Cyber-Physical Integration Design for Frequency Regulation in Virtual Power Plants Facing Diverse Communication Issues

The virtual power plants (VPPs) formed by aggregating distributed energy resources on the demand side have high potential in frequency regulation of power systems. However, due to the complexity of real communication network, diverse communication issues, such as random packets loss and malicious cyber-attacks, may cause undesirable power dispatch and inaccurate dynamic control. This brings great challenges to the participation of VPPs in frequency regulation. To bypass these hurdles, we propose a cyber-physical integration design to facilitate VPPs frequency regulation in a real-time and reliable manner. First, we suggest a joint design scheme of VPPs power dispatch and communication resources allocation for packets loss under cloud-edge collaboration. That is, in the physical-layer, we propose the VPPs power dispatch under packets loss and in the cyber-layer, we develop the communication resources allocation strategy. This scheme aims to eliminate the packets loss impacts and thus determine accurate power dispatch. Second, we present a high reliable information transmission approach for preventing cyber-attacks under edge-end collaboration. Specifically, in the physical-layer, we implement dynamic control for responding to received regulation power and in the cyber-layer, we execute digital signcryption algorithm. Its objective is to improve system information transmission against cyber-attacks and thus ensure the accurate dynamic control. Finally, simulation results validate the feasibility and superiority of our proposed integration design.

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