Abstract:

In this paper, a new type of stopping system that takes into account both fire and blast resistance is proposed in order to improve the safety performance of the valve hall of the newly built UHVDC converter station. The sample stopping system with a size of 5 m × 5.2 m is conducted under the hydrocarbon fire curve, and a numerical analysis model for blast resistance performance of the stopping structure is established to calculate the dynamic response process of the new stopping structure under typical explosion conditions. The results show that the new blast and fire stopping system proposed in this paper has a fire resistance rating of more than 3 hours under the hydrocarbon fire curve. Meanwhile, the new stopping structure is in an elastic state under the designated blast loading and does not affect the fireproof performance of the system. 

Key words: fire protection, converter station, stopping system, blast and fire resistance, fire endurance