Study on the Measurement of the On-Site Overvoltage and Internal Temperature Rise Simulation of the EMU Arrester

In order to analyze the explosion accidents of CRH5 EMU roof arrester in recent years, an internal temperature measuring platform based on fluorescence fiber was established, and distribution characteristics under continuous operating voltage high-current impulse were analyzed. The test results show that passing section overvoltage steep have higher amplitudes, while high-harmonic has a lower amplitude but longer duration. maximum rise 5.2 °C 34 kV for 3 h. surface valve plate column high middle low both sides; difference at different positions only 2.2 °C. rose 97.6 105 times impulse, reached 33.8 Then, actual operation measured analyzed statistically, simulation model established. normal with electric tree studied typical overvoltage, influence air velocity that, due small current defective arresters very small. Under effects can reach 36.57 241 °C, defect 44.75 536 respectively. little effect arrester. Passing occur frequently obvious arrester, so is important reason burst.