Research On Modeling And Frequency Control Strategy Of Island Smart Microgrid Under Communication Constraints

Traditional power grids are becoming increasingly complex as distributed power sources continue to be incorporated into the power system.Smart microgrids have emerged as an essential component of the dependable operation of contemporary power systems,serving as the primary carrier for the consumption of renewable energy.The impact of various communication constraints on the steady operation of smart microgrids has increased with the development of distributed control technology for smart microgrids.Using the islanded smart microgrid as the research object,this paper examines the system model and control strategy for the frequency control problem under a variety of communication constraints,primarily in the following ways:(1)To address the issue of frequency control in islanded smart microgrids with time-varying delays and uncertain loads,a model of islanded smart microgrids is presented,and a static output feedback controller is developed.Combining the Lyapunov-krasvskii generalization function,the Jensen inequality,and the robust stability inequality condition results in a linear matrix inequality condition that satisfies the stability condition.Comparative simulations are used to conclude that the designed controller is effective.(2)For the issue of frequency control of isolated smart microgrids,an optimal distributed control strategy has been developed.The system lessens the reliance on the correspondence network by adding a defer remuneration term to the ideal conveyed control.The proposed strategy improves system reliability further by eliminating frequency deviation and achieving active power distribution in a shorter amount of time than conventional control methods.In conclusion,an islanded microgrid model with distributed power sources is built to confirm the proposed strategy’s efficacy.(3)A circulated recurrence control system is given for the correspondence clamor and correspondence geography exchanging that exist in islanded shrewd miniature organizations.By adding a time-varying gain term to the distributed control,the strategy takes full account of communication topology switching and communication noise and significantly reduces their impact on the frequency of the islanded smart microgrid.In comparison to conventional distributed methods,the proposed strategy achieves proportional active power distribution and eliminates frequency deviations.In the end,a simulation model is built and the proposed strategy’s efficacy is checked.(4)A communication topology optimisation scheme for islanded smart microgrids is discussed for distributed frequency control in the presence of communication delay.The scheme uses Lyapunov’s theory to obtain the relationship between communication delay and controller communication topology.The communication topology optimisation strategy is constructed by introducing communication/perception cost and performance metrics to weaken the effect of communication delay on the stability of the distributed frequency control strategy.Finally,a simulation model is built to verify the optimisation effect of the proposed strategy.Finally,the content of the work done in this paper is summarised and a reasonable outlook is given on the future direction of related research.