To address climate change and achieve sustainable development, it is urgent for power systems to transition to low-carbon, clean renewable energy. A high proportion of renewable energy will significantly impact the cost structure of new power systems. This paper studies the costs of various flexible resources in the new power system, including generation, grid, and storage, calculating the Levelized Cost of Electricity (LCOE) according to investment construction costs fuel costs, and operation and maintenance costs. The economic analysis and evaluation of these flexible resources provide scientific guidance for the optimal allocation of resources in the power system, holding significant economic importance.