A study of load characteristic of the building heating and cooling system in smart distribution grid

The load of air conditioner has taken a significant percentage of whole social load. The paper firstly constructed a four-node electrical circuit to model the thermal behaviour of a building. And the four-node electrical circuit model was verified by a professional commercial software. Then the loads of heating and cooling systems installing on buildings with different thermal integrity levels were simulated by the four-node electrical circuit model. The results proved that the four-node electrical circuit is able to effectively identify the load characteristics of heating and cooling systems installing on different buildings.