Long-running-year generator life extension evaluation system

Abstract

The invention discloses a system for evaluating the service life of a generator running for a long time. The system comprises a qualification evaluation module, a generator inspection evaluation module and an on-site insulation diagnostic test evaluation module, wherein the qualification evaluation module comprises generator operation condition evaluation, maintenance condition evaluation, historical test data evaluation and delivery data evaluation; the generator inspection and evaluation module comprises professional inspection of accessible areas of a generator stator part, a rotor part andan iron core part; the on-site insulation diagnostic test evaluation module comprises a generator stator winding diagnostic test, a rotor winding diagnostic test and a stator core diagnostic test. Starting from aging elements of the generator, a targeted evaluation module is constructed according to the action mechanism and representation of each aging element, and finally, a generator life extension evaluation system which runs for a long time is jointly formed by a qualification evaluation module, a generator inspection evaluation module and a field insulation diagnostic test evaluation module.

Description

technical field [0001] The invention belongs to the field of generator evaluation, in particular to an evaluation system for life extension of generators with long operating years. Background technique [0002] During the operation of the generator, the insulation of the stator and rotor is affected by electrical, thermal, mechanical stress and environmental factors. When the electrical stress (electric field strength) is too high, partial discharge will occur, and the charged particles generated by partial discharge will destroy the chemical bonds of the insulating material and last long enough. Penetrating holes form over time leading to insulation failure. The design life of generators used in thermal power plants is generally 30 years. When the operating life of the generator is close to or reaches the design life, the power plant manager will have doubts about whether the generator is suitable for continued operation, and what major operational risks will exist if it co...

AI Technical Summary

Problems solved by technology

[0004] To sum up, at present, for generators whose operating life is close to or reaching the design life, there is a lack of a set of effective life extension evaluation methods and systems for long-term generators, so as to scientifically solve the common problem of extending the service life of generators

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