Real-time digital co-simulation method of smart grid for integrating large-scale demand response resources

With study of activating the immense potentials of demand response (DR) in load side attracts widespread attention, a simulation platform with the ability of “Source-Grid-Load” interactive operation is essential. Nevertheless it’s an enormous challenge to incorporate the DR resources in real-time simulation as the characteristics of mass, diversity and responsiveness. This paper presents a method of digital real-time cosimulation (DRTCoS) applied to smart grid integrated with large-scale DR resources. Firstly, the strategy that decoupling the network with DR resources from the rest parts according to different dynamic responses is proposed, building the multi-rate digital simulation, and an interface algorithm for the co-simulation is devised. Then DRTCoS that combines Real Time Digital Simulator (RTDS) and the power distribution system simulation, GridLAB-D is built, with typical application scenarios on micro-grid and high-voltage grid studied. Finally, case study validates the effectiveness of the cosimulation based on large-scale air-conditioningloads.