Natural gas network model construction method and device, medium and equipment

The invention discloses a natural gas network model construction method and device, a medium and equipment. The method comprises the steps of establishing a dynamic physical model of a natural gas network based on flowing characteristics of natural gas flowing through pipelines in the network; based on the characteristics of the nodes in the natural gas network, constraint conditions are established, and the constraint conditions comprise initial constraint, boundary constraint and topology constraint; the dynamic physical model is subjected to differential processing, a differential model is obtained, the differential model and constraint conditions are simplified based on variables at each moment, a time domain two-port model of the natural gas network is obtained, and the variables comprise mass flow variables and pressure variables. According to the method, the partial differential equation set describing the dynamic transmission process of the natural gas pipeline is converted into the time domain linear