The application discloses a building load control method based on
phase change energy storage, wherein at least part of rooms in the building are air-conditioned rooms, and a
cold storage structure is arranged on the top of the air-conditioned room; the control method comprises the following steps: determining indoor temperature according to real-time
electricity price and building load; when the real-time
electricity price is in a first period, controlling the air conditioner to provide cold energy for the air-conditioned room according to the indoor temperature and controlling the air conditioner to provide cold energy for the
cold storage structure based on the indoor temperature; and when the real-time
electricity price is in a second period, controlling the air conditioner and the
cold storage structure to synchronously provide cold energy for the air-conditioned room based on the indoor temperature. By adopting the cold
storage structure and the air conditioner synchronous instruction, the use of valley electricity and flat electricity is increased, and the use of peak electricity and peak electricity is reduced, so that the building
electricity cost is reduced, the building
power load in the period of peak electricity and the period of peak electricity is reduced, the
peak load is filled with valley electricity, and the summer electricity pressure is relieved.