Abstract: Coal chemical enterprises are mostly continuous production facilities with high requirements for power supply reliability. However, various factors such as electrical equipment failures, external power grid voltage fluctuations, and misoperation can lead to power outages, affecting the safe and stable operation of the facilities. By using devices such as fast power switching and uninterruptible power supply on the power supply side, voltage fluctuations can be reduced. By adopting restart and DC support methods on the power consumption side for devices such as motors and frequency converters that are sensitive to voltage fluctuations, the impact of shaking can be reduced.