This paper presents a novel optimal dispatch model of integrated electricity-natural gas system(IEGS)considering demand response and dynamic natural gas flow. On the one hand

energy demand response is included into the proposed model to smooth out day-ahead load curves of electricity and gas

which can improve system efficiency by utilizing the complementary characteristic between different types of energy. Demand side response is detailedly described by price-based and alternative response. The former is used to denote the transfer effect of the same kind of energy among different time periods based on price guidance

while the latter is used to denote the substitution of different kinds of energy at the same time. On the other hand

complicated dynamic natural gas flow function is considered in the proposed model to describe the operation status of the system. The primal operation nonlinear nonconvex model is relaxed into second-order cone programming

which can be directly solved

and the sequential cone programming method is applied to guarantee the strictness of the relaxation. Simulation tests validate that demand response can improve the operational efficiency of IEGS. Compared to the steady-state model

dynamic model can better describe the dynamic process of natural gas network.