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Appraising method for insulation service life of turbine generator stator winding

A steam turbine generator and generator stator technology, which is applied in the manufacture of motor generators, motor components, electromechanical devices, etc., can solve the problem of incompetence in the design calculation, quantitative evaluation and improvement of the stator windings of the steam turbine generator, and large working current. , The problem of not being able to quantitatively calculate the design value of the stator insulation life of the turbine generator, etc., to achieve the effect of extending the F-class insulation life of the generator stator winding and reducing the cumulative life loss

Active Publication Date: 2011-01-12
SHANGHAI POWER EQUIP RES INST
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Problems solved by technology

[0002] The service life of the generator is related to the insulation life of the generator winding. Due to the high rated voltage and large operating current of the stator winding, the insulation life of the stator winding has become the weak link of the insulation life of the generator winding. The design of the existing turbogenerator method, the efficiency of the turbogenerator can be determined in the design stage, but the design value of the stator insulation life of the turbogenerator cannot be quantitatively calculated in the design stage
Most of the stator windings of high-power turbogenerators use F-class insulation. The life of F-class insulation of turbogenerator stator windings is related to two main factors: thermal aging and electrical aging. At present, F-class insulation of turbogenerator stator windings is There is no suitable method for life design calculation, quantitative evaluation and improvement

Method used

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  • Appraising method for insulation service life of turbine generator stator winding
  • Appraising method for insulation service life of turbine generator stator winding
  • Appraising method for insulation service life of turbine generator stator winding

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Embodiment

[0049] Such as figure 1 Shown, is the flow chart of the method adopted in the present invention; As figure 2 Shown, be the computer software block diagram that adopts the computer software block diagram of the F-class insulation life design prediction of turbogenerator stator winding F grade that writes in C language, be installed on the computer of the design of turbogenerator manufacturing industry or the research department, the turbogenerator provided by the invention The design method for the F-class insulation life of the stator winding of the generator is suitable for the design and evaluation of the F-class insulation life of the stator winding of the high-power turbogenerator above 300MW.

[0050] A certain type of 600MW turbogenerator supporting supercritical and ultra-supercritical 600MW units, rated power 600MW, rated capacity 667MVA, rated power factor cosφ=0.9, generator efficiency η=98.8%, stator winding adopts class F insulation and water cold, use figure 1T...

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Abstract

This invention relates to the method for the design and evaluation of a steam turbogenerator stator winding insulation life (SWIL). The characteristics are: the soft-ware for the design of F-grade SWIL programmed by C-language is installed in a computer of the design and research department of a steam turbogenerator producer. The evaluation procedures are: determining the desired value of the generator service life, calculating the thermal aging SWIL, calculating the electric aging SWIL, calculating the accumulated loss of the thermal aging SWIL, determining the boundary value Dco the said accumulated loss, and finally proceeding this inventive design and evaluation. The advantages are: quantitative forecasting, quantitative evaluation and improvement of F-grade SWIL, meeting the technical requirement of 40 years life.

Description

technical field [0001] The invention relates to a method for evaluating the insulation life of a stator winding of a turbogenerator, which is suitable for the design and evaluation of the F-level insulation life of the stator winding of a turbogenerator with a power of more than 300 MW, and belongs to the technical field of the turbogenerator. Background technique [0002] The service life of the generator is related to the insulation life of the generator winding. Due to the high rated voltage and large operating current of the stator winding, the insulation life of the stator winding has become the weak link of the insulation life of the generator winding. The design of the existing turbogenerator method, the efficiency of the turbogenerator can be determined in the design stage, but the design value of the stator insulation life of the turbogenerator cannot be quantitatively calculated in the design stage. Most of the stator windings of high-power turbogenerators use F-cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/00G06F17/00G06Q50/00
Inventor 史进渊杨宇邓志成孙庆顾华年
Owner SHANGHAI POWER EQUIP RES INST
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