Construction of the core backbone grid based on the maximum profit-to-risk ratio

The construction of the core backbone grid affects the ability of the power system to resist disasters and failures. However, traditional construction methods favor stable water and thermal power sources, which are no longer in line with the development trend of modern power systems. After new energy is connected to the core backbone grid, how to balance the system risk and the economic benefits it brings needs to be solved urgently. This paper takes the maximum profit-to-risk ratio as the objective function, and constructs the core backbone grid by a step-by-step method. The results of the improved IEEE 188 node calculation example show that the method proposed in this paper can effectively distinguish the key branch and nodes of the system. The core backbone grid structure constructed can ensure the stability of the system and improve the economy of the disaster-resistant system through the access of new energy units.