involve or introduce relevant evaluation parameters, such as the water quality information of the unit flow and the content of mud and sand; 3) The clearance of the runner stop ring is not involved security assessment

[0006] In the actual operation of the hydraulic turbine unit, its working conditions are complex and changeable. Factors such as unit pressure pulsation, cavitation, mud and sand wear, runner manufacturing quality, unit installation quality, and unit shafting operating status affect the vibration, stress and fatigue of the runner. The service life and so on have a great impact, and the online fluid simulation and online structure finite element simulation technology of the runner is not yet feasible. At present, there is no related system that can comprehensively consider the above factors for real-time evaluation, life cycle management and prediction of the running state of the runner.

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