Optimal Operation of Electro-thermal Energy Systems With Concentrated Solar Power Plant

To explore low-carbon and efficient utilization of new energy, represented by wind and solar energy, is an important demand for China to achieve the "Double-Carbon Goal". Concentrated solar power (CSP), an emerging solar energy utilization method, has the advantages of both low carbon generation and efficient energy storage, but its energy supply potential has not been fully developed due to its high generation cost and limited market compensation mechanism. It is of great significance to develop the high temperature heating function of CSP thermal energy storage system and its coordinated operation with the electric-thermal system in order to improve the consumption of new energy and reduce carbon emission. Therefore, this paper establishes the optimal operation model of the electric-thermal energy system with a CSP plant and considering the green certificate transaction, and puts forward the evaluation indexes from the aspects of operation economy, renewable energy utilization rate and low carbon benefit. The validity of the model is verified in the IEEE standard example system. The optimal allocation scheme of CSP thermal energy storage capacity is explored, and the compensation effects of different green card transaction prices and the system income distribution ratio on the CSP cost are analyzed. Finally, the feasibility and flexible operation benefits of the CSP participation in heating are demonstrated with a practical example in a northwest province, which provides a method support for the carbon reduction planning and the operation of CSP in the electric-thermal integrated energy system under the background of "carbon neutrality".