COORDINATED CONTROL OF HYBRID ENERGY STORAGE BASED ON ENHANCED ACTIVE DISTURBANCE REJECTION CONTROL
It is difficult to realize the ideal dynamic of microgrid under complex disturbance.Based on the frequency division framework and linear active disturbance rejection(LADRC)theory,a hybrid energy storage enhanced active disturbance rejection coordinated control strategy is proposed in this paper.In this scheme,a cascade linear extended state observer(LESO)is introduced into the outer loop to output an ideal wave suppression instruction and improve the immunity.At the same time,the reference differential feedforward is introduced into the auto-disturbance rejection control law of the inner loop to optimize the tracking ability of the output instructions of the outer loop and improve the dynamic performance.Based on the theoretical analysis,the advantages of the enhanced active disturbance rejection coordination control are analyzed from the aspects of disturbance observation accuracy,reference tracking error and disturbance attenuation,and the guiding ideology is provided for parameter tuning.Finally,the performance of the proposed strategy is tested on the semi-physical simulation platform to verify its feasibility and effectiveness.
microgridsenergy storagedisturbance rejectionfrequency division framecascaded linear extended state observerreference differential feedforward
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