Since the proposal of the “dual carbon” target

China has accelerated the construction of large-scale renewable energy bases in desert

Gobi and wasteland regions. To improve renewable energy accommodation capacity

this paper proposes an optimization configuration method of electric-thermal hybrid energy storage(ETHES) for Desert-Gobi-Wasteland renewable energy base (DGW-REB) considering the transformation of decommissioned thermal power units into Carnot battery (CB). Primarily

the basic principle of the transformation of decommissioned thermal power units into molten salt CB is analyzed for DGW-REB including electrochemical energy storage and CB

and a model for the economic and technical characteristics of molten salt CB is constructed. Secondly

targeting the maximization of annual net income of DGW-REB and considering the green certificate-carbon trading mechanism

an integrated planning and operation model of ETHES for DGW-REB is established and solved by annual 8 760 h time-series production simulation based on time dimension decomposition. Finally

simulation analyses are carried out by taking a practical renewable energy base example in the Kubuqi Desert as the engineering case. The results verify that the proposed method can support large-scale and high-proportion renewable energy power delivery. The research findings can provide a theoretical reference for the optimization configuration of energy storage of DGW-REB.