What harm will corona do to generators?

    The majority of generator users look at it, do your generators also have corona?

    The corona of the generator is generally formed by internal power generation, which is collectively referred to as the corona. The uneven distribution of the electric field is the biggest cause of corona. When the voltage increases to a certain value near the electrode with a small radius of curvature around the uneven electric field, a discharge will occur due to the free air, forming a corona.

    Corona can damage generator insulation performance. On the surface of the insulator, it will cause the insulating material to heat up to a certain extent and generate acidic substances to corrode the insulator. Damage to the insulator can be implicated in other material damage.

    The generator runs stably in the past operation process without any abnormal analysis, and the main insulation will not be damaged too much, so only the straight-line part of the wire rod is treated with anti-corona treatment.

The steps to deal with the corona phenomenon of diesel generators are as follows:

1.withdraw all the slot wedges, blow dust on the bar and measure the gap between the two sides of the bar and the slot wall.

2.according to the measured gap, insert semiconductor glass cloth plates of different thicknesses into the gap. To make the two sides of the semiconductor glass cloth plate fully in contact with the groove wall and the wire rod, before inserting, brush a low layer on both sides of the semiconductor glass cloth plate. Resistive semiconductor paint.

    The preparation method of the low-resistance semiconducting paint is as follows: slowly pour the toluene liquid into the low-resistance semiconducting paint and stir evenly, take a small amount and evenly apply it on both sides of the white cloth tape, measure the resistance value of 1cm long with a multimeter, and the value is in the order of 10 That's it. The resistivity should be neither too large nor too low. If it is too large, it is easy to cause corona corrosion of the groove, and if it is too low, it will cause the loss of the induced current on the surface of the semiconducting layer.

3.place a 0.5mm thick semi-conductive layer of glass cloth on the upper part of the wire rod and then drive the slot wedge.

To sum up, we can avoid corona and reduce the risk of corona through the above steps; we can also improve the generator set with corona.