Load Tracking Control of Air Conditioners Based on a Second-Order Equivalent Thermal Parameter Model

摘要

Considering an energy crisis and serious environmental problems, demand respond (DR) programs, including price-based DR and incentive-based DR, are designed to improve the stability of the power system. Direct load control (DLC) is one of effective incentive-based control methods relying on directly triggering the load reduction, which is relatively easy and inexpensive to implement. Due to the large electricity consumption and good heat storage capability, air conditioners are the important demand response resources. The accurate thermodynamic model of air conditioner can directly influence the effectiveness of control strategy. In this paper, an air conditioner control method based on the second-order equivalent thermal parameter (FTP) model is proposed, and the load-shifting potential by the DLC of air conditioning load is discussed. The reference signal is calculated for the air conditioners based on the peak-load-shifting requirement. Then an adaptive hill climbing (AHC) control method is designed for tracking the air conditioning load to the reference signal. The simulation results indicate that the proposed approach can achieve a guaranteed load curtailment by the DLC of the air conditioning load.