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Static Sensitivity Analysis Method of Integrated Energy System Based on Power Flow Model

With increasing utilization of gas turbine and power to gas technology, power system and natural gas system can be tightly integrated into Integrated Electricity and Gas Systems (IEGS). In this paper, static sensitivity analysis method based on unified power flow model is used to analyze the interaction mechanism between power system and natural gas system. First, unified power flow model of IEGS is given. Based on the model, gas pressure-active power injection sensitivity matrix of IEGS is defined. Finally, combined with regional comprehensive energy system sensitivity index, the impact of nodal power injection on gas pressure is analyzed, positioning the weak parts of IEGS. It is demonstrated that the method can provide auxiliary information for IEGS operation security, and effectively enhance the robustness of the system.