Method for predicting turbine generator insulating thermal aging life

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.

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...

AI Technical Summary

Problems solved by technology

At present, in order to monitor the running state of the stator winding of the generator, a stator winding temperature measuring element is installed. For different types of turbogenerators, most of the thermal resistance temperature measuring elements are buried between the upper and lower windings of the stator slot on the turbine side of the generator. 1. Monitor the working temperature of the stator winding insulation. Since the cumulative life loss of the thermal aging of the stator winding insulation of the generator is related to the working temperature and the cumulative working time of the insulation, there is no suitable method for online prediction of the thermal aging remaining life of the stator winding insulation of different slots. and the system is available

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