Multi-energy coupling type micro-grid capacity planning method and device based on particle swarm optimization

The invention discloses a multi-energy coupling type micro-grid capacity planning method and device based on a particle swarm optimization algorithm, and belongs to the technical field of power grid planning, and the method comprises the steps: constructing an upper-layer multi-target planning model and a lower-layer optimization scheduling model of a multi-energy coupling type micro-grid, and setting a seasonal scene day; determining the speed and position of an upper-layer particle by using a particle swarm algorithm, and calculating an optimal operation strategy of each scene day by using the speed and position as constraints of a lower-layer optimization scheduling model; inputting the daily optimal operation strategy into the upper layer model to obtain an annual optimal operation strategy, and updating the speed and the position of the particle; and iteratively updating the speed and the position of the upper-layer particles until a termination condition is reached, and obtaining an optimal capacity con