Comprehensive offline test platform of generator rotor insulation measurement device

Abstract

The invention discloses a comprehensive offline test platform of a generator rotor insulation measurement device. The comprehensive offline test platform of the generator rotor insulation measurement device comprises a rotary experimental platform and control console connected with the rotary experimental platform, wherein the rotary experimental platform comprises a motor, a sliding ring shaft, a sliding ring and a first carbon brush which are installed on the rotary experimental platform. The sliding ring shaft is connected to a driving shaft of the motor, and the sliding ring sleeves the sliding ring shaft and rotates with the sliding ring shaft. During testing, the motor can reach to a rated rotation speed, and the first carbon brush is lifted to be in contact with the sliding ring and output an electric signal. The control console comprises a motor power distribution and control loop, a carbon brush power distribution and control loop and an oscilloscope. During testing, the oscilloscope is used for recording waves, and the situation that waveforms of input electrical signals are free of clutters is confirmed. Accordingly, when the motor reaches to the rated rotation speed, the first carbon brush and the sliding ring are always in contact, and the first carbon brush does not bounce on the surface of the sliding ring. A test proves that the first carbon brush cannot bounce on the surface of the sliding ring, and accordingly the problem of ground protection false alarming of a generator rotor can be solved.

Description

technical field [0001] The invention relates to the field of false alarm simulation experiments of a generator rotor insulation measuring device, in particular to a comprehensive off-line test platform for a generator rotor insulation measuring device. Background technique [0002] The generator rotor insulation measurement device uses a pair of electromagnets or spring-type carbon brush contact slip rings to apply power frequency injection signals between one pole of the rotor winding and the ground, and the measurement device measures the injected current to calculate the rotor-to-ground insulation. value. [0003] During operation, because the carbon brush jumps on the surface of the high-speed rotating slip ring, the measurement signal current is interrupted and then turned on again, because the capacitor voltage cannot change suddenly, causing waveform distortion, and the measurement device is wrong, causing false alarms. [0004] It is necessary to ensure that the par...

AI Technical Summary

Problems solved by technology

[0005] The current difficulty is that after the disassembly and assembly of the carbon brushes and slip rings during the overhaul, the generator has not rushed to the rated speed, the static test means are limited, and it is difficult to judge the static installation quality

What is more difficult is that the static test cannot fully guarantee that the carbon brush will not jump on the su...

Images