Thermostatically controlled loads (TCLs) are one of the best candidates to participate in direct load control (DLC). However, little attention is given to the parameter optimization of the TCLs control system due to the complexity of the TCLs' dynamics. In this paper, the parameters of the feedback control system based on the direct compressor control mechanism (DCCM) are optimized using the modified state-queuing (SQ) model, which can provide good characterizaton and greatly simplifies the dynamics of the TCLs. The simulation results verify the effectiveness of the proposed method.
