Assessment of economic losses of natural gas systems considering the effects of voltage sag

In recent years, the application of Electric-Gas Integrated Energy System(EG-IES) has continued to develop, the coupling and connection between energy sources have become more and more close, and the interaction between power system and natural gas system has become complex. The change of power system network state will not only affect its own system, but also affect the natural gas system through coupling devices, which will cause huge economic loss when it is serious. This paper first analyzes the impact of voltage sag events in the power system on the electricity-gas integrated energy system, and then considers the natural gas system user economic loss assessment based on the process parameter immune time curve to provide a basis for subsequent voltage sag control methods. Finally, an electric-gas integrated energy system composed of IEEE14-node and 10-node natural gas systems is selected as an example to verify the correctness and effectiveness of the evaluation method.