Simulation of Damage Caused by Oil Fire in Cable Passage to Tunnel Cable

Author:

Liu Feng1,Zhang Jiaqing2,Gu Mengfei3,Liu Yushun2ORCID,Sun Tao2,Ye Liangpeng2

Affiliation:

1. State Grid Anhui Electric Power Co., Ltd., No. 9 Huangshan Road, Baohe District, Hefei 230061, China

2. Electric Power Research Institute, State Grid Anhui Electric Power Co., Ltd., 299 Ziyun Road, Economic and Technological Development Zone, Hefei 230601, China

3. Hefei Power Supply Company, State Grid Anhui Electric Power Co., Ltd., No. 133 Susong Road, Baohe District, Hefei 230022, China

Abstract

In order to evaluate the damage to tunnel cables caused by fire caused by leakage of transformer oil into a cable channel, the fire characteristics of different volumes of transformer oil flowing into a cable channel were analyzed by numerical simulation. The results show that when the total leakage of transformer oil is less than or equal to 3 L, the fire will end within 120 s, and when the total leakage is greater than or equal to 5 L, the fire duration will exceed 900 s. When the leakage amount is 1 L, the cable only burns slightly, and when the leakage amount is 3~12 L, the cable burns obviously. The combustion of the cable is mainly concentrated between 15 s and 75 s, and the overall combustion rate of the cable increases first and then decreases. When the total leakage is greater than or equal to 8 L, the damage distance of the middle and lower layer cable is the smallest. When the total leakage is less than or equal to 5 L, the damage distance of the lower layer cable is the smallest, and the damage distance of the lower layer cable, middle and lower layer cable, and middle and upper layer cable is less than half of the length of the cable channel.

Funder

Anhui Electric Power Co., Ltd., State Grid

Publisher

MDPI AG

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