Research on Renewable Energy Absorption Capacity Improvement Technology Considering Cost of Thermal Power Flexibility Retrofit

In order to improve the renewable energy consumption capacity of power system and reduce the minimum technical output and peak load regulation cost of thermal power units, it is necessary to carry out flexible retrofit of thermal power units. So, this paper proposes a renewable energy consumption capacity improvement method based on the flexibility retrofit of thermal power units. This method reduces the operation cost of thermal power units by considering the auxiliary service mechanism, so as to improve the enthusiasm of thermal power plants to participate in the flexible transformation; at the same time, the minimum technology for deep peak load regulation of thermal power units is reduced through the flexibility retrofit; Finally, it is applied to the operation cost model of high proportion renewable power system to evaluate the renewable energy consumption capacity and economic operation cost. Taking a regional power grid in China as an example, this paper compares the impact of different flexibility retrofit methods on the deep peak load regulation capacity of thermal power units in the field of power system operation cost optimization, and introduces the appropriate auxiliary service mechanism to reduce the cost. The research results show that this method can effectively reduce the cost of flexible retrofit and improve the renewable energy consumption capacity of power system.