Abstract: In the regional integrated energy system, gas turbine and power-to-gas (P2G) can realize the coupling of the power system and the natural gas system. Frequent adjustments of gas turbine output and P2G gas production rate will cause violent fluctuations in the pressure, flow rate, and line-pack of natural gas in the pipeline, resulting in unsTab. operation of the gas turbine connected to it, which may cause grid failure. In this paper, the method of characteristic which was suiTab. for analyzing the dynamic process of natural gas pipeline in a district energy system was used to solve the partial differential equations describing its dynamic characteristics. The method could obtain dynamic data of pressure, flow rate, and line-pack over time. A natural gas network with a ring structure with uncertain flow direction was used as a simulation case to verify the stability of the algorithm, and the correctness of the results was verified by comparison with thermodynamic calculations. The sTab. operation of the gas turbine depends on the sTab. gas supply. In order to suppress the fluctuation of natural gas in the pipeline, a control strategy of installing a compressor with a constant outlet pressure at the branch node of the pipeline connected to the gas turbine was proposed based on the simulation results. This paper compared the simulation results of the calculation case with compressor and the simulation result of the calculation case without compressor. The comparison result proves the correctness of the control strategy.