Construction Method of Core Backbone Grid Based on Improved Fireworks Algorithm and Risk Theory

With the proposal of the “dual carbon” goal and the large-scale integration of new energy into the grid, there are uncertain factors in power supply, power grid and load, which will significantly enhance the operation risk of power grid. On this basis, considering the impact of natural disasters, the establishment and construction of the core backbone grid is of great importance. This paper proposes a risk assessment system of power grid operation involving multi-link uncertain factors. And the search model of the core backbone grid is constructed with the minimum comprehensive risk index and the minimum total line length as the objective function, and the network connectivity and power network security operation as the constraints. For stronger searching ability, the traditional fireworks algorithm is improved by introducing new explosion mode, new Gaussian variation, new mapping rules and elite-random selection strategy. Finally, the improved IEEE 39 system is simulated and the obtained backbone network frame meets the search requirements. Through comparative analysis of the grid changes under energy transition, the rationality of the objective function and the validity of the search system can be proved by the search results.