Abstract
In this paper, a new blast and fire stopping system of valve hall for UHVDC converter station is proposed. With the hydrocarbon temperature rise curve, the fire resistance test of a 1.4m×1.8m sample was carried out, a numerical model for blast resistant analysis of the firestop structure was established, and the blast resistant performances of the original firestop structure and the new structure were calculated. The results show that the new fire and blast stopping system proposed in this paper has a fire endurance time limit of more than 4 hours with the hydrocarbon heating curve. At the same time, compared with the original system, the blast resistant capability of the new firestop structure is greatly improved.
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