Method for predicting turbine generator insulating thermal aging life
A technology for turbo-generator and life prediction, which is used in engine testing, prediction, machine/structural component testing, etc., and can solve problems such as lack of suitable methods and systems
Inactive Publication Date: 2008-01-23
SHANGHAI POWER EQUIP RES INST
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Problems solved by technology
At present, parallel voltage transformers are installed on the closed bus of the turbogenerator. The output terminal of the voltage transformer is connected to a voltmeter, and the voltmeter is used to measure the stator voltage of the turbogenerator. During the operation of the turbogenerator, the stator The voltage generally changes within ±5% of the rated voltage. Since the cumulative life loss of the electrical aging of the generator stator winding insulation is related to the stator voltage and the cumulative working time, there is no suitable method for online prediction of the electrical aging remaining life of the generator stator winding insulation. Methods and systems are available
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[0065] A certain type of 600MW turbo generator, the design rated voltage U N = 20kV, using the prediction system for the electrical aging life of the stator winding insulation of the turbogenerator shown in Figure 1, the flow chart of the electrical aging life prediction method for the stator winding insulation of the turbogenerator shown in Figure 2 and the steam Computer software for prediction of electrical aging life of turbine generator stator winding insulation, running on a computing / application server in the control center of the power plant. For the three-phase stator voltage of the 600MW turbogenerator, during the grid-connected operation of the unit, the database saves the stator voltage data every 30 minutes. When the generator stator rated voltage U N Within the range of ±10%, every 0.1kV is used as a recording segment of the stator voltage, such as 18.1kV, 18.2kV, 18.3kV, ..., 22.0kV. For this type of 600MW turbogenerator A-phase stator winding insulation, the e...
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The invention relates to a method for predicting the electric aging life of a stator winding insulation of a steam turbogenerator, which is characterized in that, a program for predicating the electric aging life of a stator winding insulation of a steam turbogenerator is written by language C and installed on a calculation / application server, the method is: the basic data are input; the accumulated operation hours of each stator voltage Tau i are calculated; the electric aging lives of the stator winding insulation tei corresponding to each voltage are calculated; the electric aging life losses of the stator winding insulation Eei corresponding to each voltage are calculated, the boundary value Dce for the accumulated electric aging life losses of the insulation is calculated; the rate of the accumulated electric aging life loss of the insulation ee is calculated; the residual electric aging life of the insulation Hrle is calculated; a repairing and processing measure is recommended. The invention allows quantitative predication of the residual electric aging life of the stator winding insulation of a steam turbogenerator at the use phase of the steam turbogenerator, and makes the electric aging life of the stator winding insulation of the steam turbogenerator controllable.
Description
technical field [0001] The present invention relates to a method and system for predicting the insulation electrical aging life of a turbogenerator, in particular to an online prediction method and system for the cumulative electrical aging life loss and remaining electrical aging life of a turbogenerator, which is applied to steam turbine power generation The utility model relates to life management of a machine, belonging to the technical field of a steam turbine generator. Background technique [0002] Insulation electrical aging is one of the causes of damage to turbogenerator windings. Both stator windings and rotor windings of turbogenerators have insulation electrical aging problems. In view of the fact that electrical aging of turbogenerator windings is related to winding voltage, and the working voltage of stator windings It is higher than the rotor winding, and the electrical aging life loss of the stator winding insulation is relatively large. The online predictio...
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Login to View More IPC IPC(8): G01R31/00G01R31/06G01M15/00G06Q10/00G06Q10/04
Inventor 史进渊杨宇邓志成吴茜周昭伟
Owner SHANGHAI POWER EQUIP RES INST