Condition Cleaning Maintenance Technology of Carbon Brush Slip Ring in Pumped Storage Power Units

During unit operation, the carbon powder produced by the abrasion of the carbon brush may cause pollution flashover, one-point grounding of the rotor, two-point grounding of the rotor and other faults. It will also cause stator insulation aging and other problems. Therefore, it is necessary to carry out regular cleaning for carbon brush slip ring of pumped storage power units. Lacking condition cleaning maintenance technology for carbon brush slip ring of pumped storage power units, and the startup and shutdown of units were affected by priority control, season, system load, etc. So, there were problems caused by over cleaning and insufficient cleaning. In this paper, condition cleaning maintenance technology for carbon brush slip ring of pumped storage power units can effectively solve the above problems. According to the current operation status of the unit, this technology can provide an effective method to predict the next cleaning date of carbon brush slip ring.