Research On Distributed Economic Environmental Dispatch Under Cyber Attacks In Smart Grid

Smart grid is a kind of power system supported by information technology,which can realize sustainable development,safety,high efficiency and environmental protection.With the development of digitalization and intelligence of new power system,the distributed economic environmental dispatch in smart grid has become one of the research hotspots.Distributed economic environmental dispatch aims to realize the coordination of economy,environmental protection and reliability of electric power by optimizing the dispatching plan of power system.In addition,cyber-attacks will have an impact on distributed economic environmental dispatch,thus affecting the economy and environmental protection of the power system.Therefore,network security has become an important issue in research and application.Based on the above,this paper focuses on economic environmental dispatch and network security,and discusses distributed economic environmental dispatch under cyber-attacks in smart grid.The main work includes the following two aspects:Considering the existence of communication delay and communication interference,a distributed gradient descent algorithm with state estimator is designed to solve the distributed economic environmental dispatch problem under communication channel attacks in smart grid.Firstly,the attack model of communication delay and communication interference is constructed.Secondly,a distributed gradient descent algorithm is designed to deal with communication channel attacks by estimating the state of output power to compensate the effect of time delay.Furthermore,it is proved that the proposed algorithm can make the incremental costs of each generation unit reach the same and converge to the optimal solution by Lyapunov stability theory.Finally,the proposed distributed gradient descent algorithm is applied to the distributed economic environmental dispatch problem,and the effectiveness of the proposed algorithm is verified by some simulation examples.To solve the distributed economic environmental dispatch problem under network node attacks,an attack isolation strategy based on reputation value is proposed.Firstly,two typical network node attack models of denial of service attack and replay attack are constructed,and a reputation-value-based isolation strategy is designed to resist the influence of colluding attacks.Secondly,the proposed attack isolation strategy is cleverly embedded into the distributed consensus algorithm framework,so as to effectively solve the distributed economic environmental dispatch under network node attacks in smart grid.The convergence and optimality of the designed algorithm are proved through theoretical analysis.Finally,the effectiveness of the proposed strategy is verified by simulation examples of IEEE 14-bus system.The thesis has 18 pictures,3 tables,and 90 references.