Abstract
The model-free control strategy based on the adaptive observer is presented to manage load power distribution for distributed generators in DC microgrids. By dynamically linearizing the modeling of the microgrid system, the model-free secondary control signal is designed to coordinate the distributed power sources, so that the load power is distributed proportionally to the rated capacity. In addition, the desired output voltage is introduced to restore the system bus voltage. The control scheme cannot depend on the structural details of the object system, which is structurally simple and easily implemented. Finally, the feasibility of the proposed data-driven scheme is demonstrated through case test results based on the RTDS experimental platform.
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