Photovoltaic inverter backflow prevention refers to a technical measure in a photovoltaic power generation system to prevent the power generated by the photovoltaic system from flowing back into the power grid. This technology ensures that the output power of the photovoltaic system does not exceed the actual power demand of the user, thereby avoiding adverse effects on the power grid or potential safety hazards. The demand scenarios for photovoltaic inverter backflow prevention are mainly concentrated in the following aspects: Residential photovoltaic system In the photovoltaic power generation system installed by residential users, if the power generation of the photovoltaic system exceeds the actual power demand of the household, the excess power may flow back into the grid. This may not only affect the stability of the grid, but also involve complex electricity billing and subsidy issues. Therefore, the photovoltaic system of residential users needs to have a backflow prevention function to ensure the balance between power generation and power consumption. [...]