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- W2388428493 abstract "January 22 and May 7, 2014, ±800 kV Nuozhadu UHVDC transmission project was starting artificial grounding test under monopole metallic return operation mode, DC system blocked by relative protection action. The inspection result shows that the blocking events are caused by pressure relief of the neutral bus F1 arresters. Through the simulation analysis of the overvoltage and the disassembled experiment for the neutral bus F1 surge arrester, the damaged probabilities caused by current uneven distribution, moisture ingress, and system energy overload are excluded. And reached the reason of the damaged arrester is that some varistors are flawed. The flawed varistors first breakdown in artificial grounding test, then generate the arc to make arrester internal breakdown and damage. It is suggested that manufactures check the process control of the varistor production and control the qualified rate of varistor screening tightly. Meanwhile, testers should detect the neutral bus arrester condition during artificial grounding test. Once an abnormal temperature of the arrester is found, it is necessary to stop the artificial grounding test and carry out the arrester test." @default.
- W2388428493 created "2016-06-24" @default.
- W2388428493 creator A5086339510 @default.
- W2388428493 date "2015-01-01" @default.
- W2388428493 modified "2023-09-23" @default.
- W2388428493 title "Fault Analysis of Neutral Bus Arrester Damaged in Artificial Grounding Test of ±800 kV Nuozhadu UHVDC Transmission Project" @default.
- W2388428493 hasPublicationYear "2015" @default.
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