The variability and intermittency of light intensity, caused by cloud movement and weather conditions, can create fluctuation in the photovoltaic (PV) power generation. In a microgrid with a high PV penetration, these can affect severe microgrid voltage. . In order to improve the stability of photovoltaic grid voltage output, a multi time scale optimal control method for photovoltaic grid voltage fluctuation based on load change stability adjustment is proposed. However, the battery. . Literature [7–10] takes the DC microgrid composed of photovoltaic power generation, energy storage device, converter and DC load as the research object, considers two operation modes of island and grid connection, designs two operation modes of the system and studies the operation control strategy. .
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