Abstract
With the frequent occurrence of high-voltage SF6 equipment-related problems in recent years, the exceedances of micro-water content and decomposition products of SF6 and other problems are getting increasingly worse. The routine solution involves multiple processes, including powering off the equipment, recovering the SF6 gas in the equipment, flushing, injecting new SF6 gas, and conducting the voltage withstand test, which requires a huge number of manpower and material resources. Besides, the operating process is risky, and power cutting and re-supplying increase the operational risk and impair the reliability of the grid in the power supply. This paper mainly explores an efficient, safe, and intelligent online SF6 purification technology, which can achieve the online detection and purification of SF6 micro-water and impurity gases when the high-voltage SF6 equipment is powered on and make the purification units’ renewable. Applying this technology can prevent the power cut of high-voltage power supply equipment, thereby making sure that the grids are safe. It is also environmentally friendly as it can reduce the usage of SF6 gas.
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