Revenue Analysis and Evaluation of Wind-Solar-Thermal Coupled Systems in the Context of Peak Regulation Auxiliary Service Market

In the northern regions of China, the co-location of new energy sources and thermal power plants at a single grid connection point has led to the formation of a unique operational entity. This configuration adheres to an operational paradigm where new energy predominantly fulfills contracted electricity requirements, while thermal power facilities provide ancillary services. This arrangement facilitates a synergistic integration of thermal and renewable energy resources, showcasing substantial potential in the peak regulation auxiliary service market. To rigorously assess the financial performance of such a coupled system in the peak regulation market, this study initially delineates the structure of a wind-solar-thermal coupled system at a unified grid connection point and subsequently evaluates its economic impact within the auxiliary service market. The analysis progresses by employing a bubble sorting methodology to model the participation of this integrated system in the market. Furthermore, the research implements a practical case study by establishing a coupled system in a specified locale within Liaoning Province, wherein its market performance and economic benefits are critically examined. Comparative analysis indicates that the coupled system significantly outperforms traditional power sources and its standalone counterparts in terms of market efficiency and economic viability in the peak regulation context. In the scenario set up in this paper, the revenue capacity of the peaking auxiliary service market after system coupled is enhanced compared with that before coupled, the revenue increases by 2 million yuan.