2023-02-24
The abnormal voltage increase exceeding the working voltage in the power system under certain conditions is an electromagnetic disturbance phenomenon in the power system. The insulation of electrical equipment withstands the working voltage for a long time, and must also be able to withstand a certain level of overvoltage, so as to ensure the safe and reliable operation of the power system. Studying the causes of various overvoltages, predicting their amplitudes, and taking measures to limit them are the prerequisites for determining the insulation of power systems, and are of great significance to the manufacture of electrical equipment and the operation of power systems.