Abstract
Through the scheduling of demand-side response resources such as electric water heater load, the adverse impact of distributed power output fluctuation on the operation of power system can be reduced and the consumption of renewable energy can be promoted. Firstly, based on the operation framework of load aggregator, the cost and benefit of load aggregator are analyzed, and the demand response compensation strategy based on user comfort is proposed among the components of load aggregator cost. In this study, a flexibility index is established to measure the ability of the system to deal with the output fluctuation of distributed power generation. Finally, an optimal load scheduling model of electric water heater is proposed. The objective function of the model is that the total income of load aggregator and system flexibility are maximum, and the user comfort temperature, wind and photovoltaic output fluctuation and aggregator income constraints are taken into account. The simulation results of numerical examples show that the proposed model has good economic benefits and improves the stabilization effect of distributed wind power fluctuations.
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