Fault testing device of power generator stator core and testing method of testing device

Abstract

The invention discloses a fault testing device of a power generator stator core and a testing method of the device. The device comprises Chattock coils, traveling rails, a slide module and a tractiondevice, wherein the traveling rails are symmetrically mounted on two stator teeth; the slide module is symmetrically connected with the traveling rails and provided with traveling wheels; the Chattockcoils are fixedly connected with the two ends of the slide module located on the outer sides of the traveling rails; the slide module is connected to the traction device; and the traction device is fixedly connected with the outside of the stator core. According to the device, the slide module connected with the Chattock coils (test coils) is mounted in an overhung manner via the traveling rails;the traction device is used for traction; the fault testing of the two stator teeth can be achieved at one time; the testing efficiency is greatly improved; jamming of the slide module is effectivelyavoided; and the device is stable in traveling and positioning, high in testing accuracy, simple in structure and low in cost and saves time and labor for a tester.

Description

technical field [0001] The invention relates to a generator stator core fault testing device and a testing method thereof, belonging to the technical field of stator core fault testing devices. Background technique [0002] The stator core is an important part of the generator, and its insulation failure will affect the safe operation of the generator and may cause serious equipment damage. Due to mechanical stress, electromagnetic stress and environmental stress, the insulation between the stator core laminations will deteriorate, and the fault current generated by the deterioration will generate enough heat in the fault area to melt a small part of the core. An increase in core temperature will lead to early damage to the winding insulation. [0003] Carry out fault detection on the stator core of the generator, comprehensively judge whether the insulation between the stator core laminations is good, and whether there is a short circuit, so as to ensure the safe operation...

AI Technical Summary

Problems solved by technology

[0010] (1) The manual trolley, when in use, can test the distance of the stator core by setting a distance-based test in the system, so that when the iron core fails, it can accurately locate the fault point; it can also be used in the system Set up a time-based test, but in actual use, the wheels of the trolley are very easy to get stuck, and the surface of the stator core teeth is uneven. If the trolley wheels do not touch the surface of the stator core teeth, it cannot roll, resulting in distance The sensor cannot count and work, causing the test to fail, and the test must be repeated. In severe cases, the measurement may be repeated more than ten times, which is time-consuming and laborious, and the positioning accuracy decreases;

[0011] (2) Automatic trolley, after setting the length of the stator core, the trolley moves forward automatically to complete the test, but the cost is relatively high, and the cost needs to be increased by about 50w;

[0012] (3) Do not use the trolley, remove the chattock test coil from the manual trolley, hold the coil directly by hand, and test according to the set speed and time, but the internal space of the iron core is limited, and the length is long, which is not suitable for the work. The stability of the hand-held coil of the personnel and the control of time have high requirements, otherwise the fault point cannot be accurately judged, resulting in time-consuming and labor-intensive disassembly and maintenance of the iron core

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