Lightning protection device for protecting small fan in microgrid

Abstract

The invention relates to a lightning protection device for protecting a small fan in microgrid, which consists of a cage-shaped steel hood, a steel base support, a bearing for fixing the upper end of a fan shaft, a bearing for fixing the lower end of the fan shaft, building lightning protection grounding flat iron, fan blades, the fan shaft, a power generator, an insulation ferrule at the upper end of the fan shaft and an insulation ferrule at the lower end. The lower end of the cage-shaped steel hood is coaxially fixedly mounted on the steel base support, four corners of the steel base support are fixedly mounted on the building lightning protection grounding flat iron, the fan shaft is mounted in the center axis of the cage-shaped steel hood coaxially, the upper end and the lower end of the fan shaft are mounted on the cage-shaped steel hood by the aid of the bearing for fixing the upper end of the fan shaft and the bearing for fixing the lower end of the fan shaft through the insulation ferrules at the upper end and the lower end of the fan shaft, and the fan blades are fixedly mounted on the fan shaft between the two bearings for fixing the upper end and the lower end of the fan shaft. Besides, the power generator is fixedly mounted in the steel base support, and an output shaft of the power generator is connected with the fan shaft coaxially. The lightning protection device is simple in installation, solves the problem of lightning protection for the small fan in the microgrid and has great significance in popularization and demonstration.

Description

technical field [0001] The invention belongs to the field of lightning protection devices, and in particular relates to a lightning protection device for protecting a small wind turbine in a microgrid. Background technique [0002] Since small wind turbines are rarely connected to the grid, there is no mature lightning protection scheme. In most cases, small wind turbines are not equipped with lightning protection facilities, but a lightning protection module is installed in the electrical circuit to prevent lightning from damaging the power distribution system without protection. Outdoor wind turbine. The micro-grid small fan system often requires small fans to be arranged on the roof. The usual method is to add lightning rods on the roof or at a higher position. There are serious shortcomings in the lightning protection effect of the lightning rod on the roof: 1. It is not beautiful, which often makes it difficult for the architectural design to pass the local planning re...

AI Technical Summary

Problems solved by technology

There are serious shortcomings in the lightning protection effect of the lightning rod on the roof: 1. It is not beautiful, which often makes it difficult for the architectural design to pass the local planning requirements

3. Due to the short distance between the lightning rod and the low-voltage equipment, the probability of lightning overvoltage accidents in the low-voltage equipment increases, and there is a greater potential safety hazard

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