Analytical method of synthesis load composition based on static characteristics of electrical appliances

In order to accurately determine the proportion of the electrical appliances in the synthesis load, an analytical method of synthesis load based on the static characteristics of electrical appliances is proposed. First, with measuring devices, port voltage, frequency and active power of the synthesis load within a certain time interval can be acquired. And then, the corresponding static characteristic equations of the electrical appliances are constructed based on the database of static characteristic parameters of electrical appliances. Secondly, the power balance equations during this period between the total power of the electrical appliances and the power of measured ports are established, and then, the improved genetic algorithm optimization is adopted to obtain the optimal combination of rated nominal power of the various electrical appliances in use. After that, according to the static characteristic equations of the electrical appliances, the absorption power of the appliances during the period is solved, then the proportion of the electrical appliances is finally obtained. Finally, a simple resident load system is constructed in Matlab/Simulink, and the proportion of the power appliances under three scenarios is analyzed by the method proposed in this paper. And the simulation results show the rationality of this method.