Abstract: A photovoltaic power station in sand area was taken as the research object to study the transport of wind-drift sand at the front and back eaves of photovoltaic plates and the photovoltaic array roadways so as to figure out the migration of wind-drift sand at different spatial positions of the photovoltaic electric field in sand area.The results showed that:① The sand transport rate at the array was decreased with the increase of height.The optimal fitting equations of sand transport rate at the observation points along the eaves and back eaves of the electric plate and the array roadways were all the polynomial functions with the increase of height.The values of R² were all higher than 0.95,and the fitted results were reliable;② The eigenvalues of wind-drift sand flow structure at the front and back eaves of the electric plate were higher than 1,and the wind-drift sand flow was unsaturated.The eigenvalues of wind-drift sand flow structure at the array roadways were lower than 1,and the wind-drift sand flow was saturated.The electric plate played a guiding role for wind-drift sand transport.As an airflow acceleration zone formed at the bottom of the electric plate,a wind erosion occurred at the bottom of electric plate.Therefore,the bottom of electric plate should be the key area of wind erosion prevention;③ The sand transport rate at all the observation points in the arrays was lower than that in open field.Therefore,the windward marginal zone of the photovoltaic power station should be the key of preventing wind erosion.

Key words: photovoltaic array, spatial position, transport rate, characteristic value of wind-sand flow structure, Inner Mongolia