Combined with the advantages of the abundant coal storage, the stabilization of thermal power and the rapid development of clean energy, the construction of large-scale integrated energy bases is an important topic to adjust the energy structure and build the new energy system. Longdong district is suitable to construct the integration of wind, solar, thermal power and energy storage base because of its abundant storage of coal, oil, wind and solar resource. Based on the local energy resource and the geographical condition, a 10 GW integrated power system was designed,in which the planned capacities of wind power, photovoltaic and clean thermal power were 4.5 million, 1.5 million and 4 million kW respectively. To friendly connect to power grid, the integrated power system is configured with 30 MW/15 MWh energy storage for AGC frequency modulation and 150 MW/300 MWh energy storage for suppress the fluctuation of solar energy. Furthermore, in order to further analyze the rationality of the comprehensive energy base planning, the production simulation of the power generation system was carried out.The simulation indicates that peak load regulation by thermal power can reach the goal of high reliability, low dependence of power grid and high proportion of clean energy. The simulation also indicates that peak load regulation by thermal power and energy storage together can improve reliability of high DC and comprehensive utilization of power grid. Conclusively, the research of this paper achieves multi-energy complementary, uniformity dispatching, flexibly adjusting of power, coordinated development of power and grid.