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Control of Photovoltaic Energy Storage Converter Based on Linear Active Disturbance Rejection

In order to improve the rapidity and disturbance immunity of photovoltaic microgrid system, a fuzzy adaptive controller of bidirectional DC-DC converter combined with active disturbance rejection is proposed. The voltage outer loop is improved by combining ADRR and fuzzy adaptive control, and the ADRR control number of the voltage outer loop is adjusted by fuzzy adaptive control. The method improves the response speed and anti-disturbance ability of the tracking target value after the system is disturbed, and improves the transient characteristics of the system. This control method can improve the system stability and noise immunity under the conditions of DC bus voltage drop and load change.