Method for predicting turbine generator insulating thermal aging life

A turbine generator and life prediction technology, which is applied in the direction of engine testing, machine/structural component testing, electrical measurement, etc., can solve problems such as lack of methods and systems

CN101109779BActive Publication Date: 2010-05-19SHANGHAI POWER EQUIP RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-05-19

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Abstract

The invention relates to a method for predicting the thermal aging life of a stator winding insulation of a steam turbogenerator, which is characterized in that, a computer software for predicating the thermal aging life of a stator winding insulation of a steam turbogenerator programmed by language C is installed on a calculation / application server; based on the time interval set by the software,statistics data on frequencies at different temperatures of the stator winding insulation of the steam turbogenerator are read from a database server, the accumulated operation times of the stator winding insulation of the steam turbogenerator at different temperatures are calculated, the accumulated thermal aging life loss of the stator winding insulation of the steam turbogenerator is calculated, the residual thermal aging life of the stator winding insulation of a steam turbogenerator is calculated; the results are calculated and analyzed, sent to the database server to store and for a website server to call up. The invention allows quantitative predication of the residual thermal aging life of the stator winding insulation of a steam turbogenerator at the use phase of the steam turbogenerator, and makes the thermal aging life of the stator winding insulation of the steam turbogenerator controllable.
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Description

Technical field

[0001] The invention relates to a method and system for predicting the thermal aging life of steam turbine generator insulation, in particular to an on-line prediction method and system of thermal aging cumulative life loss and remaining thermal aging life of steam turbine generator insulation, which is applied to steam turbine power generation Engine life management belongs to the technical field of steam turbine generators. Background technique

[0002] Insulation thermal aging is one of the reasons for the damage of turbine generator windings. Both stator windings and rotor windings of turbine generators have insulation thermal aging problems. Considering that the working voltage of the turbine generator stator windings is higher than the rotor windings, the stator windings are insulated The thermal aging problem is more serious. The online prediction of the thermal aging life of the steam turbine generator insulation uses the turbine generator stator winding a...

Examples

Embodiment

[0068] There are 42 slots in the stator winding of a certain type of 600MW turbo-generator. figure 1 The shown steam turbine generator stator winding insulation thermal aging life online prediction system adopts figure 2 The flow chart of the online prediction method for the thermal aging life of the stator winding insulation of the turbo generator shown and image 3 The computer software for the online prediction of the thermal aging life of the stator winding insulation of the steam turbine generator shown is running on the calculation / application server of the power plant control center. For the 42 stator slot windings of this type of turbo-generator, during the grid-connected operation of the unit, the database saves stator winding temperature data every 30 minutes. Above 41℃ (41℃ to 90℃) every 5℃ is regarded as a temperature section. Below 40℃ is regarded as a temperature section, and the actual temperature monitored above 91℃ is stored in the database. The thermal aging...