Study on the Phenomena Related to the Loss of Off-site Power Due to Flashover of Insulation Materials of Transmission and Substation Equipment of Coastal NPPs in Case of Salt Damage Caused by Typhoons
Study on the Phenomena Related to the Loss of Off-site Power Due to Flashover of Insulation Materials of Transmission and Substation Equipment of Coastal NPPs in Case of Salt Damage Caused by Typhoons
In September 2020,eight nuclear power units in South Korea experienced a loss of off-site power due to Typhoons Maysak(September 3,2020)and Poseidon(September7,2020).This incident was due to problems with the transmission lines and insulation between the nuclear power plant and external substations and related facilities.This paper investigates and analyzes the cause of the loss of off-site power and the sequence of accidents,and determines that the main cause of the incident was the loss of off-site power due to the flashover of insulation materials of transmission and substation equipment due to insulation degradation under the salt damage caused by the typhoon.At the same time,combing the domestic and foreign similar salt damage phenomenon caused by insulation degradation of the event,the study of salt damage caused by insulation degradation of the flashover phenomenon,to draw conclusions and put forward reasonable improvement proposals.
关键词
盐害/闪络/丧失厂外电/台风/气体绝缘母线
Key words
salt damage/flashover/loss of plant external power/typhoon/gas insulated busbar
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