Optimization Strategy for Demand Response Participation of Heterogeneous Flexible Load Aggregators Based on Inner Approximation Method

Flexible load resources on the demand side are characterized by diverse types, small capacity, and wide distribution. Since these load resources cannot be individually invoked at the system level, it is becoming increasingly important to consider how to establish heterogeneous flexible load aggregates and utilize their adjustable characteristics. In response to the above problems, this paper establishes mechanistic models for three specific heterogeneous load resources, uses the basic homothetic polytope to approximate the original feasible region of loads, and aggregates the feasible region of heterogeneous load resources using the Minkowski sum, while ensuring the aggregation speed and accuracy. Finally, for scenarios of system load shedding and high wind and solar penetration, a demand response strategy on the load side is introduced, and the role of this method in system power supply guarantee and new energy consumption is illustrated through a numerical example.