Generator insulation detection device and detection method of permanent magnet wind driven generator

Abstract

The invention discloses a generator insulation detection device of a permanent magnet wind driven generator. The generator insulation detection device comprises a PLC, a power supply, a communication module, a touch screen, an I / O module, a constant voltage source, a voltmeter, an ammeter, a discharge resistor, a fuse, an overvoltage protection device, a contactor, a transmitter, an intermediate relay, a junction box and a temperature sensor. According to the generator insulation detection device, under the low wind speed condition of the permanent magnet wind driven generator, in normal shutdown time, an insulation resistance test is automatically performed, and insulation diagnosis is performed through detecting the stator insulation resistance, polarization index, absorption ratio and trend curve of the generator.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a generator insulation detection device and a detection method of a permanent magnet wind power generator. Background technique [0002] As the mainstream model of large-scale wind turbines, permanent magnet wind turbines have a very high market share. Due to the climatic environment in which the wind turbine works has the characteristics of large temperature difference between day and night, large wind and sand, high humidity in some areas, and condensation, these environmental factors will affect the insulation system of the wind turbine, and the maintenance of the damaged wind turbine And lifting costs are very expensive. [0003] Due to the particularity of the operating environment of wind turbines, on-site testing is very difficult. For daily maintenance monitoring, the method of manual shutdown detection is basically adopted. Using a megohmmeter to measure the insula...

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Problems solved by technology

[0007] The above two patents only have a certain effect on the detection of partial insulation defects of windings, but the partial discharge test can only indirectly reflect the insulation state

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