Mechanism and Realization Path of Policy Synergy in Multi-energy Complementary System Driven by Carbon Neutrality Goal

In order to build a new power system with renewable energy as the main source and complementary development of various energy sources, it is urgent to establish an efficient collaborative mechanism for government-led, comprehensive energy generation by power producers and active emission reduction by typical energy-using enterprises under the drive of carbon neutrality. By connecting policy coordination with energy saving and carbon reduction behaviors of micro entities of power production enterprises and typical energy-using enterprises, a dynamic game model of "government departments-power producers-typical energy-using enterprises" is constructed from two perspectives: carbon market covers only the power industry and the entire energy-using industry. The research reveals the carbon cost reduction, operation efficiency and evolution path of carbon market, renewable energy price subsidy and green certificate market under the goal of carbon neutrality. The study finds that under the condition that carbon market only covers the power industry, power producers can achieve the equilibrium solution of comprehensive energy power generation, while the equilibrium solution of typical energy-using enterprises is negative emission reduction, with low carbon reduction cost and inter-industry " carbon leakage " . After the carbon market is expanded to all energy-using industries, there is an ideal evolutionary stable strategy equilibrium solution of promoting the development of multi-energy complementary system among three entities (carbon market and green certificate market, comprehensive energy power generation, active emission reduction), with high carbon reduction cost but good effect. Moreover, the strategy selection of government departments is stable, while the strategy selection of the other two entities is affected by parameter stability conditions . Based on the industrial energy demand of economic growth and the requirements of achieving carbon peak and carbon neutrality in stages, a " three-step" policy coordinated development path is proposed to promote the efficient operation of the multi-energy complementary system.