【摘要】 新建的市区变电站大多采用布置紧凑、占地面积较小的全户内型变电站，其消防系统通常不建设消防水池，直接从市政管网取水灭火。文章研究该模式下的消防系统运行现状及供水可靠性，以管网中节点的自由水压为参数，采用国际通用的有压管网数值模拟软件EPANET,构建区域管网数值模型，对室内消火栓开启、室外消火栓开启和室内外消火栓同时开启3种工况进行数值模拟分析。结果表明：变电站消防系统开启后，市政管网各节点水压整体降低，少量节点水压低于28 mH₂O,且邻近变电站的节点水压降低幅度大于其他节点；采用2路市政供水干管向变电站消防系统供水，可显著提高变电站消防系统的供水可靠性。研究结果可为典型户内变电站消防系统的设计提供理论依据。更多还原

【Abstract】 Most of the newly-built urban substations are indoor ones with compact layout and small floor area. Their firefighting systems usually take water from the municipal pipe network directly to put out fire instead of building new fire pools. In this paper, the operation status and water supply reliability of the firefighting system under this mode was studied. With the free water pressure of the nodes in the pipe network as the parameter, the international general pressure pipe network numerical simulation software EPANET was used to build the regional pipe network numerical model, and the numerical simulation analysis was carried out for the three working conditions of indoor fire hydrant opening, outdoor fire hydrant opening, and indoor and outdoor fire hydrant opening at the same time. The results showed that after the substation firefighting system was started, the water pressure at each node of the municipal pipe network decreased as a whole, and the water pressure at a few nodes was lower than 28 mH₂O, and the decrease in water pressure at the nodes adjacent to the substation was greater than that at other nodes. The water supply reliability of the substation firefighting system was significantly improved through supplying water from two water supply mains simultaneously. The research results can provide theoretical basis for the design of typical indoor substation firefighting system.更多还原