Source load cooperative control method and system for realizing photovoltaic and electric heating load power complementation and medium

The invention relates to a source load cooperative control method and system for achieving photovoltaic and electric heating load power complementation and a medium. The method comprises the following steps: firstly, constructing a time-varying relationship between heat supply and indoor temperature change, establishing a thermal dynamic model, mapping a transient thermal equilibrium relationship through an indoor temperature change rate, establishing a thermal comfort temperature of a human body in winter, and constraining a change range of the indoor temperature; the adjusting capacity of the single electric heating load controlled by starting and stopping is evaluated; then clustering processing is conducted on the electric heating loads according to the rated power, the equivalent heat resistance and the equivalent heat capacity, and a relay type control strategy of an electric heating load group is provided; and finally, based on the established electric heating load aggregation model, taking the collect