Photovoltaic carport automatic snow removal control method

Abstract

The invention discloses an automatic snow removal control method for a photovoltaic vehicle shed. The automatic snow removal control method comprises the following steps that S1, a photovoltaic array,a grid-connected bidirectional inverter and a controller are arranged on the vehicle shed, wherein a pressure sensor is arranged on a photovoltaic panel of the photovoltaic array; the inclination angle of the photovoltaic panel ranges from 13 degrees to 17 degrees; S2, when the accumulated snow pressure generated on the pressure sensor at night in a snowy day reaches a preset pressure threshold value, the controller is used for switching the grid-connected bidirectional inverter into an energy storage state, so that certain heat is generated on the photovoltaic panel to carry out snow melting; and S3, when the sun rises to generate a photovoltaic starting voltage, the controller is used for switching the grid-connected bidirectional inverter into an inversion state, so that the direct current of the photovoltaic array is converted into alternating current to be output to the electric network. The problem that accumulated snow on the photovoltaic panel affects the power generation efficiency of the photovoltaic system is effectively solved, and the problem of ice when snow melting is carried out on the photovoltaic vehicle shed still can be solved; and by virtue of the downward sliding force generated by the inclined photovoltaic panel due to the gravity of the accumulated snow, the accumulated snow slides off the photovoltaic panel finally.

Description

technical field [0001] The invention relates to a method for removing snow from the surface of a photovoltaic power generation device, in particular to an automatic snow removal control method for a photovoltaic carport. Background technique [0002] Traditional snow removal methods mainly use artificial snow removal, salt spraying or snow melting agent to remove snow on the surface. [0003] Manual snow removal is common and easily accomplished on surface roads. However, snow removal in photovoltaic power generation devices, especially in photovoltaic carports (with a slope of 10 degrees), not only requires climbing but also is difficult to remove snow. The labor cost is high, and the snow removal efficiency is low; the snow removed is easy to accumulate, which affects the movement of finished vehicles in the warehouse area. [0004] Sprinkling salt or spraying snow melting agent on the snow will have a certain effect per unit area. However, due to the large photovoltaic ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an automatic snow removal control method for photovoltaic carports, which can not only effectively solve the problem of snow accumulation on photovoltaic panels affecting the power generation of photovoltaic systems and the construction of photovoltaic power stations in many areas during snow seasons, but also solve the problem of snow melting in photovoltaic carports. To solve the problem of icing in time, to ensure that the snow falls out of the photovoltaic panels without external force, and to improve the power generation efficiency; it can be applied to various photovoltaic arrays of large-scale photovoltaic power plants

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