Lightweight Trust Evaluation Method for Virtual Power Plant Heterogeneous Access Terminals
In response to the widespread access of various types of heterogeneous terminals causing a sharp increase in attack interfaces in virtual power plant(VPP),traditional security methods struggle to defend against internal net-work attacks,leading to unreliable and discontinuous terminal access.To address this issue,this paper proposes a lightweight trust evaluation method for VPP heterogeneous access terminals based on private blockchain technology,aiming to achieve secure,accurate,and efficient trust evaluation of these terminals.First,by analyzing the interac-tion characteristics of various heterogeneous access terminals,a virtual mapping mechanism is established for various types of heterogeneous terminals in the VPP.Then,a multi-factor trust evaluation method based on information en-tropy is proposed.This method considers three trust factors:terminal communication behavior,data quality,and transmission rate.Information entropy is used to fuse and weigh the various trust values,thereby avoiding subjective allocation of trust weights and improving the accuracy of trust evaluation for heterogeneous terminals.Second,a trust parameter consensus method based on private block-chain is introduced for managing massive heterogeneous termi-nals.This method achieves reliable screening of on-chain trust parameters by designing a full-node consensus verifica-tion mechanism,effectively verifying the legitimacy and authenticity of trust parameters.The Merkle mountain is used to construct root Hash for trust parameters layer by layer,improving the traditional private block-chain block struc-ture.This approach reduces the complexity of trust parameter storage and calculation,achieving lightweight storage and calculation of trust parameters.Finally,the trust evaluation performance under various types of terminal access is analyzed through simulations in a 10 kV VPP environment consisting of a wind farm,a photo-voltaic device,an energy storage system,and various heterogeneous terminals.The simulation results show that the proposed method outperforms existing trust evaluation methods,effectively resisting defamation and ON-OFF internal network attacks while achieving secure,accurate,and lightweight trust evaluation of heterogeneous terminals.
virtual power plant(VPP)heterogeneous terminallightweightprivate blockchaintrust evaluation
万方数据
维普
