Do you know the main points of substation maintenance?

1. Maintenance of the surface of high-voltage insulating sleeves and pillar insulators

The foggy, dusty, and dirty insulators with snow on the insulators will reduce the insulation performance of the post insulators, and flashover will occur on the surface of the insulators. In severe cases, short-circuit accidents of high-voltage electricity to the ground will occur, which directly affects the power supply.

To maintain the cleanliness of the surface of high-voltage insulating sleeves and post insulators, wipe the insulators with a towel (it is absolutely forbidden to use cotton yarn ends) to remove dust and dirt, and then apply a layer of insulating silicone oil.

2. Maintenance of isolating switch operating mechanism

Outdoor isolation switches are often affected by wind, frost, rain, snow, and fog, and the working environment is poor. Therefore, there are higher requirements for outdoor disconnecting switches, which generally should have ice-breaking ability and higher mechanical strength. If the operating mechanism is inflexible, or the operator is unfavorable to operate in cold weather, it will cause a critical situation of "the power will not be cut off for a while," which is likely to further spread the accident.

The operating mechanism should be flexible in operation, and attention should be paid to the daily maintenance of the isolating switch. The following should be done: ①The bearing seat is sealed, the grease in the seat is clean, no impurities are invaded, and a good lubrication state is ensured; ②The rotating shaft and the mechanism in the manual operation box operate flexibly , Barrier-free jamming; ③The cross-link linkage mechanism is adjusted properly and the linkage is flexible.

3. The drop-out high-voltage fuse prevents accidental fall

Winter winds are strong. For fuses that are poorly assembled, sloppy in operation, and not closed tightly, in case of strong wind, a slight vibration will cause accidental fall. Therefore, when assembling, you should properly adjust the distance between the steel sleeves at both ends of the fuse tube so that it can match the size of the fixed part; during operation, you should try several times to observe the fit. You can touch the operating ring with the insulating rod and shake it slightly. Once, check to confirm that it is tight.

4. Normal oil level and oil replenishment during transformer operation

An oil level gauge is installed on the transformer oil conservator to monitor whether the oil level is normal. The oil level is not only related to transformer operating temperature, load, oil tank leakage, etc., but also closely related to the temperature of the environment. The low outdoor temperature in winter often causes the oil level to be lower than the lower limit of the oil level gauge. When the oil level is abnormal, refuel in time. For oil replenishment of the transformer in operation, pay attention to connect the heavy gas protection to the signal device before replenishing the oil to prevent accidental tripping; after replenishing the oil, check the Buchholz relay and release the gas in time, and the heavy gas protection can be activated after 24 hours without problems. It is forbidden to replenish oil from the oil drain valve at the bottom of the transformer to prevent the dirt at the bottom of the transformer from entering the transformer body.