| 摘要 |
PROBLEM TO BE SOLVED: To provide an emergency transformer cooling system of underground substation for making use of a transformer related to the underground substation in a quick-fix manner at a required minimum level even when functions of a secondary cooler are stopped at disasters such as earthquake and fire. SOLUTION: The emergency transformer cooling system 10A of the first underground substation includes an emergency cooling water supply system 14 which connects a makeup water system 13 for sending makeup water from a water storage tank 33 to a makeup water tank 31, and a cooling water supply system 12 which supplies cooling water to a primary cooler 22 and the secondary cooler 23 under normal operation, and supplies the water in the water storage tank 33 via the makeup water system 13 and the cooling water supply system 12 to the primary cooler 22 side. When the secondary cooler 23 is not cooled, a flow channel of the makeup water system 13 to the makeup water tank 31 side which is open under normal operation is closed, and a flow channel of the emergency cooling water supply system 14 which is closed under normal operation is opened, to supply the water in the water storage tank 33 to the primary cooler 22. COPYRIGHT: (C)2011,JPO&INPIT
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